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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 4424. Отображено 100.
28-06-2012 дата публикации

Electronic device, and capacitor capacitance detection method applied to the same

Номер: US20120161792A1
Автор: Erika Ikeda, Hiroki Matsushita, Osamu Kawashima, Takehiko Katou
Принадлежит: Toshiba Corp

According to one embodiment, an electronic device includes a capacitor, a power supply device, a discharger and a capacitance detector. The capacitor is used as a backup power supply. The power supply device charges the capacitor. The discharger discharges the capacitor. The capacitance detector maintains a terminal voltage of the capacitor at a given level for a predetermined time, by controlling an operating time of the power supply device. The capacitance detector allows the discharger to start the discharge the predetermined time later. The capacitance detector detects a capacitance of the capacitor based on a transient response characteristic of the discharge.

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Номер записи: 1
16-08-2012 дата публикации

Method for Checking Plausability of Digital Measurement Signals

Номер: US20120209566A1
Автор: Marco Enrique Idiart
Принадлежит: SIEMENS AG

A method for checking plausibility of digital measurement signals, wherein the method comprises forming a trend function for a prescribed number of successive measurement values of the measurement signal, determining the differential values between the measurement values and the trend function if the leading digit of at least one differential value is equal to zero, multiplying all differential values by a factor so that the leading digits of all differential values are non-zero values, determining a deviation between the frequency distribution of the leading digits of the differential values and the frequency distribution in accordance with Benford's law, and generating a warning message if the deviation exceeds a threshold value.

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Номер записи: 2
30-08-2012 дата публикации

Continuous time correlator architecture

Номер: US20120218223A1
Автор: Ajay Taparia, Behrooz Javid, Guozhong Shen, Ozan E. Erdogan, Rajesh Anantharaman, Syed T. Mahmud
Принадлежит: Maxim Integrated Products Inc

An analog front end circuit utilizes coherent detection within a capacitance measurement application. The analog front end circuit uses coherent detection to measure capacitance of a touch screen display. An analog excitation signal is modulated by a capacitor to be measured. The modulated signal is synchronously demodulated using a correlator, which includes an integrated mixing and integration circuit. The correlator includes a programmable impedance element that generates a time-varying conductance according to a controlling digitized waveform.

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Номер записи: 3
11-10-2012 дата публикации

Apparatus and methods for testing of acoustic devices and systems

Номер: US20120256646A1
Автор: G. Wayne Moore, James Gessert, James Ginther, John Timms
Принадлежит: Unisyn Medical Technologies Inc

Methods and devices are disclosed for testing an acoustic probe having transducing elements for converting between acoustic and electrical signals. An electrical signal is generated at a frequency with a testing device capable of generating electrical signals over a range of frequencies. The electrical signal is transmitted to at least some of the transducing elements to measure a complex impedance and thereby evaluate a performance of the transducing elements.

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Номер записи: 4
21-02-2013 дата публикации

High Voltage Sensing Capacitor and Indicator Device

Номер: US20130043891A1
Автор: Bill Blankenship, Sam Handshoe
Принадлежит: SMC Electrical Products Inc

A high-voltage sensing capacitor as an interface apparatus that may be used to attach an indicator unit to a high-voltage AC electrical bus and to provide safety to maintenance personnel. The high-impedance nature of the sensing capacitor effectively isolates the indicator unit from the high-voltage source to which it is connected. The sensing capacitor can be directly mounted between a high-voltage busbar and an indicator unit to provide visual and/or audible alerts to maintenance personnel when high voltage conditions are detected on the busbar. The sensing capacitor is comprised of a portable, unitary capacitive structure that includes a molded insulator body encapsulating two electrodes. The electrodes only partially or incompletely overlap within the insulator body. The electrode spacing and configuration is structured to provide a deliberate amount of coupling between the two electrodes in the presence of an AC electric field.

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Номер записи: 5
28-03-2013 дата публикации

CAPACITANCE MEASUREMENT CIRCUIT AND METHOD THEREFOR

Номер: US20130076376A1
Автор: Chou Shih-Tzung, Kuang Yu, Rao Yong-Nien
Принадлежит: RAYDIUM SEMICONDUCTOR CORPORATION

A capacitance measurement circuit includes an operation amplifier; a reference capacitor having a first terminal coupled to a first input terminal of the operation amplifier and a second terminal selectively coupled to a first or second reference voltage; a sensor capacitor having a first terminal coupled to a second input terminal of the operation amplifier and a second terminal selectively coupled to the first or second reference voltage; an approximation unit having an output terminal and an input terminal coupled to an output terminal of the operation amplifier; a conversion unit having an output terminal and an input terminal coupled to the output terminal of the approximation unit; and a coupling capacitor having a first terminal coupled to the first or second input terminal of the operation amplifier and a second terminal coupled to the output terminal of the conversion unit. 1. A capacitance measurement method for measuring a capacitance of a sensor capacitor , the method comprising:coupling a first charge quantity to a first input terminal of a comparator through a reference capacitor to form a first input voltage at the first input terminal of the comparator;coupling a second charge quantity to a second input terminal of the comparator through the sensor capacitor to form a second input voltage at the second input terminal of the comparator;differentially comparing the first input voltage with the second input voltage to generate a comparison result; andsuccessively approximating an analog voltage according to the comparison result, wherein the analog voltage couples a third charge quantity to the first input terminal or to the second input terminal of the comparator through a coupling capacitor, such that the first input voltage approximates the second input voltage, wherein a successive approximation result reflects the capacitance of the sensor capacitor.2. The method according to claim 1 , further comprising:discharging the reference capacitor and the ...

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Номер записи: 6
28-03-2013 дата публикации

CAPACITANCE MEASUREMENT CIRCUIT AND METHOD THEREFOR

Номер: US20130076377A1
Автор: Chou Shih-Tzung, Kuang Yu, Rao Yong-Nien
Принадлежит: RAYDIUM SEMICONDUCTOR CORPORATION

A capacitance measurement circuit includes an operation amplifier; a reference capacitor having a first terminal coupled to a first input terminal of the operation amplifier and a second terminal selectively coupled to a first or second reference voltage; a sensor capacitor having a first terminal coupled to a second input terminal of the operation amplifier and a second terminal selectively coupled to the first or second reference voltage; an approximation unit having an output terminal and an input terminal coupled to an output terminal of the operation amplifier; a conversion unit having an output terminal and an input terminal coupled to the output terminal of the approximation unit; and a coupling capacitor having a first terminal coupled to the first or second input terminal of the operation amplifier and a second terminal coupled to the output terminal of the conversion unit. 1. A capacitance measurement method for measuring a capacitance of a sensor capacitor , the method comprising:discharging a first input terminal and a second input terminal of a comparator;coupling a second terminal of a reference capacitor to a first reference voltage, wherein a first terminal of the reference capacitor is coupled to the first input terminal of the comparator;coupling a second terminal of a sensor capacitor to the first reference voltage, wherein a first terminal of the sensor capacitor is coupled to the second input terminal of the comparator;stopping discharging the first input terminal and the second input terminal of the comparator;switching the second terminal of the reference capacitor to a second reference voltage;switching the second terminal of the sensor capacitor to the second reference voltage; andsuccessively approximating an analog voltage according to a comparison result of the comparator, wherein the analog voltage is coupled to the first input terminal or the second input terminal of the comparator through a coupling capacitor, such that a first input ...

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Номер записи: 7
11-04-2013 дата публикации

VARIABLE CAPACITANCE SENSORS AND METHODS OF MAKING THE SAME

Номер: US20130088244A1
Автор: Gryska Stefan H., Palazzotto Michael C.
Принадлежит: 3M INNOVATIVE PROPERTIES COMPANY

A variable capacitance sensor includes a first conductive electrode comprising electrically interconnected first conductive sheets; a second conductive electrode comprising electrically interconnected second conductive sheets, wherein the first conductive sheets are at least partially interleaved with the second conductive sheets, and wherein the second conductive electrode is electrically insulated from the first conductive electrode; and microporous dielectric material at least partially disposed between and contacting the first conductive sheets and the second conductive sheets. A method of making a variable capacitance sensor by replacing ceramic in a ceramic capacitor with a microporous material is also disclosed. 1. A variable capacitance sensor comprising:a first conductive electrode comprising electrically interconnected first conductive sheets;a second conductive electrode comprising electrically interconnected second conductive sheets, wherein the first conductive sheets are at least partially interleaved with the second conductive sheets, and wherein the second conductive electrode is electrically insulated from the first conductive electrode;a ceramic material at least partially disposed between and contacting the first conductive sheets and the second conductive sheets; andmicroporous dielectric material at least partially disposed between and contacting the first conductive sheets and the second conductive sheets.2. The variable capacitance sensor of claim 1 , wherein the microporous dielectric material comprises a polymer of intrinsic microporosity.3. (canceled)4. The variable capacitance sensor of claim 1 , further comprising an encapsulant layer covering a portion of the first and second conductive electrodes.5. A method of making a variable capacitance sensor claim 1 , the method comprising steps: a first conductive electrode comprising electrically interconnected first conductive sheets;', 'a second conductive electrode comprising electrically ...

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Номер записи: 8
18-04-2013 дата публикации

CAPACITOR SENSOR CAPABLE OF CONTROLLING SENSITIVITY

Номер: US20130093437A1
Автор: Choi Hyouk Ryeol, CHUNG Jin Ah, KIM Baek Chul, Kim Sung Gi, KOO Ja Choon, LEE Young Kwan, MOON Hyung Pil, NAM Jae Do
Принадлежит: RESEARCH & BUSINESS FOUNDATION SUNGKYUNKWAN UNIVERSITY

There is provided a capacitor sensor capable of controlling sensitivity, wherein the capacitor sensor measures the magnitude and direction of a shear force applied to the sensor, as well as the magnitude of a normal force applied on the surface of the sensor, and consists of a single cell including a pattern electrode capable of varying its shape to control the sensitivity of the sensor. 1. A capacitor sensor capable of adjusting sensitivity , comprising:a capacitor made of a dielectric material with a unique permittivity as an incompressible synthetic dielectric elastomer and having two surfaces that are opposite to each other;two electrodes respectively disposed on the two surfaces of the capacitor, each of the two electrodes formed in a 2-dimensional shape whose width tapers off in one direction, the two electrodes tapering in opposite directions, and a degree to which each of the electrodes tapers being variable; anda capacitance measurer connected to each of the two electrodes,wherein the two electrodes partially overlap each other as seen from above, andwhen a shear force is applied to the capacitor sensor, the overlapping area of the electrodes changes, and the capacitance measurer measures the change of the overlapping area.2. The capacitor sensor of claim 1 , wherein each electrode is in the shape of a triangle claim 1 , a trapezoid claim 1 , or a parabola claim 1 , and a part at which in which the electrode tapers off is a vertex part of the triangle claim 1 , a narrow part of the trapezoid claim 1 , or an inflection point part of the parabola.3. The capacitor sensor of claim 2 , wherein if the electrodes are in the shapes of triangles claim 2 , and the top vertices of the triangles face in opposite directions claim 2 , angles of the top vertices of the triangles are adjusted to thereby control sensitivity of the capacitor sensor.4. The capacitor sensor of claim 3 , wherein as the angle of the vertex of each triangle increases claim 3 , the sensitivity of ...

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Номер записи: 9
18-04-2013 дата публикации

PRESSURE-SENSITIVE ADHESIVE LAYER FOR TRANSPARENT CONDUCTIVE FILM, TRANSPARENT CONDUCTIVE FILM WITH PRESSURE-SENSITIVE ADHESIVE LAYER, TRANSPARENT CONDUCTIVE LAMINATE, AND TOUCH PANEL

Номер: US20130093438A1
Автор: Hosokawa Toshitsugu, Inui Kunihiro, Ishii Takaaki, Murakami Ai, Satake Masayuki, Yamazaki Yuka
Принадлежит: NITTO DENKO CORPORATION

A pressure-sensitive adhesive layer of the invention for transparent conductive film has a thickness of 10 μm to 100 μm, and is made from a water-dispersible acryl-based pressure-sensitive adhesive that is an aqueous dispersion containing a water-dispersible (meth)acryl-based polymer and a water-soluble basic component, wherein the water-dispersible (meth)acryl-based polymer comprises 100 parts by weight of an alkyl(meth)acrylate with an alkyl group of 4 to 14 carbon atoms, as a monomer unit, and 1 to 8 parts by weight of a carboxyl group-containing monomer as a copolymerized monomer unit, and the pressure-sensitive adhesive layer contains 200 ng to 500,000 ng of the water-soluble basic component per 1 cmas determined by measurement of the pressure-sensitive adhesive layer. The pressure-sensitive adhesive layer can have satisfactory durability in a high-temperature or high-temperature, high-humidity environment and can suppress corrosion in a high-temperature, high-humidity environment. 1. A pressure-sensitive adhesive layer for transparent conductive film , whereinthe pressure-sensitive adhesive layer has a thickness of 10 μm to 100 μm, andthe pressure-sensitive adhesive layer is made from a water-dispersible acryl-based pressure-sensitive adhesive that is an aqueous dispersion containing a water-dispersible (meth)acryl-based polymer and a water-soluble basic component, wherein the water-dispersible (meth)acryl-based polymer comprises 100 parts by weight of an alkyl(meth)acrylate with an alkyl group of 4 to 14 carbon atoms, as a monomer unit, and 1 to 8 parts by weight of a carboxyl group-containing monomer as a copolymerized monomer unit, and{'sup': '2', 'the pressure-sensitive adhesive layer contains 200 ng to 500,000 ng of the water-soluble basic component per 1 cmas determined by measurement of the pressure-sensitive adhesive layer.'}2. The pressure-sensitive adhesive layer for transparent conductive film according to claim 1 , which contains more than 2 claim ...

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Номер записи: 10
25-04-2013 дата публикации

DETERMINING ACTUATION OF MULTI-SENSOR-ELECTRODE CAPACITIVE BUTTONS

Номер: US20130099805A1
Автор: Dattalo Tracy Scott, JR. Ray A., Reynolds Joseph Kurth, TRENT
Принадлежит: SYNAPTICS INCORPORATED

In a method for determining actuation of a first capacitive button having a first set of at least three sensor electrode elements associated with at least three distinct sensor electrodes, and wherein a sensor electrode element of the first set of sensor electrode elements and a sensor electrode element of a second set of at least three sensor electrode elements of a second capacitive button share at least one sensor electrode in common, indicia is received from the at least three distinct sensor electrodes comprising the first capacitive button. At least three electrode values are generated from the indicia. The at least three electrode values are utilized to determine actuation of the capacitive button. 1. A method for determining actuation of a first capacitive button having a first set of at least three sensor electrode elements associated with at least three distinct sensor electrodes , and wherein a sensor electrode element of said first set of sensor electrode elements and a sensor electrode element of a second set of at least three sensor electrode elements of a second capacitive button share at least one sensor electrode in common , said method comprising:receiving indicia from said at least three distinct sensor electrodes comprising said first capacitive button;generating at least three electrode values from said indicia; andutilizing said at least three electrode values to determine actuation of said first capacitive button.2. The method for determining actuation of a first capacitive button as recited in claim 1 , wherein said utilizing said at least three electrode values to determine actuation of said capacitive button comprises:comparing at least one of said at least three electrode values to an activation threshold value.3. The method for determining actuation of a first capacitive button as recited in claim 1 , wherein said utilizing said at least three electrode values to determine actuation of said first capacitive button comprises:determining a ...

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Номер записи: 11
02-05-2013 дата публикации

CAPACITIVE MEASUREMENT SYSTEM AND METHOD

Номер: US20130106444A1
Автор: Cormier Ronald F., Mueck Michael
Принадлежит: TEXAS INSTRUMENTS INCORPORATED

A capacitance measurement system precharges first terminals (--. . . -) of a plurality of capacitors (--. . . ), respectively, of a CDAC (capacitor digital-to-analog converter) () included in a SAR (successive approximation register) converter () to a first voltage (V) and pre-charges a first terminal (-) of a capacitor (C) to a second voltage (GND). The first terminals are coupled to the first terminal of the capacitor to redistribute charges therebetween so as to generate a first voltage on the first terminals and the first terminal of the capacitor, the first voltage being representative of a capacitance of the first capacitor (C). A SAR converter converts the first voltage to a digital representation (DATA) of the capacitor. The capacitance can be a touch screen capacitance. 1. A passive capacitance measurement system comprising:(a) a successive approximation register analog-to-digital conversion circuit (SAR ADC) including a comparator, an output of the comparator being coupled to an input of SAR logic and switch circuitry which produces a digital output on a digital bus; and 1. a measurement conductor coupled to a first terminal of the capacitor,', '2. a first switching circuit included in both the passive network and the SAR ADC for coupling the measurement conductor to a plurality of conductors included in both the passive network and the SAR ADC,', '3. a divider/CDAC (capacitor digital-to-converter) included in both the passive network and the SAR ADC, the divider/CDAC including a plurality of weighted capacitors each having a first terminal coupled to a corresponding one of the plurality of conductors, respectively, and each having a second terminal coupled by a first conductor to a first input of the comparator,', '4. a first switch having a first terminal coupled the first input of the comparator, and the SAR logic and switch circuitry being coupled to control the plurality of conductors during a SAR conversion., '(b) a passive network for coupling to a ...

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Номер записи: 12
16-05-2013 дата публикации

FILM SENSOR

Номер: US20130120006A1
Автор: Chiba Tsuyoshi, Fujita Masakuni, ISHIBASHI Kuniaki, Sugino Akiko, Yamaoka Takashi
Принадлежит: NITTO DENKO CORPORATION

A film sensor includes a polarizing film, an antistatic layer and a capacitive sensor that are laminated in this order, the capacitive sensor having a transparent film, a transparent electrode pattern formed on one side of the transparent film, and an adhesive layer formed on the one side of the transparent film to embed the transparent electrode pattern. The transparent film is disposed between the antistatic layer and the transparent electrode pattern. The antistatic layer has a surface resistance value of 1.0×10to 1.0×10Ω/□. 1. A film sensor comprising:a polarizing film, an antistatic layer and a capacitive sensor that are laminated in this order,the capacitive sensor having a transparent film, a transparent electrode pattern formed at one side of the transparent film, and an adhesive layer formed at the one side of the transparent film to embed the transparent electrode pattern,the transparent film being disposed between the antistatic layer and the transparent electrode pattern,{'sup': 9', '11, 'the antistatic layer having a surface resistance value of 1.0×10to 1.0×10Ω/□.'}2. The film sensor according to claim 1 , wherein the antistatic layer and the adhesive layer are disposed at a predetermined interval with the transparent film being interposed between the antistatic layer and the adhesive layer.3. The film sensor according to claim 1 , wherein claim 1 , after the adhesive layer has been formed at the one side of the transparent film claim 1 , the antistatic layer is formed at the other side of the transparent film.4. The film sensor according to claim 1 , wherein the antistatic layer includes any one of a surface active agent claim 1 , an alkaline metal salt claim 1 , a polyhydric alcohol claim 1 , a conductive fine particle and a conductive polymer.5. The film sensor according to claim 4 , wherein the alkaline metal salt is bis(trifluoroalkanesulfonyl)imide alkaline metal salt. This application claims the benefit of Japanese Application No. 2011-250903, ...

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Номер записи: 13
30-05-2013 дата публикации

SENSOR SLEEVE FOR HEALTH MONITORING AN ARTICLE

Номер: US20130134992A1
Автор: Buca Peter V., Lee Jay, Schulz Mark, Shanov Vesselin, Sundaramurthy Surya, Zhu Xiangdong
Принадлежит:

A sensor sleeve () for use in detecting a failure in an article () (e.g., a hydraulic hose), the sensor sleeve includes an insulator layer () that separates two electrode layers (). As such, the electrode layers deform to contact each other, which changes the impedance as measured across the electrode layers. The sensor sleeve is designed to change electrical impedance (resistance) due to fluid pressure initiating a hole through the sensor itself. The sensor sleeve will detect the fluid leak when the hole penetrates the sensor and brings the two elastic electrodes in contact with each other and/or the fluid, which when the fluid is conductive fluid, creates a signal path between the first electrode layer and the second electrode layer, which also changes the impedance as measured across the electrode layers. 1. A sensor sleeve for detecting damage to a surface of an article , the sensor sleeve comprising:a first electrode layer covering at least a portion of a surface of an article;a dielectric layer covering a least a portion of the first electrode layer; anda second electrode layer covering at least a portion of the dielectric layer, wherein damage to the surface of the article covered by the first electrode layer, the dielectric layer and the second dielectric layer causes the first electrode layer to contact the second electrode layer, thereby decreasing the impedance between the first electrode layer and the second electrode layer.2. The sensor sleeve of claim 1 , wherein the first electrode layer includes one or more contacts claim 1 , wherein the contacts are configured to puncture through the dielectric layer and make contact with the second electrode layer.3. The sensor sleeve of claim 1 , wherein the article is a pressurized hose having at least one hose layer operable to transfer fluids from one place to another claim 1 , wherein the hose layer has a circumferential surface; and the first electrode layer covers at least a portion of the circumferential ...

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Номер записи: 14
30-05-2013 дата публикации

TOUCH SENSOR AND OPERATING METHOD THEREOF

Номер: US20130134995A1
Автор: HAN Sang-Yun, Hong Jae-Surk, Jung Duck-Young, Moon Byung-Joon
Принадлежит: ATLab Inc.

A touch sensor includes: a pulse signal generator for generating a pulse signal of which pulse width is calibrated in response to a control code; a pulse signal transmitter for transmitting the pulse signal when a touch object is out of contact with a touch pad and stopping transmitting the pulse signal when the touch object is in contact with the touch pad; a pulse signal detector for detecting the pulse signal transmitted through the pulse signal transmitter; and a controller recognizing a non-contact state and adjusting the control code to calibrate the pulse width of the pulse signal when the pulse signal detector detects the pulse signal. In the above-described configuration, the contact of the touch object with the touch pad can be sensed more precisely, and the occurrence of a malfunction in the touch sensor due to changed operating conditions can be prevented. 1. A capacitance measurement circuit comprising:a pulse signal generator for varying a pulse width of a clock signal in response to a capacitance value, and generating a pulse signal;a pulse signal transmitter including a pad through which a capacitance is externally received, the pulse signal transmitter being configured to or not to transmit the pulse signal in response to the capacitance applied through the pad;a pulse signal detector for periodically detecting the pulse signal applied through the pulse signal transmitter, and outputting a detection signal;a counter for gradually increasing or decreasing and outputting a counter value according to predetermined rules in response to the detection signal; anda digital filter for filtering the counter value and outputting the capacitance value.2. The circuit of claim 1 , wherein the pulse signal generator comprises:a clock signal generator for generating the clock signal;a variable delay chain for variably delaying the clock signal according to the capacitance value;an inverter for inverting and outputting the output signal of the variable delay chain; ...

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Номер записи: 15
06-06-2013 дата публикации

"Robust Capacitive Measurement System",

Номер: US20130141121A1
Автор: Lamesch Laurent
Принадлежит: IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A

A capacitive sensing circuit is disclosed, wherein the mixer is directly connected to the sense electrode. The AC transimpedance amplifier in front of the mixer in prior art is removed and replaced by a differential DC transimpedance amplifier respectively integrator. The mixer DC offset voltage or current together with the large amplification factor required after the mixer now would result in an inacceptable DC offset at the output of the signal chain. In order to eliminate the effect of the mixer offset, the amplifying stages after the mixer are AC coupled to the mixer output and one of the signals entering the mixer is phase modulated or amplitude modulated with a known low frequency signal. An additional mixer after the AC coupled amplifying stages is driven with the same low frequency modulating signal, resulting in the wanted DC output signal responsive to the capacitance to be measured. 1. A capacitive detection system , comprising:an antenna electrode;a first AC signal generator configured to generate a first AC voltage signal,a second AC signal generator configured to generate a second AC voltage signal, said second AC voltage having a lower frequency than said first AC signal,a first mixer for mixing said first AC voltage signal and said second AC voltage signal and for generating a modulated AC voltage signal,wherein one of said first AC signal generator or said first mixer is operatively coupled to said antenna electrode to apply said first AC voltage signal or said modulated AC voltage signal to said antenna electrode,a control and evaluation unit operatively coupled to said antenna electrode or a separate receiving electrode, said control and evaluation unit comprising a current measurement circuit configured to measure current signals, said current signals comprising amplitude and/or phase of a current flowing in said antenna electrode or in said separate receiving electrode, said control and evaluation unit being configured to determine a ...

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Номер записи: 16
13-06-2013 дата публикации

CAPACITY MEASURING CIRCUIT, SENSOR SYSTEM AND METHOD FOR MEASURING A CAPACITY USING A SINUSOIDAL VOLTAGE SIGNAL

Номер: US20130147496A1
Автор: HAUER Johann, Moedl Stefan, SAUERER Josef
Принадлежит: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.

A capacity measuring circuit includes a measuring voltage source configured to feed a sinusoidal voltage signal to a first terminal of a capacity to be measured so as to cause a temporal change in a charge stored on the capacity to be measured. The capacity measuring circuit additionally includes a delta-sigma modulator. The delta-sigma modulator is configured to receive a charge from a second terminal of the capacity to be measured and to provide a digital output signal which is dependent on a quantity of the charge received from the capacity to be measured. The capacity measuring circuit may be employed in a sensor system. 1. A capacity measuring circuit comprising:a measuring voltage source configured to feed a sinusoidal voltage signal to a first terminal of a capacity to be measured so as to cause a temporal change in a charge stored on the capacity to be measured; anda delta-sigma modulator, the delta-sigma modulator being configured to receive a charge from a second terminal of the capacity to be measured and to provide a digital output signal which depends on a quantity of the charge received from the capacity to be measured; wherein the capacity measuring circuit is configured to bring the capacity to be measured to a first charge state in a first phase using the sinusoidal voltage signal and to bring the capacity to be measured to a second charge state in a second phase using the sinusoidal voltage signal; andwherein the delta-sigma modulator is configured to receive an amount of charge equaling a difference between an amount of charge stored on the capacity to be measured in the first charge state and an amount of charge stored on the capacity to be measured in the second charge state and to provide the digital output signal in dependence on the amount of charge received.2. The capacity measuring circuit in accordance with claim 1 , wherein the delta-sigma modulator comprises an integration capacity claim 1 , andwherein the delta-sigma modulator is ...

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Номер записи: 17
27-06-2013 дата публикации

CAPACITANCE TYPE MEASURING DEVICE

Номер: US20130162270A1
Автор: Hataita Takehisa, Ikeyama Toshihiro, Kishida Soutaro, KUWAHARA Akira
Принадлежит: HORIBA STEC, CO., LTD.

A capacitance type measuring device for measuring a physical quantity of an object to be measured by measuring a capacitance of a variable capacitor is provided, which achieves compactness, simplicity of structure, and improved measurement accuracy. The capacitance type measuring device may include a primary measuring circuit that is configured with the variable capacitor and a reference electronic element that is a reference to measure a capacitance of the variable capacitor, a secondary measuring circuit that has an impedance conversion element with sufficiently high input impedance and is connected to the primary measuring circuit, and a substrate in which a part or all of the each measuring circuit is formed. The high impedance circuit part may be formed between the variable capacitor and an impedance conversion element, and the reference electronic element may be embedded inside the substrate between a front surface and a rear surface thereof. 1. A capacitance type measuring device that measures a physical quantity of an object to be measured using a change of a capacitance of a variable capacitor comprising:a primary measuring circuit that is configured with the variable capacitor and a reference electronic element that is a reference to measure the capacitance of the variable capacitor;a secondary measuring circuit that has an impedance conversion element with sufficiently high input impedance and is connected to the primary measuring circuit; anda substrate in which a part or all of each measuring circuit is formed;wherein a high impedance circuit part that is formed between the variable capacitor and the impedance conversion element and the reference electronic element are provided inside of the substrate.2. The capacitance type measuring device according to claim 1 , wherein the reference electronic element is a fixed volume capacitor.3. The capacitance type measuring device according to claim 1 , wherein a physical quantity of the object to be measured is ...

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Номер записи: 18
27-06-2013 дата публикации

CAPACITIVE TOUCH SENSE ARCHITECTURE

Номер: US20130162586A1
Автор: Anantharaman Rajesh, Chowdhury Rahim, Erdogan Ozan E., Javid Behrooz, Mahmud Syed T., Shen Guozhong, Taparia Ajay
Принадлежит: MAXIM INTEGRATED PRODUCTS, INC.

An analog front end circuit utilizes coherent detection within a capacitance measurement application. The analog front end circuit uses coherent detection to measure capacitance of a touch screen display. An analog excitation signal is modulated by a capacitor to be measured. The modulated signal is synchronously demodulated using a correlator, which includes a discrete mixer and a discrete integrator. The excitation signal is also input to the mixer such that the modulated signal is multiplied by the excitation signal. The excitation signal is an analog signal having a sine wave function or other waveform. 1. A capacitance measurement circuit comprising:a. an external capacitor; andb. a coherent detection circuit coupled to the external capacitor and configured to measure a capacitance of the external capacitor and to convert the measured capacitance to a corresponding voltage output.2. The capacitance measurement circuit of wherein the coherent detection circuit comprises a discrete mixing circuit and a discrete integration circuit.3. The capacitance measurement circuit of wherein the coherent detection circuit further comprises a signal generator coupled to the external capacitor claim 2 , wherein the signal generator is configured to generate an analog excitation signal.4. The capacitance measurement circuit of wherein the coherent detection circuit further comprises an amplifier and a feedback capacitor coupled to an input and to an output of the amplifier claim 3 , wherein the input of the amplifier is coupled to the external capacitor and the output of the amplifier is coupled to the mixing circuit.5. The capacitance measurement circuit of wherein a modulated analog excitation signal is input to a first input of the mixing circuit claim 4 , wherein the modulated analog signal comprises the analog excitation signal modulated by a capacitance of the external capacitor.6. The capacitance measurement circuit of wherein the analog excitation signal generated by ...

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Номер записи: 19
27-06-2013 дата публикации

Circuit for measuring capacitance and parasitic resistance of a capacitor

Номер: US20130166238A1
Автор: Song-Lin Tong, Yun Bai
Принадлежит: Hon Hai Precision Industry Co Ltd, Hongfujin Precision Industry Shenzhen Co Ltd

A measuring circuit includes a voltage converting circuit, a discharging and sampling circuit, a control circuit, and a charging circuit. The voltage converting circuit converts a voltage to a working voltage and outputs the working voltage to the discharging and sampling circuit. The charging circuit charges a capacitor and outputs a stop charging signal to the control circuit. The control circuit includes a microprocessor with a timer, to output a discharging control signal to the discharging and sampling circuit for controlling the capacitor to discharge according to the stop charging signal. The discharging and sampling circuit includes a discharging resistor, and measures voltages of the capacitor and the discharging resistor. The microprocessor obtains a discharging time of the capacitor for calculating a capacitance of the capacitor, and obtains the voltages of the capacitor and the discharging resistor for calculating a parasitic resistance of the capacitor.

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Номер записи: 20
11-07-2013 дата публикации

ENVIRONMENTAL INFORMATION MEASUREMENT DEVICE, ENVIRONMENTAL INFORMATION MEASUREMENT SYSTEM, AND ENVIRONMENTAL INFORMATION MEASUREMENT METHOD

Номер: US20130176037A1
Автор: Igarashi Hajime, MAKIMURA Hidetoshi, Waki Hiroshi, WATANABE Kota
Принадлежит:

An environmental information measurement device includes: a power source unit; an environmental information detector; a timer; and a controller. The power source unit generates, from an electromagnetic wave received, a power source voltage to be supplied to a load. The load includes the environmental information detector, the timer, and the controller. The environmental information detector includes a detector including a circuit element having an impedance or an electrostatic capacitance that varies according to a physical amount detected under an environment at a measurement target point, and outputs a signal that varies according to a response characteristic of the detector. The timer measures a duration from the time when measurement is initiated to the time when a voltage of the signal becomes a predetermined detection voltage. The controller controls an operation of the environmental information detector. 1. (canceled)2. (canceled)3. (canceled)4. (canceled)5. (canceled)6. (canceled)7. (canceled)8. (canceled)9. (canceled)10. (canceled)11. (canceled)12. (canceled)13. An environmental information measurement device comprising:a power source unit configured to generate, from an electromagnetic wave received, a power source voltage to be supplied to a load;an environmental information detector including a detector, the detector including a capacitor and a circuit element having an impedance or an electrostatic capacitance that varies according to a physical amount detected under an environment at a measurement target point, the environmental information detector being configured to output a signal that varies according to a response characteristic of the detector;a controller configured to control the environmental information detector to supply the power source voltage from the power source unit to the capacitor until the capacitor is charged, and thereafter control the environmental information detector to discharge the capacitor while terminating supplying the ...

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Номер записи: 21
11-07-2013 дата публикации

Robust Capacitive Measurement System

Номер: US20130176039A1
Автор: Lamesch Laurent
Принадлежит: IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A.

A capacitive sensing circuit is disclosed, wherein the transimpedance amplifier in front of the mixer in prior art is removed respectively replaced by an amplifier with low gain and consequently high dynamic range. The mixer DC offset voltage or current together with the large amplification factor required after the mixer now would result in an inacceptable DC offset at the output of the signal chain. In order to eliminate the effect of the mixer offset, the amplifying stages after the mixer are AC coupled to the mixer output and one of the signals entering the mixer is phase modulated or amplitude modulated with a known low frequency signal. An additional mixer after the AC coupled amplifying stages is driven with the same low frequency modulating signal, resulting in the wanted DC output signal responsive to the capacitance to be measured. 1. A capacitive detection system , comprising:a first AC signal generator configured to generate a first AC voltage signal,a second AC signal generator configured to generate a second AC voltage signal, said second AC voltage having a lower frequency than said first AC signal,a first mixer for mixing said first AC voltage signal and said second AC voltage signal and for generating a modulated AC voltage signal,a control and evaluation unit operatively coupled to an antenna electrode or a separate receiving electrode, said control and evaluation unit comprising a current measurement circuit configured to measure current signals, said current signals comprising amplitude and/or phase of a current flowing in said antenna electrode or in said separate receiving electrode, said control and evaluation unit being configured to determine a capacitance to be measured based upon said measured current signals, and to output an output signal indicative of said determined capacitance;wherein said current measurement circuit comprises a capacitance to current or voltage converter coupled across said capacitance to be determined, said current ...

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Номер записи: 22
18-07-2013 дата публикации

TOUCH SURFACE AND METHOD OF MANUFACTURING SAME

Номер: US20130181726A1
Автор: Czornomaz Lukas, Grisolia Jérémie, Mouchel La Fosse ERIC, RESSIER Laurence, Songeon Lionel, Viallet Benoît
Принадлежит:

A device for detecting and quantifying a force applied on a surface comprising a test specimen, an electrically insulating substrate, a first electrode bound to the substrate, a second electrode, an assembly of conductive or semi-conductive nanoparticles in contact with the two electrodes, and a measurement device. The measurement device provides proportional information with respect to an electrical property of the nanoparticles assembly. The electrical property is measured between the first and second electrode. The test specimen is the nanoparticles assembly itself and the electrical property is sensitive to the distance between the nanoparticles of the assembly. The invention uses the nanoparticles assembly itself as a test specimen and allows a force to be quantified even if the nanoparticles assembly is deposited on a rigid substrate. 1. A device for detecting and quantifying a force applied on a surface known as a touch surface comprising:a test specimen;an electrically insulating substrate;a first electrode bound to the substrate and fixed in relation to the substrate;a second electrode;an assembly of conductive or semi-conductive nanoparticles in contact with the two electrodes;a measurement device providing proportional information with respect to an electrical property of the nanoparticles assembly, the electrical property is measured between the first and second electrode, the electrical property being proportional to a variation in distance between the nanoparticles of the assembly; andwherein the test specimen consists in the nanoparticles assembly itself.2. The device according to claim 1 , wherein the second electrode is remote from the first electrode and mobile relative to the substrate claim 1 , and the nanoparticles assembly is located between the two electrodes such that a movement of the second electrode causes a change in the distance between the nanoparticles of the nanoparticles assembly.3. The device according to claim 1 , wherein the ...

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Номер записи: 23
25-07-2013 дата публикации

METHOD OF MEASURING A PHYSICAL PARAMETER AND ELECTRONIC INTERFACE CIRCUIT FOR A CAPACITIVE SENSOR FOR IMPLEMENTING THE SAME

Номер: US20130187668A1
Автор: ENTRINGER Christophe, GROSJEAN Sylvain
Принадлежит: EM MICROELECTRONIC-MARIN SA

The method is for measuring a physical parameter by an electronic circuit connected to a two differential capacitor sensor having two fixed electrodes and a common moving electrode. The electronic circuit supplies first and second digital measuring signals. Each measuring cycle consists on biasing the electrodes by the measuring voltage based on the first digital signal, connecting the fixed electrodes to a supply voltage source for a first biasing, biasing the electrodes by the measuring voltage based on the second digital measuring signal, and inversely connecting the fixed electrodes to a supply voltage source for a second biasing. In first successive measuring cycles, the first and second digital signals are adapted to each cycle by a large step value. In second successive measuring cycles, the first and second digital signals are adapted to each cycle by a small step value until the end of the conversion. 1. A method of measuring a physical parameter by means of an electronic interface circuit connected to a capacitive sensor , which includes at least two differential connected capacitors whose a common electrode is capable of moving relative to each fixed electrode of the two capacitors to alter the capacitive value of each capacitor when the physical parameter is being measured , said electronic circuit including a charge transfer amplifier , which is connected to the common electrode via a switching unit , a logic unit connected to the amplifier output for digital processing of the data supplied by the amplifier and for supplying digital measuring signals , and a digital-analogue converter capable of supplying a measurement voltage to the electrodes via the switching unit , the measurement voltage being defined on the basis of a binary word conversion defining at least one of the digital measuring signals ,the method including several successive measuring cycles for a measurement conversion, wherein each successive measuring cycle comprises the steps of:a) ...

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Номер записи: 24
25-07-2013 дата публикации

METHOD OF MEASURING A PHYSICAL PARAMETER AND ELECTRONIC INTERFACE CIRCUIT FOR A CAPACITIVE SENSOR FOR IMPLEMENTING THE SAME

Номер: US20130191060A1
Автор: ENTRINGER Christophe, GROSJEAN Sylvain
Принадлежит: EM MICROELECTRONIC-MARIN SA

The method is for measuring a physical parameter via an electronic circuit connected to a two differential capacitor sensor having two fixed electrodes and a common moving electrode. The circuit supplies first and second digital measuring signals. Each measuring cycle consists on biasing fixed electrodes by a first biasing and a second biasing reverse of the first biasing, alternated with biasing the electrodes by the measuring voltage based on first and second digital signals. Each conversion starts by a small step value added to or subtracted from each digital signal in each cycle. If the successive identical amplifier output states counted or counted down by a counter is higher than a threshold, a large step value is added to or subtracted from the digital signals in each cycle. Re-adaptation to the small step value occurs when a sign change is detected in the counter, until the conversion end. 1. A method of measuring a physical parameter by means of an electronic interface circuit connected to a capacitive sensor , which includes at least two differential connected capacitors whose a common electrode is capable of moving relative to each fixed electrode of the two capacitors to alter the capacitive value of each capacitor when the physical parameter is being measured , said electronic circuit including a charge transfer amplifier , which is connected to the common electrode via a switching unit , a logic unit connected to the amplifier output for digital processing of the data supplied by the amplifier and for supplying digital measuring signals , and a digital-analogue converter capable of supplying a measurement voltage to the electrodes via the switching unit , the measurement voltage being defined on the basis of a binary word conversion defining at least one of the digital measuring signals ,the method including several successive measuring cycles for a measurement conversion, wherein each successive measuring cycle comprises the steps of:a) biasing the ...

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Номер записи: 25
01-08-2013 дата публикации

SERVO TECHNIQUES FOR APPROXIMATION OF DIFFERENTIAL CAPACITANCE OF A SENSOR

Номер: US20130193990A1
Автор: Tyler Larry, Wu Jin-Yong
Принадлежит: Medtronic, Inc.

Techniques and circuits are described for approximation of the differential capacitance of a capacitive sensor to, among other things, optimize device operation and power consumption. In particular, feedback techniques are utilized for measurement and approximation of the differential capacitance of the capacitive sensor. In accordance with the disclosure, the capacitance approximation value for a test cycle preceding a given test cycle is utilized to reduce the number of iterations to be performed in a continuous series of test cycles. The capacitance approximation value for the given test cycle is reported as being equivalent to that of the preceding test cycle if the variance between the selected capacitance and the unselected capacitance is less than or equal to a first predefined value. 1. A device for approximating a difference between two capacitive components , comprising:a first capacitive component and a second capacitive component;a capacitance approximation bank including a plurality of approximation capacitors;a capacitance adjustment module configured to connect one or more of the approximation capacitors in parallel with one of the first and second capacitive components;a memory location for storage of an indication of a first set of approximation capacitors that was previously connected in a preceding approximation test;a control module that identifies the smaller of the first and second capacitive components, that identifies the larger of the first and second capacitive components, that retrieves the indication of the first set of approximation capacitors and connects the one or more capacitors of the first set of capacitors to the smaller capacitive component, and computes a variation between the value of the larger capacitive component and the value of the smaller capacitive component connected to the first set of approximation capacitors, wherein the difference between the first and second capacitive components is determined to be equivalent to ...

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Номер записи: 26
01-08-2013 дата публикации

High Voltage Sensing Capacitor and Indicator Device

Номер: US20130193991A1
Автор: Blankenship Bill, Handshoe Sam
Принадлежит: SMC Electrical Products, Inc.

A high-voltage sensing capacitor as an interface apparatus that may be used to attach an indicator unit to a high-voltage AC electrical bus and to provide safety to maintenance personnel. The high-impedance nature of the sensing capacitor effectively isolates the indicator unit from the high-voltage source to which it is connected. The sensing capacitor can be directly mounted between a high-voltage busbar and an indicator unit to provide visual and/or audible alerts to maintenance personnel when high voltage conditions are detected on the busbar. The sensing capacitor is comprised of a portable, unitary capacitive structure that includes a molded insulator body encapsulating two electrodes. The electrodes only partially or incompletely overlap within the insulator body. The electrode spacing and configuration is structured to provide a deliberate amount of coupling between the two electrodes in the presence of an AC electric field. 1. A sensing apparatus comprising:an insulator body of a dielectric material configured to allow external electrical connections;an elongated electrode extending a distance into the insulator body; anda hollow electrode extending a distance into an opposite end of the insulator body, the hollow electrode partially surrounding a section of the elongated electrode for an incomplete overlap and a physical separation between the elongated electrode and the hollow electrode, with the dielectric material substantially completely encapsulating the elongated and the hollow electrode and the physical separation therebetween.2. The sensing apparatus of claim 1 , wherein the dielectric material is cycloaliphatic epoxy resin.3. The sensing apparatus of claim 1 , wherein the elongated electrode is configured to be attached to a high voltage busbar of an AC power source.4. The sensing device of claim 3 , wherein the hollow electrode is configured to be attached to an indicator device.5. The high voltage sensing capacitor of claim 3 , further ...

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Номер записи: 27
08-08-2013 дата публикации

METHOD FOR DETECTING PRESSURE ON TOUCH SENSING ELEMENT AND ELECTRONIC DEVICE USING THE SAME

Номер: US20130200906A1
Автор: FANG Kuo Pin, TSENG Shu Hung
Принадлежит: HTC CORPORATION

A method for detecting pressure on a touch sensing element includes the steps of: providing a first potential difference to two electrodes of a first film; charging a capacitor with a division voltage of the first potential difference; sampling a charged voltage of the capacitor to obtain a plurality of first voltage values and calculating a first voltage variation according to the plurality of first voltage values; comparing the first voltage variation with a threshold value; and post-processing at least one of the first voltage values when the first voltage variation is smaller than the threshold value. The present disclosure further provides an electronic device. 1. A method for detecting pressure on a touch sensing element , the touch sensing element comprising a first film and a second film each comprising two electrodes , the method comprising:providing a first potential difference to the two electrodes of the first film;charging a capacitor with a division voltage of the first potential difference;sampling a charged voltage of the capacitor to obtain a plurality of first voltage values and calculating a first voltage variation according to the plurality of first voltage values;comparing the first voltage variation with a threshold value; andpost-processing at least one of the first voltage values when the first voltage variation is smaller than the threshold value.2. The method as claimed in claim 1 , further comprising: ignoring the plurality of first voltage values when the first voltage variation is larger than the threshold value.3. The method as claimed in claim 1 , wherein the first voltage variation is a difference between two adjacent first voltage values claim 1 , a difference between two first voltage values claim 1 , an average of a plurality of differences between two adjacent first voltage values or a variation of a plurality of differences between two adjacent first voltage values.4. The method as claimed in claim 3 , further comprising: ...

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Номер записи: 28
15-08-2013 дата публикации

Detecting a Dielectric Article

Номер: US20130207674A1
Автор: Grossmann Oliver, Hahl Markus
Принадлежит: ROBERT BOSCH GMBH

A device for detecting a dielectric object includes a first electrode and a second electrode. A first unit is configured to determine a first capacitance that exists between the first electrode and a common reference point and that is influenced by the object. A second unit is configured to determine a second capacitance that exists between the second electrode and the reference point and that is influenced by the object. The device further includes a control unit for actuating the first and second units and an evaluating unit that is configured to detect the object when the determined capacitances differ by more than a predetermined amount. The control unit is configured to actuate the units in such a manner that the capacitance determinations are carried out in succession. A switching unit is provided so as to electrically connect the electrode of the respective non-actuated unit to the common reference point. 1. A device for detecting a dielectric object , comprising:a first electrode and a second electrode;a first device configured to determine a first capacitance which exists between the first electrode and a common reference point and which is influenced by the object;a second device configured to determine a second capacitance which exists between the second electrode and the common reference point and which is influenced by the object;a control unit configured to actuate the first and second devices, the control unit being configured to actuate the first and second devices in such a way that the determinations are carried out successively;an evaluation unit configured to detect the object when the determined capacitances differ from one another by more than a predefined amount; anda switching device configured to to electrically connect the electrode of the device which is not actuated at any one time to the common reference point.2. The device as claimed in claim 1 , further comprising a third electrode is arranged in the region of the first electrode and ...

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Номер записи: 29
15-08-2013 дата публикации

CAPACITIVE OCCUPANT DETECTION SYSTEM

Номер: US20130207676A1
Автор: HOYER David, THINNES Martin, VIRNICH Michael
Принадлежит: IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A.

A capacitive occupant detection system comprises at least one antenna electrode to be arranged in a seat and an evaluation unit operatively coupled to said at least one antenna electrode, said evaluation unit being configured for applying, during operation, an alternating voltage signal to said antenna electrode and for detecting an amplitude and/or phase of a displacement current flowing from said antenna electrode towards ground. According to the invention said antenna electrode comprises an antenna electrode conductor and at least one dedicated ground electrode, said ground electrode being arranged at a predetermined distance of said antenna electrode conductor and extending along said antenna electrode conductor. 2. The capacitive occupant detection system as claimed in claim 1 , wherein said evaluation unit further comprises circuitry for compensating a capacitive current flowing from said antenna electrode conductor to said at least one dedicated ground electrode.3. The capacitive occupant detection system as claimed in claim 1 , wherein said antenna electrode conductor comprises at least one of a conductive wire and/or a conductive trace applied on a carrier material.4. An assembly of a seat heater and a capacitive occupant detection system according to claim 1 , wherein said seat heater comprises at least one heater conductor to be arranged in a seat and wherein said seat heater and said capacitive occupant detection system are arranged in said seat in such a way claim 1 , that said dedicated ground electrode is arranged between said heater conductor and said antenna electrode conductor.5. The assembly of a seat heater and a capacitive occupant detection system as claimed in claim 4 , wherein said heater conductor comprises at least one of a conductive wire or a conductive trace applied on a carrier material.6. The assembly of a seat heater and a capacitive occupant detection system as claimed in claim 4 , wherein said heater conductor and at least one of ...

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Номер записи: 30
15-08-2013 дата публикации

ELECTROSTATIC CAPACITANCE SENSOR AND METHOD FOR DETERMINING FAILURE OF ELECTROSTATIC CAPACITANCE SENSOR

Номер: US20130207677A1
Автор: Togura Takeshi
Принадлежит: FUJIKURA, LTD.

The disclosure has: a detection electrode () that detects an electrostatic capacitance; a shield electrode (); a shield drive circuit () that switches between a first electric potential and a second electric potential to apply the first or second electric potential to the shield electrode; a detection circuit () that outputs a detection signal depending on the electrostatic capacitance detected; and a determination circuit () that obtains a first detection signal and a second detection signal as the basis to determine whether an abnormality of the detection electrode () or the shield electrode is present or absent. The first detection signal depends on the electrostatic capacitance detected when the shield drive means () applies the first electric potential to the shield electrode (). The second detection signal depends on the electrostatic capacitance detected when the shield drive means () applies the second electric potential to the shield electrode. 1. An electrostatic capacitance sensor comprising:a detection electrode that detects an electrostatic capacitance between the detection electrode and an object;a shield electrode that is disposed in vicinity of the detection electrode;a shield drive means that switches between a first electric potential and a second electric potential different from the first electric potential to apply the first or second electric potential to the shield electrode;a detection means that outputs a detection signal depending on the electrostatic capacitance detected by the detection electrode; anda determination means that obtains a first detection signal and a second detection signal from the detection means as a basis to determine whether an abnormality of the detection electrode and/or the shield electrode is present or absent, the first detection signal depending on the electrostatic capacitance detected by the detection electrode when the shield drive means applies the first electric potential to the shield electrode, the second ...

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Номер записи: 31
22-08-2013 дата публикации

CAPACITANCE MEASUREMENT CIRCUIT AND METHOD FOR MEASURING CAPACITANCE THEREOF

Номер: US20130214798A1
Автор: Hong Jae-Surk, Lee Bang-Won, Moon Byung-Joon
Принадлежит: ATLab Inc.

Provided are a capacitance measurement circuit and method. In the capacitance measurement circuit and method, a control unit generates a control code a predetermined number of times according to designated rules regardless of the level of a sensing signal, and the control code is changed to measure a capacitance value when the level of the sensing signal corresponding to the generated control code is determined to be normal. Consequently, the measured capacitance value is hardly affected by noise and can be stably output. 1. A capacitance measurement circuit , comprising:a pulse signal generation unit configured to generate a pulse signal having a pulse width corresponding to a control code;a pulse signal transfer unit having a pad, and configured to delay the pulse signal according to a capacitance applied through the pad and output the delayed pulse signal as a delay pulse signal;a pulse signal detection unit configured to output a sensing signal by detecting the delay pulse signal; anda control unit configured to generate the control code a plurality of times according to designated rules, apply the generated control codes to the pulse signal generation unit, and determine whether or not to change the control code by making a determination on the plurality of sensing signals corresponding to the respective generated control codes.2. The capacitance measurement circuit of claim 1 , wherein the control unit generates the control code having the same value n times (n is a natural number) claim 1 , applies the generated control codes to the pulse signal generation unit claim 1 , and stores values of the sensing signals corresponding to the respective control codes generated n times.3. The capacitance measurement circuit of claim 2 , wherein the control unit increases and outputs the control code when a number of 0 is q or more (q is a natural number equal to or smaller than n) at the stored values of the plurality of sensing signals.4. The capacitance measurement ...

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Номер записи: 32
29-08-2013 дата публикации

USER INTERFACE HAVING UNIVERSAL SENSING ELECTRODE STRUCTURE

Номер: US20130221991A1
Автор: Campbell Robert B.
Принадлежит: TOUCHSENSOR TECHNOLOGIES, LLC

A universal sensor array for use with a user interface panel includes a first array of conductors separated from a second array of conductors by a dielectric substrate. Conductors of the first array cross over the conductors of the second array without touching. A control circuit detects stimuli proximate the conductors and provides respective control outputs in response to substantially simultaneous detection of stimuli proximate predetermined pairs of intersecting conductors and provides a null control output in response to detection of stimuli proximate other conductors or pairs of conductors. 1. An apparatus comprising:a first conductor array comprising a first dielectric substrate, a first plurality of conductors disposed on said first dielectric substrate, and a second dielectric substrate disposed on said first plurality of conductors;a second conductor array comprising a third dielectric substrate, a second plurality of conductors disposed on said third dielectric substrate, and a fourth dielectric substrate disposed on said second plurality of conductors; anda control circuit electrically coupled to each of said first plurality of conductors and said second plurality of conductors;wherein said second conductor array is disposed on said first conductor array such that individual ones of said first plurality of conductors cross individual ones of said second plurality of conductors;wherein said control circuit selectively provides excitation signals to individual ones of said first plurality of conductors and said second plurality of conductors;wherein said control circuit detects stimuli proximate individual ones of said first plurality of conductors and said second plurality of conductors; andwherein said control circuit provides a first control output in response to said control circuit substantially simultaneously detecting a stimulus proximate a predetermined one of said first plurality of conductors and a predetermined one of said second plurality of ...

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Номер записи: 33
05-09-2013 дата публикации

ELECTROSTATIC CAPACITANCE SENSOR

Номер: US20130229193A1
Автор: IBARA Nobuyuki, KAKIMOTO Katsumi, KISHIMOTO Shinichi, MORI Takeshi, NOMURA Masatoshi, OGIHARA Jun, Okada Takeshi, UEDA Hideki, YOSHIDA Hitoshi
Принадлежит: Panasonic Corporation

An electrostatic capacitance sensor includes a semiconductor substrate . A first fixing plate is joined to a one-side surface of the semiconductor substrate , and a second fixing plate is joined to other-side surface of the semiconductor substrate , whereby a space portion S is formed. Then, static electricity suppressing means for suppressing static electricity from being generated in the space portion S is provided in the electrostatic capacitance sensor 1. An electrostatic capacitance sensor , including:a semiconductor substrate in which a movable body having a movable electrode is formed,a first fixing plate joined to one surface of the semiconductor substrate,a second fixing plate joined to the other surface of the semiconductor substrate,a fixed electrode formed on the first fixing plate and arranged opposite to the movable electrode at an interval,wherein the first fixing plate is joined to one surface of the semiconductor substrate, and the second fixing plate is joined to the other surface of the semiconductor substrate, whereby a space portion is formed,wherein static electricity suppressing means for suppressing static electricity from being generated in the space portion is provided in the electrostatic capacitance sensor.2. The electrostatic capacitance sensor according to claim 1 , wherein the static electricity suppressing means is a metal film formed on at least one of a spot of an inner surface of the first fixing plate claim 1 , the spot being other than a spot on which the fixed electrode is formed claim 1 , and of an inner surface of the second fixing plate claim 1 , and the metal film is electrically insulated from the fixed electrode claim 1 , and is electrically connected to the movable body.3. The electrostatic capacitance sensor according to claim 1 , wherein the movable body is formed without using an insulator.4. The electrostatic capacitance sensor according to claim 2 , wherein the metal film is formed on a recessed portion formed on ...

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Номер записи: 34
12-09-2013 дата публикации

SENSOR UNIT, INPUT DEVICE, AND ELECTRONIC APPARATUS

Номер: US20130234734A1
Автор: Hasegawa Hayato, IIDA Fumihiko, Itaya Takashi, Kano Toshio, Kawaguchi Hiroto, TANAKA Takayuki, Tsukamoto Kei
Принадлежит: SONY CORPORATION

A sensor unit is provided and includes a first substrate, first and second electrodes, an input portion disposed so that a gap exists between the substrate and the input portion, a plurality of first structures disposed in the gap and extending at least partially between the first substrate and the input portion, and a second insulating structure disposed on a side of the first structures that is away from the input portion, or between adjacent first structures. The sensor unit is configured to detect a change in capacitance between the first and second electrodes upon a change in position of the input portion relative to the first substrate. 1. A sensor unit comprising:a first substrate;first and second electrodes;an input portion disposed so that a gap exists between the substrate and the input portion;a plurality of first structures disposed in the gap and extending at least partially between the first substrate and the input portion; anda second insulating structure disposed on a side of the first structures that is away from the input portion, or between adjacent first structures;wherein the sensor unit is configured to detect a change in capacitance between the first and second electrodes upon a change in position of the input portion relative to the first substrate.2. The sensor unit according to claim 1 , wherein the first structures are deformable.3. The sensor unit according to claim 1 , wherein the first electrodes intersect with the second electrodes to form a plurality of capacitive elements.4. The sensor unit according to claim 1 , further comprising a reference electrode spaced a distance apart from the first electrodes on a side of the input portion facing the gap.5. The sensor unit according to claim 4 , wherein the sensor unit is configured such that when the reference electrode is moved closer to the first substrate a capacitance between the first electrodes and the reference electrode increases claim 4 , and the capacitance between the first ...

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Номер записи: 35
12-09-2013 дата публикации

OCCUPANT SENSOR DEVICE

Номер: US20130234735A1
Автор: Nakagawa Hajime
Принадлежит: Denso Corporation

An occupant sensor device includes a sensor body unit disposed in a base part of a seat in a vehicle, and an occupant detection device. The sensor body unit is divided into at least two parts, such as a first sensor part and a second sensor part, where the first sensor part is positioned in front of the second sensor part. Based on a capacitance between the sensor body unit and a vehicle body, the occupant detection device detects an occupant type of an occupant that is seated on the seat. In particular, the occupant detection unit is able to detect the occupant type based on a first capacitance provided by the first sensor part, a second capacitance provided by the second sensor part, and a total capacitance, which is a total of the first capacitance and the second capacitance. 1. An occupant sensor device disposed in a vehicle comprising:a sensor body unit disposed in a base part of a seat, wherein the sensor body unit is divided into at least two parts along at least one of two axes, such that a first sensor part of the sensor body unit is positioned in front of a second sensor part; andan occupant detection device detecting an occupant type of an occupant seated on the seat based on a capacitance between the sensor body unit and a vehicle body, whereinthe occupant detection unit detects the occupant type based on a first capacitance, a second capacitance, and a total capacitance, which is a total of the first capacitance and the second capacitance, the first capacitance is a capacitance between the first sensor part and the vehicle body, and the second capacitance is a capacitance between the second sensor part and the vehicle body.2. The occupant sensor device of claim 1 , whereinthe occupant detection unit has a total threshold for determining the occupant type based on the total capacitance, and a partial threshold for determining the occupant type based on at least one of the first capacitance and the second capacitance,the occupant type is determined as an ...

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Номер записи: 36
12-09-2013 дата публикации

OCCUPANT DETECTION DEVICE

Номер: US20130234736A1
Автор: Ootaka Kouji
Принадлежит: Denso Corporation

An occupant detection device has an electrostatic sensor and a reference sensor device, which are disposed in a seat of a vehicle. The electrostatic sensor includes a detection electrode for generating a capacitance in a space defined by itself and a vehicle body. The reference sensor device has the same detection characteristic as the electrostatic sensor, and is arranged such that it is not affected by a liquid. An occupant determination unit of the detection device determines a presence of an occupant on the seat based on an output of the electrostatic sensor. A determination standard change unit of the detection device changes an occupant determination threshold based on an output of the reference sensor device, where the occupant determination threshold is used by the occupant determination unit for determining the presence of the occupant. 1. An occupant detection device comprising:an electrostatic sensor disposed in a seat and having a detection electrode for generating a capacitance with a vehicle body;an occupant determination unit determining a presence of an occupant at a seat based on an output of the electrostatic sensor;a reference sensor device disposed in the seat and having a same detection characteristic as the electrostatic sensor for detecting humidity, wherein the reference sensor device is positioned such that it is not affected by a liquid; anda determination standard change unit changing an occupant determination threshold based on an output of the reference sensor device, the occupant determination threshold being used by the occupant determination unit for determining the presence of the occupant.2. The occupant detection device of claim 1 , wherein the reference sensor device is disposed in an occupant detection ECU that includes the occupant determination unit.3. The occupant detection device of claim 1 , wherein the reference sensor device has two electrodes that face each other with a gap interposed therebetween claim 1 , and outputs ...

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Номер записи: 37
12-09-2013 дата публикации

SIGNAL SENSING CIRCUIT

Номер: US20130234737A1
Автор: CHANG CHIN-FU
Принадлежит: EGALAX_EMPIA TECHNOLOGY INC.

A signal sensing circuit is provided. The signal sensing circuit comprises a first current-to-voltage circuit, a second current-to-voltage and an impedance shifting circuit. The first current-to-voltage circuit converts a first input current into a first voltage that is directly proportional to a first impedance. The second current-to-voltage circuit converts a second input current into a second voltage that is directly proportional to a second impedance. The impedance shifting circuit generates a third voltage according to the first voltage, wherein the first impedance/the second impedance=K(first voltage/third voltage), where K is a real number. 1. A signal sensing circuit comprising:a first current-to-voltage circuit for converting a first input current into a first voltage that is directly proportional to a first impedance;a second current-to-voltage for converting a second input current into a second voltage that is directly proportional to a second impedance; andan impedance shifting circuit for generating a third voltage according to the first voltage,wherein the first impedance/the second impedance=K(first voltage/third voltage), where K is a real number.2. The signal sensing circuit of claim 1 , wherein the first current-to-voltage circuit and the second current-to-voltage circuit reside on separate integrated circuits claim 1 , and the first impedance and the second impedance are designed to have the same impedance value.3. The signal sensing circuit of claim 2 , wherein a first portion of the impedance shifting circuit and the first current-to-voltage circuit reside on the same integrate circuit claim 2 , and a second portion of the impedance shifting circuit and the second current-to-voltage circuit reside on the same integrate circuit.41. The signal sensing circuit of claim 1 , wherein K equals .5. A signal sensing circuit comprising: a first input resistor for receiving a first voltage;', 'a first inverting closed-loop amplifier including a first ...

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Номер записи: 38
12-09-2013 дата публикации

SENSING STRUCTURE OF TOUCH PANEL

Номер: US20130234738A1
Автор: Herman
Принадлежит: SITRONIX TECHNOLOGY CORP.

The present invention relates to a sensing structure of touch panel, which comprises a plurality of electrode groups disposed on a substrate. The substrate has a first side and a second side. Each electrode group comprises a first external electrode, a second external electrode, a plurality of internal electrodes, and a plurality of wires. The first external electrode is disposed on a first side; the second external electrode is disposed on the second side; the plurality of internal electrodes are disposed between the first external electrode and the second external electrode; and the plurality of wires are disposed on both sides of the electrode group alternately. Thereby, by disposing the first external electrode, the second external electrode, and the internal electrodes, all being zigzag, the disposable number of electrodes in each electrode group is increased. Accordingly, the sensitivity of touch sensing for the sensing structure of touch panel is enhanced. 1. A sensing structure of touch panel , comprising a plurality of electrode groups disposed on a substrate , said substrate having a first side and a second side corresponding to each other , and each said electrode group comprising:a first external electrode, disposed on said first side, having a first external main electrode and a first external sub electrode, said first external sub electrode connected to one side of said first external main electrode, and said first external sub electrode being zigzag and facing said second side;a second external electrode, disposed on said second side, having a second external main electrode and a second external sub electrode, said second external sub electrode connected to one side of said second external main electrode, and said second external sub electrode being zigzag and facing said first side; anda plurality of internal electrode, disposed between said first external electrode and said second external electrode, having an internal main electrode, a first ...

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Номер записи: 39
12-09-2013 дата публикации

SINGLE-LAYER TWO-DIMENSIONAL TOUCH SENSOR AND TOUCH CONTROL TERMINAL

Номер: US20130234739A1
Автор: DENG GENGCHUN
Принадлежит: SHENZHEN HUIDING TECHNOLOGY CO., LTD.

A single-layer two-dimensional touch sensor includes a substrate and a flexible printed circuit board. First and second electrodes forming capacitor structures are disposed on the substrate. The first electrodes are arranged in a first direction. A group of second electrodes is disposed between each two adjacent first electrodes. The second electrodes are arranged in a head-to-tail meshed fashion in a second direction perpendicular to the first direction. In each group of second electrodes, lead lines of all second electrodes directly lead out to the flexible printed circuit board, and lead lines of the second electrodes at the same place in different group are short-connected at a node on the flexible printed circuit board. This touch sensor is a mutual capacitance structure which supports multi-point detection and increases the detection accuracy. In addition, no jumper wire is required on the substrate, which reduces the requirements of the fabrication process. 1. A single-layer two-dimensional touch sensor comprising a substrate and a flexible printed circuit board , wherein a plurality of first electrodes and a plurality of second electrodes are disposed on the substrate , the first electrodes and the second electrodes form capacitor structures , the plurality of first electrodes is arranged in a first direction , a group of second electrodes is disposed between each two adjacent first electrodes , the second electrodes are arranged in a second direction in a head-to-tail meshed fashion , the second direction is perpendicular to the first direction , a gap is formed at a meshing location of the second electrodes; in each group of second electrodes , lead lines of all second electrodes directly lead out to the flexible printed circuit board , and lead lines of the second electrodes at the same place in different group are short-connected at a node on the flexible printed circuit board.2. The single-layer two-dimensional touch sensor according to claim 1 , ...

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Номер записи: 40
12-09-2013 дата публикации

Signal sensing circuit

Номер: US20130234875A1
Автор: Po-Chuan Lin
Принадлежит: Egalax Empia Technology Inc

A signal sensing circuit converts a received current input into a voltage output and provides the voltage output to an analog-to-digital converter (ADC) to generate a digital output signal. The voltage output is associated with a circuit having a first reference impedance, and a reference voltage of the ADC is associated with a circuit having a second reference impedance, wherein the circuit having the first reference impedance and the circuit having the second reference impedance are formed by the same material, so that the ratio between the changes in the current input and the changes in the value of the digital output signal is a constant.

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Номер записи: 41
19-09-2013 дата публикации

SENSOR ASSEMBLY FOR DETECTING AN APPROACHING AND/OR CONTACTING OBJECT, AND METHOD FOR ASSEMBLING A SENSOR ASSEMBLY

Номер: US20130241576A1
Автор: Ihle Judith, Rein Achim, Senninger Christian, Vor Der Brüggen Jens, Weiss Oliver, Wiesener Oliver
Принадлежит: Schreiner Group GmbH & Co. KG

A sensor assembly and method for producing a sensor assembly for detecting an approaching and/or contacting object. The sensor assembly includes at least one sensor support surface having a first flat side and a second flat side, a proximity and/or contact sensor, which is connected to the first flat side and/or to the second flat side of the sensor support surface, a decoration support medium having a first support flat side and a second support flat side, and a decoration layer, which is connected to the first support flat side and/or to the second support flat side of the decoration support medium and/or is an integral part of the decoration support medium. The decoration support medium includes a glass or plastic film or panel which is back-molded on the first support flat side thereof and/or on the second support flat side, directly or indirectly, using an injection molding material. 1. A sensor assembly for detecting an approaching and/or contacting object , comprising at least:a sensor support surface with a first flat side and a second flat side,a proximity and/or contact sensor, which is connected to the first flat side and/or the second flat side of the sensor support surface,a decoration support medium with a first support flat side and a second support flat side,a decoration layer, which is connected to the first support flat side and/or the second support flat side of the decoration support medium and/or is an integral part of the decoration support medium,wherein the decoration support medium comprises a glass or plastic film or panel, which is back-moulded on the first support flat side thereof and/or the second support flat side, directly or indirectly, using an injection-moulding material.2. The sensor assembly according to claim 1 , wherein the sensor support surface and the decoration support medium are partially connected to each other claim 1 , directly or indirectly claim 1 , along one of their flat sides and support flat sides.3. The sensor ...

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Номер записи: 42
19-09-2013 дата публикации

CAPACITANCE TYPE SENSOR

Номер: US20130241578A1
Автор: Mori Hiroyuki, Nakagawa Hajime, Satake Masayoshi
Принадлежит: Denso Corporation

A capacitance type sensor includes a detection electrode, a reference electrode, and a sub-reference electrode for distinguishingly detecting a detection object. The sub-reference electrode has a reference voltage applied thereto and is displaceable relative to the detection electrode due to a pressure exerted from the detection object. A voltage application device applies a detection voltage to form an electric field in a space defined with the reference electrode device. A capacitance detector of the sensor detects a first capacitance and a second capacitance, and a detection unit of the sensor distinguishingly detects the detection object based on the first capacitance and the second capacitance. The first capacitance is measured between the detection electrode and the reference electrode, and the second capacitance is measured between the detection electrode and the sub-reference electrode. 1. A capacitance type sensor comprising:a detection electrode arranged to face a detection object;a reference electrode provided with a reference electric potential;a sub-reference electrode provided with the reference electric potential and disposed in a mutually displaceable manner relative to the detection electrode, wherein the sub-reference electrode and the detection electrode are displaced relative to one another due to a pressure exerted from the detection object;a voltage application device applying a detection voltage to form an electric field in a space defined with the reference electrode;an electric current detector detecting an electric current in the detection electrode caused by the detection voltage from the voltage application device;a capacitance detector detecting, based on the detection voltage and the electric current detected by the electric current detector, a first capacitance between the detection electrode and the reference electrode and a second capacitance between the detection electrode and the sub-reference electrode; anda detection unit ...

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Номер записи: 43
19-09-2013 дата публикации

INPUT DEVICE

Номер: US20130241579A1
Автор: TAKAHASHI Akihiro
Принадлежит: ALPS ELECTRIC CO., LTD.

An input device includes a capacitive sensor, which detects an operator's approach or touch and an operating body which is movably supported with respect to the capacitive sensor. At least a portion of the operating body has a conductive material portion exposed to a surface, a capacitive coupling portion opposing the conductive material portion regardless of the movement of the operating body is provided on the side unmovable with respect to the capacitive sensor, and the capacitive coupling portion is grounded. 1. An input device , comprising:a capacitive sensor which detects an operator's approach or touch; andan operating body which is movably supported with respect to the capacitive sensor,wherein the operating body surrounds the capacitive sensor,wherein at least a portion of the operating body has a conductive material portion exposed to a surface, andwherein a base member unmovable with respect to the capacitive sensor has a capacitive coupling portion opposing the conductive material portion and the capacitive coupling portion is grounded.2. The input device according to claim 1 ,wherein the capacitive sensor is attached to the base member, the operating body has a bottomed cylinder shape having a top side portion and a lateral side portion, and the top side portion and the capacitive sensor oppose each other, andwherein the conductive material portion is disposed on the lateral side portion of the operating body, a clearance gap portion is formed between the lateral side portion and the base member, and the capacitive coupling portion is provided on the base member so as to face the clearance gap portion.3. The input device according to claim 2 ,wherein the base member has a cylindrical portion, the outer peripheral surface of the cylindrical portion and the inner peripheral surface of the lateral side portion oppose each other, and the capacitive coupling portion is provided along the outer peripheral surface of the cylindrical portion.4. The input device ...

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Номер записи: 44
26-09-2013 дата публикации

OCCUPANCY DETECTION FOR FURNITURE

Номер: US20130247302A1
Автор: CHACON RYAN EDWARD, Madadi Avinash, ROHR WILLIAM ROBERT
Принадлежит: L & P Properly Management Company

A system and method for incorporating occupancy-detecting technology into furniture is provided. More particularly, the invention relates to detecting occupancy using a detection pad coupled a portion of a bed. The detection pad may include an aluminized polymer material, a metalized and/or conductive fabric, an aluminum sheet, a metal screen, an aluminum tape, a wire grid, or other metalized material or fabric. A controller determines the corresponding response based on single-occupancy or dual-occupancy detection by one or more detection pads. A processor receives information regarding changes in capacitance and determines when a change in voltage satisfies a threshold. Based on a determination of occupancy, or lack thereof, a variety of corresponding features of the adjustable bed may be activated. 1. An adjustable bed , comprising:a mattress support that comprises a plurality of support panels, at least one of said support panels movable relative to the other ones of said support panels to thereby adjust the bed;a mattress resting on top of the mattress support, said mattress having a covering material disposed over at least a top surface of the mattress;at least one capacitive component coupled to the bed, wherein the at least one capacitive component is adapted to have a voltage based on proximity of an object to the at least one capacitive component, and further wherein the at least one capacitive component comprises at least one detection pad coupled to at least one of the plurality of support panels; anda processor coupled to the at least one capacitive component, the processor adapted to receive information provided by the at least one capacitive component and to determine that a change in voltage satisfies a threshold.2. The bed of claim 1 , wherein the at least one detection pad is coupled to the processor with at least one coaxial cable.3. The bed of claim 2 , wherein the processor receives information directly from the at least one detection pad.4. The ...

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Номер записи: 45
26-09-2013 дата публикации

CAPACITIVE LOAD TESTING DEVICE OF POWER SUPPLY

Номер: US20130249567A1
Автор: BAI YUN, TONG SONG-LIN, YANG FU-SEN
Принадлежит: HON HAI PRECISION INDUSTRY CO., LTD.

A device for testing capacitive loads of a power supply includes a controller, a power supply switching circuit, a capacitive load switching circuit, and a current sampling circuit. The power supply switching circuit selects one of output voltages of the power supply to be electronically connected to the capacitive load switching circuit and the current sampling circuit. The current sampling circuit samples an output current of one output of the power supply selected by the controller. The controller turns on and off switches of the capacitive load switching circuit for matching an output current of the power supply with a reference current until the output current equals to the reference current. The controller outputs a total magnitude of the capacitive loads. 1. A device for testing a largest capacitive load value of a power supply , the device comprising:a controller electronically connected to the power supply, a power supply switching circuit, a capacitive load switching circuit, a current sampling circuit;wherein the power supply switching circuit selects one output of the power supply to be electronically connected to the capacitive load switching circuit and the current sampling circuit, causing the power supply switching circuit to be electronically connected to the power supply, the capacitive load switching circuit, and the current sampling circuit;wherein the capacitive load switching circuit comprises a plurality of capacitive loads;wherein the current sampling circuit cooperates with the controller to sample a current of the one output of the power supply; andwherein the controller controls the capacitive load switching circuit to selectively provide at least one capacitive load of the plurality of capacitive loads to be electronically connected to the power supply in parallel, and the controller compares the output current with a reference current until a value of the output current equaling to a value of the reference current is reached, and the ...

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Номер записи: 46
26-09-2013 дата публикации

CABINET TOUCH CONTROL

Номер: US20130249568A1
Автор: Botten Peter
Принадлежит:

Provided is a method and an apparatus for controlling an electric device. The apparatus includes a cabinet defining a recess, and a sensor disposed within said recess for sensing the presence of a foreign object in close proximity to the sensor. A veneer at least partially conceals the sensor disposed within said recess from view when observed from an ambient environment of the cabinet. A controller is responsive to a signal transmitted by the sensor indicative of the presence of the foreign object adjacent to the sensor to transmit a control signal for controlling operation of the electric device operatively connected to communicate with the controller. 1. An apparatus for controlling an electric device , the apparatus comprising:a cabinet defining a recess;a sensor disposed within said recess for sensing the presence of a foreign object in close proximity to the sensor;a veneer at least partially concealing the sensor disposed within said recess from view when observed from an ambient environment of the cabinet; anda controller that is responsive to a signal transmitted by the sensor indicative of the presence of the foreign object adjacent to the sensor to transmit a control signal for controlling operation of the electric device operatively connected to communicate with the controller.2. The apparatus of claim 1 , wherein the sensor is a capacitive sensor that senses a capacitance change resulting from placement of the foreign object in close proximity to the sensor.3. The apparatus of claim 1 , wherein the cabinet is a portion of a piece of furniture.4. The apparatus of claim 3 , wherein the recess is formed in an arm rest portion of the piece of furniture on which a user is to sit.5. The apparatus of claim 3 , wherein the recess is formed in a base portion of a lamp. 1. Field of the InventionThis application relates generally to capacitive sensors and, in particular, to a cabinet, piece of furniture or other object including an integrated capacitive sensor for ...

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Номер записи: 47
26-09-2013 дата публикации

Sensor and Method for Detecting an Object

Номер: US20130249570A1
Автор: Vater Jochen, Voelkel Hardi
Принадлежит: PEPPERL + FUCHS GMBH

The invention relates to a sensor for detecting an object. The sensor includes a probe electrode for forming a measuring capacitance with the object to be detected, a charging generator for generating an alternating charging voltage, wherein the probe electrode is charged by means of the alternating charging voltage, an amplifier for amplifying a voltage across the measuring capacitance, wherein the amplifier includes a first supply connection and a second supply connection, electronic means for processing signals outputted at an output of the amplifier to form at least one output signal and at least one sensor output for outputting the at least one output signal. According to the invention, the sensor is characterized in that a DC voltage in the form of a second supply voltage is connectable to the second supply connection, and that a first supply voltage having an AC voltage portion is connectable to the first supply connection, wherein a supply voltage generator is available for generating the DC voltage portion. The invention also relates to a method for detecting an object. 1. A sensor for detecting an object , comprising:{'b': 10', '1', '5, 'a probe electrode () for forming a measuring capacitance (C) with the object () to be detected,'}{'b': 30', '3', '10', '3, 'a charge generator () for generating an alternating charging voltage (U), wherein the probe electrode () is charged by the alternating charging voltage (U),'}{'b': 1', '1', '2, 'an amplifier (A) for amplifying a voltage across the measuring capacitance (C), wherein the amplifier (A) includes a first supply connection (A) and a second supply connection (A),'}{'b': '20', 'a processing component () for processing signals that are outputted at an output of the amplifier (A) to form at least one output signal, and'}{'b': '50', 'at least one sensor output () for outputting the at least one output signal, wherein'}{'b': 2', '2, 'a second supply voltage (U) in the form of a DC voltage is connected to the ...

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Номер записи: 48
03-10-2013 дата публикации

METHOD AND DEVICE FOR MEASURING SIGNALS

Номер: US20130257458A1
Автор: CHANG CHIN-FU
Принадлежит: EGALAX_EMPIA TECHNOLOGY INC.

Sinusoidal drive is used, and a coefficient table for a plurality of predetermined phases is established, wherein each predetermined phase is designated with a coefficient. A sinusoidal wave is measured at the plurality of predetermined phases of each half cycle to produce measured signals, and each of the measured signals is multiplied with the coefficient corresponding to the phase at which the signal is measured to produce a weighted measured signal. Then, the weighted measured signals are summed to produce a complete measured signal. 1. A method for measuring signals comprising:receiving a sinusoidal wave;measuring signals from the sinusoidal wave at a plurality of predetermined phases of at least a cycle of the sinusoidal wave;producing a weighted measured signal of the at least one cycle based on a product generated by multiplying each measured signal of the at least one cycle with the sine value of the predetermined phase at which the particular signal was measured; andsumming all of the weighted measured signals of the at least one cycle to produce a complete measured signal.2. The method of claim 1 , further comprising:providing the sinusoidal wave at one or a set of driving conductive strips of a touch sensor; andreceiving the sinusoidal wave by one of a plurality of sensing conductive strips in the touch sensor intersecting with the one or the set of driving conductive strips provided with the sinusoidal wave, the one of the plurality of sensing conductive strips receiving the sinusoidal wave through capacitive coupling with the one or the set of driving conductive strips provided with the sinusoidal wave.3. The method of claim 1 , further comprising:converting each measured signal from an analog measured signal to a digital measured signal, wherein the signals measured from the sinusoidal wave are in an analog form, and each weighted measured signal is a digital product of a digital measured signal multiplied by a digital sine value.4. The method of ...

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Номер записи: 49
10-10-2013 дата публикации

CAPACITIVE TOUCH KEY AND THE OPERATING METHOD THEREOF

Номер: US20130265062A1
Автор: CHANG Chia-Ming, WANG CHI-HAO
Принадлежит:

A capacitive touch key is disclosed. The capacitive touch key includes a capacitive key, generating a first capacitance value when a user is close to the capacitive key; a mechanical key connected with the capacitive key; a capacitor connected with the mechanical key and having a second capacitance value; and a processing unit connected with the capacitive key, wherein the processing unit detects the first capacitance value when the mechanical key is not pressed by a user, and the processing unit detects the first capacitance value and the second capacitance value when the mechanical key is pressed by a user. 1. A capacitive touch key , comprising:a capacitive key, generating a first capacitance value when a user is close to the capacitive key;a mechanical key, connected with the capacitive key;a capacitor, connected with the mechanical key and having a second capacitance value; anda processing unit, connected with the capacitive key,wherein the processing unit detects the first capacitance value when the mechanical key is not pressed by the user, and the processing unit detects the first capacitance value and the second capacitance value when the mechanical key is pressed by the user.2. The capacitive touch key according to claim 1 , wherein the second capacitance value is larger than the first capacitance value.3. The capacitive touch key according to claim 1 , wherein when the mechanical key is pressed by the user claim 1 , the mechanical key detects that the first capacitance value and the second capacitance value are connected in parallel.4. A method of operating a capacitive touch key claim 1 , wherein the capacitive touch key comprises a capacitive key and a mechanical key claim 1 , the method comprising the steps of:detecting the variance of a first capacitance value generated when a user is close to the capacitive key;providing a first reaction;detecting the variance of a second capacitance value generated when the user presses the mechanical key; ...

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Номер записи: 50
10-10-2013 дата публикации

SELF TEST OF MEMS ACCELEROMETER WITH ASICS INTEGRATED CAPACITORS

Номер: US20130265070A1
Автор: Kleks Jonathan Adam, Opris Ion, Seng Justin
Принадлежит: Fairchild Semiconductor Corporation

An apparatus comprises a micro-electromechanical system (MEMS) sensor including a first capacitive element and a second capacitive element and an integrated circuit (IC). The IC includes a switch network circuit and a capacitance measurement circuit. The switch network circuit is configured to electrically decouple the first capacitive element of the MEMS sensor from a first input of the IC and electrically couple the second capacitive element to a second input of the IC. The capacitance measurement circuit can be configured to measure capacitance of the second capacitive element of the MEMS sensor during application of a first electrical signal to the decoupled first capacitive element. 1. An apparatus comprising:a micro-electromechanical system (MEMS) sensor including a first capacitive element and a second capacitive element; and a switch network circuit configured to electrically decouple the first capacitive element of the MEMS sensor from a first input of the IC and electrically couple the second capacitive element to a second input of the IC; and', 'a capacitance measurement circuit configured to measure capacitance of the second capacitive element of the MEMS sensor during application of a first electrical signal to the decoupled first capacitive element., 'an integrated circuit (IC), including2. The apparatus of claim 1 ,wherein the switch network is configured to electrically decouple the second capacitive element of the MEMS sensor from the IC and electrically couple the first capacitive element to the IC, andwherein the capacitance measurement circuit is configured to measure capacitance of the first capacitive element of the MEMS sensor during application of a second electrical signal to the decoupled second capacitive element.3. The apparatus of claim 1 , including a test circuit configured to:apply a first square wave signal to the first decoupled capacitive element,apply a second square wave signal to an external circuit node common to the first ...

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Номер записи: 51
17-10-2013 дата публикации

SYSTEMS FOR PROVIDING ELECTRO-MECHANICAL SENSORS

Номер: US20130271159A1
Автор: Ponce Wong Ruben, Posner Jonathan, Santos Veronica J.
Принадлежит:

Systems for providing electro-mechanical sensors are provided. In some embodiments, a system for providing an electro-mechanical sensor comprising: a flexible material forming at least a first channel and a second channel, wherein the first channel includes a first plate region and the second channel forms a second plate region that is substantially aligned with the first plate region; and an electrically conductive fluid that fills the first channel and the second channel. 1. A system for providing an electro-mechanical sensor comprising:a flexible material forming at least a first channel and a second channel, wherein the first channel includes a first plate region and the second channel forms a second plate region that is substantially aligned with the first plate region; andan electrically conductive fluid that fills the first channel and the second channel.2. The system of claim 1 , wherein the first plate region and the second plate region are arranged so that the first plate region and the second plate region move relative to one another when a force is applied to the flexible material.3. The system of claim 1 , wherein the flexible material forms a compressible region between the first plate region and the second plate region.4. The system of claim 3 , wherein the compressible region is filled with a softer substance than the flexible material.5. The system of claim 4 , wherein the softer substance is air.6. The system of claim 1 , wherein the first channel and the second channel form a five by five array of taxels.7. The system of claim 1 , further comprising a circuit that is responsive to a capacitance formed by the first plate region and the second plate region.8. The system of claim 7 , wherein the circuit determines an output voltage corresponding to the capacitance formed by the first plate region and the second plate region.9. The system of claim 8 , wherein the output voltage is converted to a digital signal by an analog-to-digital-converter.10. The ...

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Номер записи: 52
17-10-2013 дата публикации

REDUCING BENDING EFFECTS IN TOUCH SENSOR DEVICES

Номер: US20130271160A1
Автор: Dattalo Tracy Scott, Solven Derek
Принадлежит: SYNAPTICS INCORPORATED

A capacitive image sensor for detecting an input object includes a first substrate and a second substrate. A compressible region is defined between the first substrate and the second substrate. The first substrate is deflectable towards the second substrate. A transmitter electrode, receiver electrode, and bending effect electrode are disposed on the first substrate. The bending effect electrode is disposed between the transmitter electrode and receiver electrode and is configured to reduce a change in resulting signals detected from the receiver electrode caused by deflection of the first substrate towards the second substrate. 1. A capacitive image sensor for detecting an input object , comprising:a first substrate having a first side;a second substrate displaced from the first substrate to define a compressible region between the first substrate and the second substrate, wherein the first substrate is deflectable relative to the second substrate between a first position in which the compressible region has a first thickness and a second position in which the compressible region has a second thickness that is less than the first thickness;a transmitter electrode disposed on the first substrate;a receiver electrode disposed on the first substrate; anda bending effect electrode disposed on the first substrate and disposed between the transmitter electrode and the receiver electrode,wherein when the first substrate is in the first position, a plurality of field lines extends from the transmitter electrode through the compressible region and terminates on the bending effect electrode, and when the first substrate is in the second position, the plurality of field lines extends from the transmitter electrode through the compressible region and terminates on the second substrate.2. The capacitive image sensor of claim 1 , wherein the compressible region is an air gap.3. The capacitive image sensor of claim 1 , wherein the second substrate is a ground plane.4. The ...

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Номер записи: 53
17-10-2013 дата публикации

REDUCING BENDING EFFECTS IN TOUCH SENSOR DEVICES

Номер: US20130271161A1
Автор: Dattalo Tracy Scott, Solven Derek
Принадлежит: SYNAPTICS INCORPORATED

A capacitive image sensor for detecting an input object includes a first substrate and a second substrate. A compressible region is defined between the first substrate and the second substrate. The first substrate is deflectable towards the second substrate. A transmitter electrode, receiver electrode, and bending effect electrode are disposed on the first substrate. The bending effect electrode is disposed between the transmitter electrode and receiver electrode and is configured to reduce a change in resulting signals detected from the receiver electrode caused by deflection of the first substrate towards the second substrate. 1. A capacitive image sensor for detecting an input object , comprising:a first substrate having a first side;a second substrate displaced from the first substrate to define a compressible region between the first substrate and the second substrate, wherein the first substrate is deflectable relative to the second substrate between a first position in which the compressible region has a first thickness and a second position in which the compressible region has a second thickness that is less than the first thickness;a transmitter electrode disposed on the first substrate;a receiver electrode disposed on the first substrate; anda bending effect electrode disposed on the first substrate and disposed between the transmitter electrode and the receiver electrode,wherein when the first substrate is in the first position, a plurality of field lines extends from the transmitter electrode through the compressible region and terminates on the bending effect electrode, and when the first substrate is in the second position, the plurality of field lines extends from the transmitter electrode through the compressible region and terminates on the second substrate.2. The capacitive image sensor of claim 1 , wherein the compressible region is an air gap.3. The capacitive image sensor of claim 1 , wherein the second substrate is a ground plane.4. The ...

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Номер записи: 54
24-10-2013 дата публикации

SENSOR ARRANGEMENT AND METHOD FOR OPERATION OF A SENSOR ARRANGEMENT

Номер: US20130278277A1
Автор: Trattler Peter
Принадлежит: ams AG

A sensor arrangement, in particular for a non-contacting measurement, comprises a signal generator (SRC) which is connected to a first electrode (EL). A first detector (Det) is connected to the first electrode (EL), and is designed for a capacitive measurement by means of the first electrode (EL). A second detector (Det) is connected to a second electrode (EL) and is designed to use the first and the second electrodes (EL, EL) to carry out a capacitive measurement. A method for operation of the sensor arrangement is likewise specified. 1. A sensor arrangement , in particular for contactless measurement , comprising:a signal generator, which is connected to a first electrodes;a first detector, which is connected to the first electrode and which is designed for a capacitive measurement by means of the first electrode; anda second detector, which is connected to a second electrode and is designed to perform a capacitive measurement by means of the first and second electrodes.2. The sensor arrangement according to claim 1 , wherein the first detector is designed to measure a first signal at the first electrode claim 1 ,wherein the first signal is indicative of a capacitive coupling of an object to the first electrode, andwherein the second detector is designed to measure a second signal at the second electrode, wherein the second signal is indicative of a capacitive coupling of an object to the first and second electrodes.3. The sensor arrangement according to or claim 1 , wherein the first detector is designed to measure claim 1 , by means of a reference signal claim 1 , whether the signal generator is connected to a ground potential.4. The sensor arrangement according to claim 1 , wherein the first and second detectors each comprise at least one detection amplifier claim 1 ,wherein the first signal and a first reference signal can be supplied at the at least one detection amplifier of the first detector, and which detection amplifier provides a first detection signal ...

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Номер записи: 55
31-10-2013 дата публикации

On-Chip Resistor Calibration in Semiconductor Devices

Номер: US20130285679A1
Автор: Chien Chin-Ming, Marholev Bojko, Zolfaghari Alireza
Принадлежит:

According to one disclosed embodiment, an on-chip resistor calibration circuit includes an RC oscillator having a test resistor and a precision capacitor as elements, a counter, and a reference clock. In one embodiment, an RC oscillator generates a waveform having a period dependent upon the resistance of the test resistor and the capacitance of the precision capacitor. In such an embodiment, a counter and a reference clock may be configured to measure the period of the waveform. Using a pre-determined capacitance of the precision capacitor, a resistance of the test resistor may be determined. In another embodiment, an RC oscillator generates first and second waveforms through use of an additional capacitor that can be switched in and out of the RC oscillator circuit. Using a pre-determined capacitance of the precision capacitor, an RC product of the test resistor and the additional capacitor may be determined. 120-. (canceled)21. An on-chip calibration system comprising:a resistor-capacitor (RC) oscillator on a semiconductor die, said RC oscillator including a test resistor and a capacitor;a counter fabricated on said semiconductor die, said counter configured to receive an output provided by said RC oscillator as a first input;said on-chip calibration system configured to determine a resistance of said test resistor using said first input to said counter.22. The on-chip calibration system of claim 21 , wherein said output of said RC oscillator comprises a period substantially proportional to a product of said resistance and a pre-determined capacitance of said capacitor.23. The on-chip calibration system of claim 21 , wherein said capacitor comprises a metal-insulator-semiconductor (MIS) capacitor.24. The on-chip calibration system of claim 21 , wherein said capacitor comprises a metal-insulator-semiconductor (MIS) varactor.25. The on-chip calibration system of claim 21 , wherein said capacitor comprises a metal-oxide-semiconductor (MOS) varactor.26. The on-chip ...

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Номер записи: 56
07-11-2013 дата публикации

SENSOR UNIT FOR REMOTELY ACTUATING A VEHICLE DOOR, VEHICLE DOOR HAVING THE SENSOR UNIT AND METHOD OF PRODUCING THE SENSOR UNIT

Номер: US20130293245A1
Автор: Gunreben Andre, Kuhnen Thorsten, Wuerstlein Holger
Принадлежит:

A capacitive sensor unit is not susceptible to failure and remotely actuates a door of a vehicle. The sensor unit contains an electrode assembly having an elongated sensor electrode and a supply line for electrically connecting the sensor electrode to an evaluation unit. The supply line is surrounded by a shield. An additional ground conductor, which is electrically conductively connected to the shield over the entire length of the supply line, is connected in parallel to the supply line. 1. A capacitive sensor unit for contactlessly actuating a vehicle door of a vehicle , the capacitive sensor unit comprising:an evaluation unit; andan electrode assembly having a shield, an elongated sensor electrode and a supply line for electrically connecting said elongated sensor electrode to said evaluation unit, said supply line being surrounded by said shield, said electrode assembly further having a ground conductor connected in parallel with said supply line and connected to said shield in an electrically conductive manner over an entire length of said supply line.2. The sensor unit according to claim 1 , wherein said electrode assembly further comprising an electrically conductive covering sheath enclosing said ground conductor in a fluid-tight manner.3. The sensor unit according to claim 2 , wherein said electrically conductive covering sheath is formed from an electrically conductive plastic.4. The sensor unit according to claim 1 , wherein said elongated sensor electrode is formed in one piece with said supply line being an electrical supply line.5. The sensor unit according to claim 1 , wherein said electrode assembly further comprises an electrically insulating outer sheath enclosing said shield claim 1 , said electrically insulating outer sheath being in a form of a winding.6. The sensor unit according to claim 1 , wherein said electrode assembly further comprises an electrically conductive covering sheath enclosing said ground conductor in a watertight manner.7. The ...

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Номер записи: 57
14-11-2013 дата публикации

Method of measuring a physical parameter and electronic interface circuit for a capacitive sensor for implementing the same

Номер: US20130300437A1
Автор: Christophe Entringer, Sylvain Grosjean
Принадлежит: EM Microelectronic Marin SA

A physical parameter is measured via an electronic circuit connected to a two capacitor sensor. The circuit includes an amplifier connected to the common capacitor electrode, a logic unit for digital processing amplifier data and supplying a digital measuring signal, a digital-analogue converter for supplying a measuring voltage based on the digital measuring signal, a switching unit for alternately supplying the measuring voltage to the first and second fixed capacitor electrodes, and a regulated voltage for negative biasing or a low voltage for positive biasing from a voltage supply source. A first phase consists in biasing the first fixed electrode with the measuring voltage from first binary word and reference voltage, and the second fixed electrode with low voltage, and a second phase consists in biasing the second fixed electrode with measuring voltage from second binary word, which is reverse of the first binary word, and the reference voltage.

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Номер записи: 58
14-11-2013 дата публикации

SYSTEM AND METHOD OF SENSING ACTUATION AND RELEASE VOLTAGES OF AN INTERFEROMETRIC MODULATOR

Номер: US20130300439A1
Автор: Chui Clarence, Mathew Mithran C., Mignard Marc, Sampsell Jeffrey B.
Принадлежит:

A method for sensing the actuation and/or release voltages of a electromechanical system or a microelectromechanical device include applying a test pulse to the device and sensing its state. In one embodiment, the device is part of a system comprising an array of interferometric modulators suitable for a display. The method can be used to compensate for temperature dependent changes in display pixel characteristics. 1. A display device comprising:one or more electromechanical devices;a filter resistor connected in series with each row of electromechanical devices; anda sensing circuit for measuring the collective capacitance of each row of electromechanical devices.2. The display device of claim 1 , further comprising a driver circuit configured to sense an output of the sensor to determine a threshold voltage for use in testing the state of one or more of the devices.3. The system of claim 1 , wherein the one or more electromechanical devices includes one or more display elements.4. The system of claim 2 , wherein the one or more electromechanical devices are arranged in an array to display images in response to signals from the driver circuit.5. The system of claim 1 , wherein the sensing circuit comprises resistive and capacitive elements in parallel.6. The system of claim 1 , wherein the sensing circuit comprises an integrator with one or more passive feedback components.7. The system of claim 1 , further comprising a timing control circuit.8. The system of claim 7 , wherein the timing control circuit and the sensing circuit are embodied in an integrated circuit.9. The system of claim 7 , wherein the timing control circuit controls an activation of the one or more electromechanical devices.10. The system of claim 1 , wherein the one or more electromechanical devices include one or more interferometric modulators.11. The system of claim 1 , wherein the one or more electromechanical devices include a reflective surface.12. The system of claim 1 , wherein the one ...

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Номер записи: 59
14-11-2013 дата публикации

CAPACITIVE TOUCH SENSOR AND FABRICATION METHOD THEREOF AND CAPACITIVE TOUCH PANEL

Номер: US20130300440A1
Автор: HUANG PING-WEN, Su Kuo-Chang, WU MING-KUNG, YIN Hsiang-Wei
Принадлежит:

A capacitive touch sensor includes multiple first-axis traces, multiple second-axis traces, an insulation layer and multiple metal traces. Each first-axis trace includes multiple first touch-sensing pads and first connecting lines connected therebetween. Each second-axis trace includes multiple second touch-sensing pads and second connecting lines connected therebetween. At least one of the first connecting line and the second connecting line is a metal printing line. 1. A capacitive touch sensor , comprising:a plurality of first-axis traces, wherein each of the first-axis traces comprises a plurality of first touch-sensing pads and first connecting lines, the first touch-sensing pads are arranged along a first direction, and each of the first connecting lines connects two adjacent first touch-sensing pads;a plurality of second-axis traces intersected with the first-axis traces, wherein each of the second-axis traces comprises a plurality of second touch-sensing pads and second connecting lines, the second touch-sensing pads are arranged along a second direction different to the first direction, each of the second connecting lines connects two adjacent second touch-sensing pads, and at least one of the first connecting lines and the second connecting lines is a multi-layer stack structure;an insulation layer at least formed between the first connecting lines and the second connecting lines; anda plurality of metal traces disposed on the periphery of the capacitive touch sensor and electrically connected to the first-axis traces and the second-axis traces.2. The capacitive touch sensor as claimed in claim 1 , wherein each one of two adjacent first touch-sensing pads has a first extrusion extending towards the other claim 1 , and each one of two adjacent second touch-sensing pads has a second extrusion extending towards the other.3. The capacitive touch sensor as claimed in claim 1 , wherein the material of at least one of the first connecting lines and the second ...

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Номер записи: 60
14-11-2013 дата публикации

METHOD OF MEASURING A CAPACITANCE

Номер: US20130304397A1
Автор: Erlandsson Dag, Hedstrom Martin, LARSSON Joakim, Mattiasson Bo
Принадлежит: CAPSENZE HB

A method of measuring a capacitance (C) of a sensor having a working electrode that is coated by an insulating layer and a ligand forming an affinity surface. The method involves the steps of bringing the electrode into contact with an analyte, supplying a constant first current (I), and a constant second current (I) of opposite direction to the first current (I), and a constant third current (I) of same direction as the first current (I) during determined time periods to the sensor. Further the method includes sampling the potential (V) built up across the sensor, and calculating the capacitance of the sensor from the inclination (B, D, F, H) of a potential curve received in response to the current supply. A method used for detection of an interaction between a ligand and an analyte is also disclosed. 114-. (canceled)15. A method of measuring a capacitance (C) of a sensor having the capacitance and a resistance , the sensor including a working electrode that is coated by an insulating layer with a ligand arranged thereto forming an affinity surface on said electrode , the method comprising the steps of:bringing said electrode into contact with an analyte;{'sub': 1', '1, 'supplying a constant first current (I) to the sensor during a first time period (t) by means of a current source until a potential built up across the sensor has reached a predetermined value (V), and'}simultaneously sampling the potential (V) built up across the sensor;{'sub': 2', '2', '2', '1', '1', '2', '1', '1, 'supplying a constant second current (I) to the sensor during a second time period (t) by means of the current source, the second current (I) having an opposite direction compared to the first current (I) and having a same absolute value as the first current (I), wherein the second time period (t) is equal to said first time period (t) or is equal to said first time period (t) multiplied with a factor two, and'}simultaneously sampling the potential (V) built up across the sensor;{'sub': ...

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Номер записи: 61
21-11-2013 дата публикации

EXTERNAL OPERATION DETECTION STRUCTURE BODY

Номер: US20130307568A1
Автор: Hasegawa Koichi, HAYAKAWA Tomonori, MURAMATSU Atsushi
Принадлежит: TOKAI RUBBER INDUSTRIES, LTD.

An external operation detection structure body including: a sensor casing having an aperture window; an external operation detection sensor arranged at a formation zone of the aperture window; a sheet-like interface member that covers a front face of the detection sensor and closes the aperture window; an outer peripheral wall protruding out from a rear face of an outer periphery of the interface member and penetrating into the aperture window so as to be arranged between the detection sensor and the sensor casing; and front and rear face seal protrusions extending respectively from front and rear edges of the outer peripheral wall toward an outer peripheral side so as to be superposed respectively with front and rear faces of a peripheral edge of the aperture window of the sensor casing. 1. An external operation detection structure body comprising:a sensor casing having an aperture window;an external operation detection sensor arranged at a formation zone of the aperture window;a sheet-like interface member that covers a front face of the detection sensor and closes the aperture window, the interface member being formed of an elastic material;an outer peripheral wall formed protruding out from a rear face of an outer periphery of the interface member and penetrating into the aperture window of the sensor casing so as to be arranged between the detection sensor and the sensor casing;a front face seal protrusion formed extending from a front edge of the outer peripheral wall toward an outer peripheral side so as to be superposed with a front face of a peripheral edge of the aperture window of the sensor casing; anda rear face seal protrusion formed extending from a rear edge of the outer peripheral wall toward the outer peripheral side so as to be superposed with a rear face of the peripheral edge of the aperture window of the sensor casing.2. The external operation detection structure body according to claim 1 , further comprising a base member fixed and attached to ...

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Номер записи: 62
28-11-2013 дата публикации

ELECTRONIC DEVICE INCLUDING DEVICE GROUND COUPLED FINGER COUPLING ELECTRODE AND ARRAY SHIELDING ELECTRODE AND RELATED METHODS

Номер: US20130314105A1
Автор: Gozzini Giovanni, SETLAK Dale R.
Принадлежит: Apple Inc.

An electronic device may include a housing and circuitry carried by the housing and having a device ground associated therewith. The electronic device may also include an array of biometric finger sensing pixel electrodes and an array shielding electrode outside the array of biometric finger sensing pixels. A finger coupling electrode may be outside the array shielding electrode and coupled to the device ground. The electronic device may also include drive circuitry capable of generating a drive signal for the array of biometric finger sensing pixel electrodes and a compensating drive signal for the array shielding electrode. 1. An electronic device comprising:a housing;circuitry carried by said housing and having a device ground associated therewith;an array of biometric finger sensing pixel electrodes;an array shielding electrode outside said array of biometric finger sensing pixels;a finger coupling electrode outside said array shielding electrode and coupled to the device ground; anddrive circuitry capable of generating a drive signal for said array of biometric finger sensing pixel electrodes and a compensating drive signal for said array shielding electrode.2. The electronic device of claim 1 , wherein said drive circuitry is capable of generating the compensating drive signal comprising a scaled replica of the drive signal.3. The electronic device of claim 1 , further comprising sense amplifier circuitry coupled to said array of biometric finger sensing pixel electrodes and having a circuit reference associated therewith different than the device ground; and wherein said drive circuitry is capable of generating the drive signal between the device ground and the circuit reference.4. The electronic device of claim 1 , wherein said array shielding electrode comprises a plurality of shielding pixel electrodes.5. The electronic device of claim 1 , further comprising a reference electrode between said array shielding electrode and said array of biometric finger ...

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Номер записи: 63
28-11-2013 дата публикации

DEVICE AND METHOD FOR DETERMINING A MEASURING CAPACITANCE

Номер: US20130314107A1
Автор: Mellert Martin
Принадлежит: VEGA Grieshaber KG

A measuring device determines a measuring capacitance (CM), with a clock oscillator, which oscillates in a scanning frequency (f), a measuring oscillator, which oscillates in a measurement frequency in dependence on a measuring capacitance (C), and an edge counter, which counts the number of clock oscillations during a given number of measuring oscillations, wherein a circuit is provided for measurement refinement, wherein the circuit for measurement refinement is started by a measuring edge of a last scanned measuring oscillation and stopped by an equally oriented and immediately following edge of a subsequent clock oscillation. 1. A measuring device , for the determination of a measuring capacitance (C) , comprising:{'sub': 'A', 'a clock oscillator operative to oscillate in a scanning frequency (f);'}{'sub': 'M', 'a measuring oscillator operative to oscillate in a measurement frequency in dependence on a measuring capacitance (C); and'}an edge counter operative to count a number of clock oscillations during a given number of measuring oscillations, wherein a circuit is provided for a measurement refinement,characterized in that the circuit for said measurement refinement is operably started by a measuring edge of a last scanned measuring oscillation and operably stopped by an equally oriented and immediately following edge of a subsequent clock oscillation.2. A measuring device claim 1 , according to claim 1 , wherein:the measuring oscillator is started in synchronization with the clock oscillator.3. A measuring device claim 1 , according to claim 1 , wherein:the number of measurement pulse edges depends on a predetermined measurement time.4. A measuring device claim 3 , according to claim 3 , wherein:the measurement time is 5 ms.5. A measuring device claim 1 , according to claim 1 , wherein:the measuring edge is a falling edge.6. A measuring device claim 1 , according to claim 1 , wherein:{'sub': 'M', 'the measuring capacitance (C) is arranged in an oscillating ...

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Номер записи: 64
05-12-2013 дата публикации

ELECTROSTATIC CAPACITANCE DETECTION DEVICE

Номер: US20130321003A1
Автор: Sawada Takeshi, SHIMIZU Tomomi
Принадлежит: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHO

An electrostatic capacitance detection device includes a substrate having a predetermined thickness, an electrode layer formed on a front surface of the substrate in a predetermined pattern including electrodes to be touched so as to detect an electrostatic capacitance and wirings drawn from the electrodes, and a shield layer formed on a rear surface of the substrate and into a shield pattern corresponding to the predetermined pattern of the electrode layer. The shield pattern of the shield layer is formed surrounding the electrodes without overlapping with the electrodes, surrounding the wirings, and between the wirings when viewed in the thickness direction of the substrate. 1. An electrostatic capacitance detection device , comprising:a substrate having a predetermined thickness;an electrode layer formed on a front surface of the substrate in a predetermined pattern comprising electrodes to be touched so as to detect an electrostatic capacitance and wirings drawn from the electrodes; anda shield layer formed on a rear surface of the substrate and into a shield pattern corresponding to the predetermined pattern of the electrode layer,wherein the shield pattern of the shield layer is formed surrounding the electrodes without overlapping with the electrodes, surrounding the wirings, and between the wirings when viewed in the thickness direction of the substrate.2. The electrostatic capacitance detection device according to claim 1 , wherein the shield layer formed surrounding the wirings and between the wirings is partially overlapped with the wirings when viewed in the thickness direction of the substrate.3. The electrostatic capacitance detection device according to claim 2 , wherein all the shield layers including the shield layer formed between the wirings are formed to be electrically connected to each other.4. The electrostatic capacitance detection device according to claim 1 , wherein the shield layer comprises a mesh structure.5. The electrostatic ...

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Номер записи: 65
05-12-2013 дата публикации

METHOD FOR MEASURING CAPACITANCE AND CAPACITIVE SENSOR UNIT

Номер: US20130321006A1
Автор: POHL FLORIAN, WEINGAERTNER Thomas, Wuerstlein Holger
Принадлежит: BROSE FAHRZEUGTEILE GMBH & CO. KG, HALLSTADT

A method measures a capacitance. According to the method, a first detection measurement for the capacitance which is to be measured is detected by a first measurement method during a first measurement phase. In this case, a second measurement phase is started when the first detection measurement satisfies a transition criterion. A second detection measurement for the capacitance which is to be measured is detected during the second measurement phase by a second measurement method which differs from the first measurement method. The second measurement method has higher measurement accuracy than the first measurement method but also greater energy expenditure. 1. A method for measuring a capacitance , which comprises the steps of:during a first measuring phase, detecting a first detection measurement of the capacitance to be measured via a first measuring method;starting a second measuring phase when the first detection measurement satisfies a transition criterion; andduring the second measuring phase, detecting a second detection measurement of the capacitance to be measured via a second measuring method being different from the first measuring method, the second measuring method having a higher level of measuring accuracy compared to the first measuring method, and the first measuring method having a lower expenditure of energy compared to the second measuring method.2. The method according to claim 1 , which further comprises:during the first measuring phase, detecting a measurement of a charging speed of a sensor electrode as the first detection measurement; andduring the second measuring phase, detecting a measurement of a charge quantity on the sensor electrode as the second detection measurement.3. The method according to claim 2 , which further comprises:defining the transition criterion to contain a threshold value comparison of the first detection measurement with a given threshold value; anddetecting an electrical voltage dropping across the sensor ...

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Номер записи: 66
12-12-2013 дата публикации

CAPACITANCE-TYPE OCCUPANT DETECTION SENSOR

Номер: US20130328577A1
Автор: Mori Hiroyuki, Nakagawa Hajime, Satake Masayoshi
Принадлежит:

A capacitance-type occupant detection sensor of the present disclosure detects a vehicle occupant on a seat based on a difference of capacitance between a sensor body and a reference electric potential. The sensor body includes a main electrode and a parallel electrode. The parallel electrode is disposed in parallel with the main electrode with a gap interposed therebetween and has a detection voltage applied thereto. The main electrode and the parallel electrode each have a base material, a first electrode member disposed on the base material, and a second electrode member disposed on the base material to cover the first electrode member, where the second electrode member has an electric conductivity that is lower than the first electrode member. The first electrode member is disposed on a lateral perimeter of the second electrode member to surround a center of the second electrode member. 1. A sensor body of a capacitance-type occupant detection sensor for detecting an occupant seated on a seat of a vehicle based on a capacitance value between a reference voltage and the sensor body , the sensor body being disposed in the seat , the sensor body comprising:a main electrode having a detection voltage applied thereto; anda parallel electrode disposed in parallel with the main electrode with a gap interposed therebetween, the parallel electrode having the detection voltage applied thereto, whereinthe main electrode and the parallel electrode each have a base material, a first electrode member disposed on the base material, and a second electrode member disposed on the base material to cover the first electrode member, the second electrode member has an electric conductivity lower than the first electrode member, andthe first electrode member is disposed on a lateral perimeter of the second electrode member to surround a center of the second electrode member.2. A sensor body of a capacitance-type occupant detection sensor for detecting an occupant seated on a seat of a ...

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Номер записи: 67
26-12-2013 дата публикации

ELECTROSTATIC CAPACITANCE DETECTION DEVICE

Номер: US20130342220A1
Автор: SHIMIZU Tomomi
Принадлежит: KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHO

An electrostatic capacitance detection device includes a plurality of electrodes configured to detect an electrostatic capacitance, an electrostatic capacitance measurement part configured to select one electrode from the plurality of electrodes as a detection electrode, to allow the electrodes other than the detection electrode to be in a first electric potential condition and then to be in a second electric potential condition that is different from the first electric potential condition, and to measure a first voltage of the detection electrode in the first electric potential condition and a second voltage of the detection electrode in the second electric potential condition, and a judgment part configured to compare measurement values based on the first and the second voltages of the detection electrode, thereby to judge whether the detection electrode is in a short circuit condition. 1. An electrostatic capacitance detection device , comprising:a plurality of electrodes configured to detect an electrostatic capacitance;an electrostatic capacitance measurement part configured to select one electrode from the plurality of electrodes as a detection electrode, to allow the electrodes other than the detection electrode to be in a first electric potential condition and then to be in a second electric potential condition that is different from the first electric potential condition, and to measure a first voltage of the detection electrode in the first electric potential condition and a second voltage of the detection electrode in the second electric potential condition; anda judgment part configured to compare measurement values based on the first and the second voltages of the detection electrode, thereby to judge whether the detection electrode is in a short circuit condition.2. The electrostatic capacitance detection device according to claim 1 , wherein the first electric potential condition is one of Open claim 1 , Lo and Hi claim 1 , and the second electric ...

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Номер записи: 68
26-12-2013 дата публикации

SENSOR SYSTEM FOR MONITORING SURROUNDINGS ON A MECHANICAL COMPONENT, AND METHOD FOR ACTUATING AND EVALUATING THE SENSOR SYSTEM

Номер: US20130342224A1
Автор: Frangen Joachim
Принадлежит:

A sensor system for monitoring surroundings on a mechanical component, includes at least one capacitive sensor element that is attachable to the surface of machines or machine parts, the at least one sensor element being constructed from a layered structure of flexible electrically conductive and electrically insulating plies, electrically conductive potential surfaces of one ply being disposed, laterally spaced apart via insulating plies located therebetween, in such a way that electric field lines form between the conductive potential surfaces and change measurably upon proximity and/or contact of a body or an object. The layered structure of a sensor element has at least two measuring elements operating separately from one another. 111-. (canceled)12. A sensor system for monitoring surroundings on a mechanical component , comprising:at least one capacitive sensor element attachable to a surface of the mechanical component and having a layered structure of flexible electrically conductive and electrically insulating plies;wherein electrically conductive potential surfaces of a selected ply are disposed, laterally spaced apart via insulating plies located therebetween, in such a way electric field lines form between the conductive potential surfaces of the selected ply and change measurably upon at least one of (i) proximity of the sensor element with one of a body or an object, and (ii) contact between the sensor element and one of the body or the object; andwherein the layered structure of the sensor element has at least two measuring elements configured to operate separately from one another.13. The sensor system as recited in claim 12 , further comprising:two control units configured to separately control the two measuring elements, the two control units including (i) a first control unit configured to control and evaluate a first one of the measuring elements, and (ii) a second control unit configured to control and evaluate a second one of the measuring ...

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Номер записи: 69
26-12-2013 дата публикации

Capacitive Analysis of a Moving Test Material

Номер: US20130342225A1
Автор: Bleisch Karl, Gehrig Reto, Koller Beat
Принадлежит: Uster Technologies AG

The capacitive measuring circuit for a moved elongated test material contains at least two measuring capacitors, each of which is configured for receiving the test material. It further contains electrically actuatable selection means, by means of which one of the measuring capacitors can be selected in such a way that only the selected measuring capacitor contributes to the measurement, whereas the other measuring capacitors do not. As a result, the total capacitance of the measuring circuit is reduced and its sensitivity is increased. 1. A device for taking a capacitive measurement of a moving strand of test material , the device comprising:lead-through openings, each with different geometrical masses, disposed such that the test material is movable along a longitudinal axis through only a selected one of the openings,a conveyor for conveying only one strand of test material through only the selected one of the openings, and measuring capacitors associated with the openings such that a capacitance of a given measuring capacitor is influenced by the test material in an associated opening,', 'a generator for applying an electrical alternating signal to the measuring capacitors,', 'at least one line for carrying output signals from the measuring capacitors, and', 'and electrically actuatable selector, for selecting a subset of the measuring capacitors, such that only the selected subset contributes to the measurement., 'a capacitive measuring circuit, comprising,'}2. The device of claim 1 , wherein each measuring capacitor is associated with a compensation capacitor for compensating influences that disturb the measurement claim 1 , and wherein each measuring capacitor and the compensation capacitor associated therewith form a capacitor pair connected in series.3. The device of claim 2 , wherein a given one of the lines taps the output signal between the measuring capacitor and the compensation capacitor that form the associated capacitor pair.4. The device of claim 1 ...

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Номер записи: 70
02-01-2014 дата публикации

CAPACITANCE SENSING METHOD

Номер: US20140002115A1
Автор: CHANG Tsen-Wei, Hung Ching-Ho, LIN Ching-Chun, Lin Yi-Liang, Tang Wing-Kai, TSAI Jiun-Jie
Принадлежит: NOVATEK MICROELECTRONICS CORP.

A capacitance sensing method is provided. The capacitance sensing method includes the following steps. During at least one first period of a sensing period, a capacitance under test is sensed through a first sensing channel, and a reference capacitance is sensed through a second sensing channel. During at least one second period of the sensing period, the reference capacitance is sensed through the first sensing channel, and the capacitance under test is sensed through the second sensing channel. A first difference is generated according to the capacitance under test and the reference capacitance. 1. A capacitance sensing method , comprising:sensing a capacitance under test through a first sensing channel and sensing a reference capacitance through a second sensing channel during at least one first period of a sensing period;sensing the reference capacitance through the first sensing channel and sensing the capacitance under test through the second sensing channel during at least one second period of the sensing period; andgenerating a first difference according to the capacitance under test and the reference capacitance.2. The capacitance sensing method according to claim 1 , wherein the first sensing channel comprises a first charge-to-voltage converting unit claim 1 , the second sensing channel comprises a second charge-to-voltage converting unit claim 1 , and the capacitance sensing method further comprises:converting the capacitance under test into the voltage under test through the first charge-to-voltage converting unit and converting the reference capacitance into the reference voltage through the second charge-to-voltage converting unit during the first period; andconverting the reference capacitance into the reference voltage through the first charge-to-voltage converting unit and converting the capacitance under test into the voltage under test through the second charge-to-voltage converting unit during the second period,wherein in the step of generating ...

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Номер записи: 71
02-01-2014 дата публикации

CAPACITIVE SENSOR FOR AN ANTI-COLLISION APPARATUS

Номер: US20140002116A1
Автор: POHL FLORIAN, Wuerstlein Holger
Принадлежит:

A capacitive sensor detects an object, in particular detects a collision in the case of a movable vehicle part. The sensor has an electrode arrangement which contains at least one sensor electrode. The sensor also has an evaluation circuit which is connected downstream of the sensor electrode and is intended to process a reception signal generated in the sensor electrode. In this case, the evaluation circuit contains a transimpedance amplifier which has a device for compensating for the frequency response. 1. A capacitive sensor for detecting an object , the capacitive sensor comprising:an electrode configuration having at least one sensor electrode; andan evaluation circuit connected downstream of said sensor electrode for processing a reception signal generated by said sensor electrode, said evaluation circuit having a transimpedance amplifier, said transimpedance amplifier having means for compensating for a frequency response.2. The sensor according to claim 1 , wherein:said sensor electrode having at least one transmission electrode for emitting an electric field when a transmission signal is applied and at least one reception electrode; andsaid evaluation circuit being connected downstream of said reception electrode for processing the reception signal generated in said reception electrode under an action of the electric field.3. The sensor according to claim 1 , wherein said transimpedance amplifier has an operational amplifier with a non-inverting input connected to one of ground or another reference potential claim 1 , an inverting input connected to said sensor electrode claim 1 , and an output coupled with negative feedback to said inverting input claim 1 , and forms said means for compensating for the frequency response claim 1 , solely via said negative feedback including a capacitance.4. The sensor according to claim 1 , wherein said transimpedance amplifier has an operational amplifier with a non-inverting input connected to one of ground or another ...

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Номер записи: 72
09-01-2014 дата публикации

Capacitance measurement circuit

Номер: US20140009176A1
Автор: Ahmad AI-Dahle, Saman Saeedi, Shafiq M. Jamal
Принадлежит: Apple Inc

A resistor having a known resistance is coupled in series with a device under test (DUT) having an unknown capacitance. An ac signal source having a known fundamental frequency is coupled to drive the resistor to thereby produce a first ac signal. A phase controllable signal generator produces a second ac signal. The first and second ac signals are fed to a mixer. An output of the mixer is low pass filtered. A peak detector monitors the low pass filtered output while sweeping the phase controllable signal generator, until a peak is detected. The set phase corresponding to the detected peak is then used to obtain an estimate of the unknown DUT capacitance. Other embodiments are also described and claimed.

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Номер записи: 73
09-01-2014 дата публикации

Device and Method for Determining Capacitance as a Function of Voltage

Номер: US20140009177A1
Автор: Ashton Robert A.
Принадлежит: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC

A device and method of determining a capacitance of a device is provided, which in one embodiment includes connecting a first terminal of a capacitor having a known capacitance to the first terminal of the device, applying an AC voltage to the first terminal of the device and the first terminal of the capacitor, measuring a current through the capacitor, measuring a current through the device, determining a first voltage across the device as a function of time, computing a capacitance of the device as a function of time by multiplying the capacitance of the capacitor by the ratio of the current through the device to the current through the capacitor, determining a capacitance of the device as a function of voltage based on the capacitance as a function of time and the first voltage across the device as a function of time, and outputting data of the first capacitance of the device as a function of voltage. 1. A method of determining a capacitance of a device having a first terminal and a second terminal , comprising:connecting the first terminal of the device to a first channel of an oscilloscope;connecting a first terminal of a capacitor having a known capacitance to the first terminal of the device;connecting a second terminal of the device to a second channel of the oscilloscope;connection a second terminal of the capacitor to a third channel of the oscilloscope;supplying an alternating current (AC) voltage to the first terminal of the device and the first terminal of the capacitor;determining a voltage as a function of time across the device while supplying the AC voltage from information collected by the first channel of the oscilloscope;determining a current through the device from information collected by the second channel of the oscilloscope while supplying the AC voltage to the first terminal of the device;determining a current through the capacitor from information collected by the third channel of the oscilloscope while supplying the AC voltage to the ...

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Номер записи: 74
16-01-2014 дата публикации

DETECTION CIRCUIT FOR CAPACITIVE SENSOR

Номер: US20140015544A1
Автор: NEZUKA Tomohiro
Принадлежит:

A detection circuit for a capacitive sensor includes a drive signal generator for applying drive signal to a sensor common terminal, a sense amplifier having input terminals respectively connected to sensor detection terminals, and a controller for controlling input common-mode voltage of the sense amplifier to predetermined voltage. The controller includes a feedback amplifier for outputting feedback voltage according to difference between the common-mode and predetermined voltages, a pair of first feedback capacitors having one ends respectively connected to the detection terminals and another ends connected together, a second feedback capacitor having one end connected to the other ends, and a voltage switcher for applying first preset voltage to the other ends during first level of the drive signal and for applying second preset voltage to the other ends and the predetermined voltage to another end of the second feedback capacitor during second level of the drive signal. 1. A detection circuit for a capacitive sensor including a pair of sense capacitors with capacitances having a difference responsive to a physical quantity , one ends of the sense capacitors being connected together to provide a common terminal , another ends of the sense capacitors being configured to provide separate detection terminals , the detection circuit comprising:a drive signal generation circuit capable of generating and applying a drive signal to the common terminal, the drive signal varying between a first level and a second level;a fully differential sense amplifier having inverting and non-inverting input terminals respectively connected to the detection terminals, the sense amplifier being capable of outputting a differential voltage according to the difference between the capacitances of the sense capacitors; anda common-mode voltage control circuit capable of controlling an input common-mode voltage of the sense amplifier to a predetermined voltage, whereinthe common-mode ...

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Номер записи: 75
16-01-2014 дата публикации

NANOSCALE SENSORS WITH NANOPOROUS MATERIAL

Номер: US20140015548A1
Автор: Cai Dong, Chiles Thomas, Naughton Michael J., Rizal Binod, Zhao Huaizhou
Принадлежит:

A nanocoaxial sensor includes an outer conductor, an inner conductor, a nanoporous dielectric material disposed between the outer and inner conductors, a nanocavity sized to allow target species to enter the nanocavity between the outer and inner conductors. 1. A nanosensor , comprising a capacitor having a space between a first and second conductor of the capacitor , wherein:the space is at least partially filled with a nanoporous dielectric material;the nanosensor produces a signal in response to the capture of a target species in the space.2. The nanosensor of claim 1 , wherein the nanosensor is adapted to exhibit each of: a size-dependent physical selection of target species entering into the space; a selective capture of at least one of the target species within the space to at least one of the first and second conductors; and an electromagnetic shielding within the space such that a signal produced in response to the selective capture within the space is substantially undisturbed by a capture outside of the space.3. The nanosensor of claim 2 , wherein the size-dependent physical selection is performed by an opening to a nanocavity in the space which prevents species having a size greater than a critical size from entering into the nanocavity.4. The nanosensor of claim 2 , wherein the size comprises a distance between the first and second conductors.5. The nanosensor of claim 1 , wherein the signal produced in response to the capture comprises a change in capacitance of the capacitor.6. The nanosensor of claim 1 , wherein: the capacitor comprises a nanocoaxial capacitor; the first conductor comprises an outer conductor of the nanocoaxial capacitor; and the inner conductor comprises an inner conductor of the nanocoaxial capacitor.7. The nanosensor of claim 6 , further comprising a nanoporous dielectric material disposed between the inner and outer conductors.8. The nanosensor of claim 7 , comprising an etched nanocavity in at least a portion of the dielectric ...

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Номер записи: 76
16-01-2014 дата публикации

Detection circuit for capacitive sensor

Номер: US20140015550A1
Автор: Tomohiro Nezuka
Принадлежит: Denso Corp

A detection circuit for a capacitive sensor includes a drive signal generator for applying drive signal varying between first and second levels to a sensor common terminal, a sense amplifier having input terminals respectively connected to sensor detection terminals, and a controller for controlling input common-mode voltage of the sense amplifier to predetermined voltage. The controller includes a feedback amplifier for outputting feedback voltage according to difference between the common-mode and predetermined voltages, a pair of feedback capacitors having one ends respectively connected to the detection terminals and another ends connected together, and a voltage switcher for applying preset voltage, between the predetermined voltage and a limit voltage outputtable by the feedback amplifier in direction where the second level exists relative to the first level, to the other ends during the first level and the feedback voltage to the other ends during the second level.

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Номер записи: 77
23-01-2014 дата публикации

PROXIMITY SENSING STRUCTURE AND ELECTRONIC DEVICE HAVING PROXIMITY SENSING CAPABILITY

Номер: US20140021801A1
Автор: CHEN CHUNG-WEN, KAO KUO-WEI
Принадлежит: WISTRON CORPORATION

The present invention relates to a proximity sensing structure, which is disposed in an article for detecting whether an object approaches the article. The article can be an electronic device. The proximity sensing structure comprises a first sensing electrode, a wire, a second sensing electrode, and a proximity sensor. Both ends of the wire are coupled electrically to the first and second sensing electrodes, respectively. The proximity sensor is coupled electrically to the wire, the first sensing electrode, and the second sensing electrode, and detects whether the object approaches the article according to an electrical status of the wire, the first sensing electrode, and the second sensing electrode. Thereby, the proximity sensing structure according to the present invention uses the wire to increase the sensing area. In addition, the wire design makes the disposal of the proximity sensing structure more flexible. 1. A proximity sensing structure , disposed in an article , used for detecting whether an object approaches said article , and comprising:a first sensing electrode;a wire, having an end coupled electrically to said first sensing electrode;a second sensing electrode, coupled to the other end of said wire; anda proximity sensor, coupled electrically to said wire, said first sensing electrode, and said second sensing electrode, and detecting whether said object approaches said article according to an electrical status of said wire, said first sensing electrode, and said second sensing electrode.2. The proximity sensing structure of claim 1 , wherein said first sensing electrode claim 1 , said second sensing electrode claim 1 , and said wire are located surrounding a target of said article.3. The proximity sensing structure of claim 2 , wherein said first sensing electrode is located at a first side of said target of said article claim 2 , said second sensing electrode is located at a second side of said target of said article claim 2 , and said wire is ...

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Номер записи: 78
23-01-2014 дата публикации

CAPACITANCE MEASUREMENT

Номер: US20140021966A1
Автор: Dattalo Tracy Scott, Reynolds Joseph Kurth, Schwartz Adam, Shahparnia Shahrooz, SHAHROKHI Farzaneh
Принадлежит: SYNAPTICS INCORPORATED

A differential amplifier has an output and differential first and second inputs. A switch disposed between a sensor electrode and the second input is opened to initiate a reset phase where the sensor electrode and the differential amplifier are decoupled. A feedback capacitance disposed between the second input and the output is reset to a first level of charge. The switch is closed to initiate a measurement phase where the second input and sensor electrode are coupled. In the measurement phase: charge is balanced between the sensor electrode and the feedback capacitance such that a sensor electrode voltage equals a voltage of the first input equals a voltage of the second input, and the sensor electrode is charged; and the differential amplifier is utilized to integrate charge on the sensor electrode, such that an absolute capacitance corresponding to a coupling between the sensor electrode and an input object is measured. 1. A method of capacitance measurement with a differential amplifier having an output and differential first and second inputs , said method comprising:opening a switch disposed between a sensor electrode and said second input of said differential amplifier to initiate a reset phase where said sensor electrode and said differential amplifier are decoupled;resetting a feedback capacitance to a first level of charge, said feedback capacitance disposed between said second input and said output; balancing charge between said sensor electrode and said feedback capacitance such that a sensor electrode voltage equals a voltage of said first input equals a voltage of said second input, and said sensor electrode is charged to a value proportional to its capacitance and said voltage of said second input; and', 'utilizing said differential amplifier to integrate charge on said sensor electrode, such that an absolute capacitance corresponding to a coupling between said sensor electrode and an input object is measured., 'closing said switch to initiate a ...

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Номер записи: 79
23-01-2014 дата публикации

DISCONTINUOUS INTEGRATION USING HALF PERIODS

Номер: US20140022203A1
Автор: Bihday Volodymyr, Karpin Oleksandr, Kolych Igor, Maharyta Andriy, Ogirko Roman, Ribeiro Milton
Принадлежит:

Apparatuses and methods of frequency hopping algorithms are described. One method monitors a signal on one or more electrodes of a sense network at a first operating frequency and detects noise in the signal at the first operating frequency. The method then switches to a second operating frequency, based on said detecting, for scanning the electrodes to detect a conductive object proximate to the plurality of electrodes, wherein a constant integration time is used for one half-period when scanning the electrodes at both the first and second operating frequencies. 1. A method comprising:monitoring a signal on one or more electrodes of a sense network at a first operating frequency;monitoring a signal on the one or more electrodes of the sense network at a second operating frequency; andscanning, by a controller comprising a processing device and a memory, the one or more electrodes to detect a conductive object proximate to the sense network, wherein a constant integration time is used for one half-period when scanning the one or more electrodes at both the first and second operating frequencies.2. The method of claim 1 , further comprising:detecting noise in the signal at the first operating frequency; and comparing a noise level to a first noise threshold; and', 'detecting noise if the noise level exceeds the first noise threshold., 'switching to the second operating frequency, based on said detecting, wherein detecting noise in the signal comprises3. The method of claim 2 , wherein switching to a second operating frequency comprises selecting one of a plurality of operating frequencies defined by a frequency hopping algorithm claim 2 , wherein the second operating frequency is the one of the plurality of operating frequencies with a lowest noise level.4. The method of claim 1 , wherein the constant integration time is defined in a single set of configuration data used for both the first and second operating frequencies.5. The method of claim 1 , further comprising ...

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Номер записи: 80
30-01-2014 дата публикации

Method for Controlling a Battery System, a Battery System, and Motor Vehicle

Номер: US20140028088A1
Автор: Anzicek Joshua, Rischen Joachim, Salziger Jan
Принадлежит:

A battery system comprises at least one battery cell and a high-voltage network connected thereto which includes a pre-charge circuit having at least one pre-charge resistor. The battery system further comprises a component including a link capacitor with a specific capacitance. A method for controlling the battery system includes measuring a first voltage at the link capacitor before charging, charging the link capacitor, and measuring a second voltage at the link capacitor after charging. The method further includes forming a voltage difference from the first and the second voltage, and determining an energy received by the pre-charge resistor based on the voltage difference at the link capacitor and based on the capacitance of the link capacitor. 1. A method for controlling a battery system including at least one battery cell and a high-voltage network connected to the at least one battery cell , the high-voltage network including a pre-charge circuit having at least one pre-charge resistor , and a component having a link capacitor with a specific capacitance , the method comprising:measuring a first voltage at the link capacitor before charging the link capacitor;charging the link capacitor;measuring a second voltage at the link capacitor after charging the link capacitor;forming a voltage difference from the first voltage and second voltage; anddetermining an energy received by the pre-charge resistor based on the voltage difference at the link capacitor and further based on the specific capacitance of the link capacitor.3. The method according to claim 1 , further comprising:determining a heat energy output by the pre-charge resistor.4. The method according to claim 3 , further comprising:determining a maximum power over a specific period of time for the pre-charge resistor based on (i) a thermal loadability of the pre-charge resistor, and (ii) the heat energy output by the pre-charge resistor.5. The method according to claim 1 , further comprising:predicting ...

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Номер записи: 81
30-01-2014 дата публикации

SELF-CAPACITIVE TOUCH PANEL

Номер: US20140028334A1
Автор: Liu Chun-Chen, Tsai Meng-Che
Принадлежит: MStar Semiconductor, Inc.

A self-capacitive touch panel including a border region and a central region is provided. The border region has a first area and corresponds to a P number of first sensors. The central region has a second area and corresponds to a Q number of second sensors. A ratio of P to the first area is greater than a ratio of Q to the second area. 1. A self-capacitive touch panel , comprising:a P number of first sensors, where P is a positive integer;a Q number of second sensors, where Q is a positive integer; and a border region, having a first area, wherein the P number of first sensors are configured to sense a capacitance change corresponding to the border region; and', 'a central region, having a second area, wherein the Q number of second sensors are configured to sense a capacitance change corresponding to the central region;, 'a sensing area, comprisingwherein, a ratio of P to the first area is greater than a ratio of Q to the second area.2. The self-capacitive touch panel according to claim 1 , wherein the border region comprises a border electrode having a first center of gravity claim 1 , the central region comprises a central electrode having a second center of gravity; an average distance between the first center of gravity and all possible touch points in the border electrode is smaller than an average distance between the second center of gravity and all possible touch points in the central electrode; the first center of gravity represents a position of the capacitance change sensed by the P number of first sensors claim 1 , and the second center of gravity represents a position of the capacitance change sensed by the Q number of second sensors.3. The self-capacitive touch panel according to claim 2 , wherein a planar shape of the border electrode approximates a first right triangle claim 2 , the central electrode comprises a plurality of central sub-electrodes claim 2 , a planar shape of the central sub-electrodes approximates a second right triangle claim 2 , ...

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Номер записи: 82
06-02-2014 дата публикации

METHOD FOR CONTACTLESS DETEMRINATION OF ELECTRICAL POTENTIAL USING OSCILLATING ELECTRODE, AND DEVICE

Номер: US20140035598A1
Автор: Makuth Jens, Scheibner Dirk, Schimmer Jürgen
Принадлежит: SIEMENS AKTIENGESELLSCHAFT

The electrical potential of an object is determined by providing a mechanically oscillating electrode located at a distance from the object and making the electrode mechanically oscillate. A change in a state of electric charge of the electrode over time and amplitudes of at least two frequency components during the change in the state of electric charge over time are determined. Based on the amplitudes, at least one parameter that forms part of the value of a capacitance of an arrangement formed by the electrode and the object is determined, so that the capacitance of the arrangement formed by the electrode and object can be determined based on the parameter. Finally, the electrical potential is determined from the change in the state of electric charge and the capacitance. 18-. (canceled)9. A method for the contactless determination of an electrical potential of an object , comprising:providing a mechanically oscillating electrode, spatially distanced from the object;triggering the electrode to oscillate mechanically;determining a temporal change in an electrical charge state of the electrode; determining a first amplitude at a first frequency;', 'determining a second amplitude at a second frequency, as a whole number multiple of the first frequency; and', 'determining an idling distance of the electrode from the object based on a ratio of the first amplitude to the second amplitude;, 'determining amplitudes of at least two frequency components in the temporal change of the electrical charge state by'}determining, based on the first and second amplitudes, at least one parameter included in a value of an electrical capacitance of an arrangement formed by the electrode and the object;determining the electrical capacitance of the arrangement formed by the electrode and the object based on the parameter; anddetermining the electrical potential from the temporal change in the electrical charge state and the electrical capacitance of the arrangement.10. The method as ...

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Номер записи: 83
06-02-2014 дата публикации

CAPACITIVE SENSOR SHEET PRODUCING METHOD AND CAPACITIVE SENSOR SHEET

Номер: US20140035599A1
Автор: Komatsu Hiroto, Shimata Satoshi
Принадлежит: SHIN-ETSU POLYMER CO., LTD.

A capacitive sensor sheet producing method for producing a capacitive sensor sheet uses a base having an insulative base layer on which a binder resin layer including conductive nanowires is formed. The conductive nanowires partially projecting from a surface of the binder resin layer. The method includes removing a binder resin from projections of conductive nanowires partially projected from a plurality of detection electrodes by implementing a surface etching and shaping treatment on a surface of the binder resin layer, or surface ends of at least partial detection electrodes of the plurality of detection electrodes, forming wiring lines of the conductive pattern layer, and connecting the wiring lines to the surface ends of at least partial detection electrodes in the pattern layer. The projections of the conductive nanowires removed the binder resin are put into contact with the connecting portions. 1. A capacitive sensor sheet producing method for producing a capacitive sensor sheet by using a base having an insulative base layer on which a binder resin layer including conductive nanowires is formed , the conductive nanowires partially projecting from a surface of the binder resin layer , comprising the steps of:when a plurality of detection electrodes of a conductive pattern layer are formed by shaping a binder resin layer of a base, removing a binder resin from projections of conductive nanowires partially projected from the detection electrodes by implementing a surface etching and shaping treatment on a surface of the binder resin layer, or surface ends of at least partial detection electrodes of the plurality of detection electrodes;forming wiring lines of the conductive pattern layer by applying a conductive material on a base layer of the base and drying and curing the applied conductive material; and,connecting the wiring lines to the surface ends of at least partial detection electrodes in the pattern layer,wherein the projections of the conductive ...

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Номер записи: 84
06-02-2014 дата публикации

MULTI-FUNCTION SENSOR AND METHOD

Номер: US20140035600A1
Автор: SAGE Ian
Принадлежит: Methode Electronics, Inc.

A multi-function sensor apparatus includes multiple sensing electrodes and a control circuit adapted to receive signals from each of the sensing electrodes and to deem whether the sensing electrodes are in a touched state or an untouched state. The control circuit also is adapted to selectively provide an output based on the sensor's states and the manner in which the sensors came to be in such states. 1. A multi-function sensor apparatus comprising:a first sensing electrode;a second sensing electrode; and receive signals from said first sensing electrode;', 'receive signals from said second sensing electrode;', 'deem whether said first sensing electrode is in a touched state;', 'deem whether said second sensing electrode is in a touched state; and', a first state when said control circuit deems fewer than both of said first and said second sensing electrodes to be in a touched state;', 'a second state when said control circuit deems both of said first and said second sensing electrodes to be in a touched state simultaneously for at least a predetermined period of time, and', 'a third state when said control circuit deems one of said first and said second sensing electrodes to be in a touched state and then, after the expiration of a second predetermined period of time but before the expiration of a third predetermined period of time, deems the other of said first and said second sensing electrodes to be in a touched state., 'provide an output having], 'a control circuit configured to2. The multi-function sensor apparatus or wherein said control circuit periodically receives signals from said first sensing electrode and deems said first sensing electrode to be in a touched state when a value corresponding to a signal received from said first sensing electrode exceeds the average of values corresponding to a predetermined previous number of signals received from said first sensing electrode by a predetermined threshold amount.3. The multi-function sensor apparatus of ...

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Номер записи: 85
06-02-2014 дата публикации

ELECTROSTATIC CAPACITANCE DETECTION CIRCUIT AND INPUT DEVICE

Номер: US20140035601A1
Автор: FUJIYOSHI Tatsumi
Принадлежит:

An electrostatic capacitance detection circuit includes a charge amplifier that has an operational amplifier in which a capacitor is provided on a feedback path, and into which a signal including detection of electric charge of an inter-electrode capacitor of a sensor electrode and electric charge due to an external noise, and a selection switch that can switch a direction of a capacitor that is connected to input and output terminals of the charge amplifier through a feedback path that switches the direction of the capacitor depending on a direction of electric charge flowing in from a detection-side electrode of the sensor electrode, due to a drive signal applied to the sensor electrode. 1. An electrostatic capacitance detection circuit comprising:an electric charge integral circuit into which a signal including detection electric charge of an inter-electrode capacitor of a sensor electrode and electric charge due to an external noise flows, wherein the electric charge integral circuit includes a capacitor that accumulates the electric charge transferred between the capacitor and the inter-electrode capacitor, and continuously integrates the electric charge, transferred due to a drive signal applied to a drive-side electrode of the sensor electrode, in the capacitor; andan A/D converter that converts an output of the electric charge integral circuit from an analog signal into a digital signal.2. The electrostatic capacitance detection circuit according to claim 1 ,wherein the electric charge integral circuit includes:a charge amplifier that has an operational amplifier in which the capacitor is provided on a feedback path, anda selection circuit that has multiple selection switches, each switching a direction of a signal applied to the capacitor, and that switches connection to the capacitor depending on a direction of the electric charge that flows in from a detection-side electrode of the sensor electrode, with a drive signal applied to the drive-side electrode ...

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Номер записи: 86
13-02-2014 дата публикации

GRAIN BIN CAPACITIVE MOISTURE SENSOR SYSTEM AND METHOD

Номер: US20140043048A1
Автор: BENSON, Bloemendaal Brent J., JR. Raymond George
Принадлежит: CTB, Inc.

A data collector associated with a grain bin is in communication with a plurality of capacitive moisture cables hanging within the grain bin. Each capacitive moisture cable includes a plurality of sensor nodes positioned along the moisture cable. Each sensor node includes a sensor node microprocessor and a sensor node memory coupled to a temperature sensor, a reference capacitive sensor and a capacitive moisture sensor. A main controller is in communication with the data collector. The main controller memory is configured in a data structure comprising grain type data, temperature data, raw reference capacitance data, raw moisture capacitance data, node identification data, physical node positional data, and a calculated moisture content for each sensor node. A method of determining moisture contents of grain in a grain bin related to such a system is also included. 1. A grain bin moisture sensor system comprising:a data collector associated with a grain bin and comprising a data collector microprocessor and a data collector memory, the data collector being in communication with at least one capacitive moisture cable hanging within the grain bin;each capacitive moisture cable comprising a plurality of sensor nodes spaced at a predetermined interval along the moisture cable and each sensor node being wired in parallel to the data collector;each sensor node comprising a sensor node microprocessor and a sensor node memory coupled to a temperature sensor, a reference capacitive sensor and a capacitive moisture sensor,a main controller comprising a main controller microprocessor and a main controller memory, the main controller being in communication with the data collector, wherein the main controller memory is configured in a data structure comprising grain type data, temperature data, raw reference capacitance data, raw moisture capacitance data, node identification data, physical node positional data, and a calculated moisture content for each sensor node.2. The ...

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Номер записи: 87
20-02-2014 дата публикации

SYSTEM FOR MEASURING ELECTRICAL CHARGE

Номер: US20140049269A1
Автор: Adamczyk Marek, Sosin Maciej, Sosin Zbigniew
Принадлежит: UNIWERSYTET JAGIELLONSKI

A system for measuring electrical charge, comprising a capacitance detector () connected to a charge integrator () being an operational amplifier with a capacitance feedback (), in which the input stage () of the charge integrator () comprises a pair of symmetrically connected JFET-type transistors (T1; T2), having gates connected to the input of the charge integrator (). 1121120120. A system for measuring electrical charge , comprising a capacitance detector connected to a charge integrator being a operational amplifier with capacitance feedback , characterised in that the input stage () of the charge integrator () comprises a pair of symmetrically connected JFET-type transistors (T , T) , having gates connected to the input of the charge integrator ().2121120. A system according to claim 1 , characterised in that input stage () of the charge integrator () comprises at least two parallel pairs of symmetrically connected JFET transistors (T claim 1 , T).3121120. A system according to claim 1 , characterised in that the input stage () of the charge integrator () is connected to symmetrically connected common base amplifiers (T claim 1 , T).4121120122120. A system according to claim 1 , characterised in that in the input stage () of the charge integrator () claim 1 , a key (K claim 1 , K) in parallel with a current source (I claim 1 , I) is connected to each source of the symmetrically connected transistors (T claim 1 , T) claim 1 , wherein the system also comprises a system () for evaluating the output voltage of the charge integrator () claim 1 , configured to the open one of the keys (K) after the output voltage exceeds the upper voltage limit (U) and to open the other key (K) when the output voltage drops below the lower voltage limit (U). The present invention relates to systems for measuring electrical charge. Precise systems for measuring electrical charge may be used in situations when the evaluation of a medium is based on measuring the motion of a generated ...

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Номер записи: 88
20-02-2014 дата публикации

METHOD AND DEVICE FOR ANALYZING POSITIONS

Номер: US20140049270A1
Автор: CHANG CHIN-FU, Ho Shun-Lung, LEE CHENG-HAN, TANG CHI-HAO
Принадлежит: EGALAX_EMPIA TECHNOLOGY INC.

The method and device for analyzing position are disclosed. By analyzing sensing information with at least one zero-crossing, each position can be analyzed. The number of analyzed positions may be different from the number of zero-crossings. When the number of analyzed positions is different from the number of zero-crossing, the number of analyzed positions is more than one. 1. A method for analyzing positions on a touch sensitive device , executed by a microprocessor from a non-transitory computer readable storage medium , comprising:obtaining a sensing information including at least one zero-crossing, wherein each zero-crossing is between a positive and a negative value; andanalyzing from the sensing information at least one position that is different in number to the at least one zero-crossing.2. The method of claim 1 , wherein the number of the at least one zero-crossing is greater than the number of the at least one position.3. The method of claim 1 , wherein the number of the at least one zero-crossings is odd.4. The method of claim 1 , wherein the at least one position is analyzed based on zero-crossings at odd-number position.5. The method of claim 1 , wherein the number of the at least one zero-crossings is even.6. The method of claim 1 , wherein the number of the at least one zero-crossing is one claim 1 , and the number of the at least one position is two.7. The method of claim 1 , wherein the sensing information is a differential sensing information claim 1 , each value of the differential sensing information being generated based on a pair of sensors among the plurality of sensors.8. The method of claim 1 , further comprising:analyzing from the sensing information at least one position that is the same in number to the at least one zero-crossing.9. A device for analyzing positions on a touch sensitive device claim 1 , comprising a controller or a host for performing at least the following operations:obtaining a sensing information including at least one ...

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Номер записи: 89
20-02-2014 дата публикации

SELF-SHIELDING CO-PLANAR TOUCH SENSOR

Номер: US20140049271A1
Автор: Trend Matthew
Принадлежит:

In one embodiment, a touch sensor includes multiple first electrodes on a first surface. The first electrodes include a first shape. The touch sensor includes multiple second electrodes on a second surface. The second electrodes include a second shape. The touch sensor includes multiple third electrodes on the first surface that include a third shape that encompasses the second shape and are positioned on the first surface opposite the second electrodes. The touch sensor includes multiple fourth electrodes on the second surface that include a fourth shape that encompasses the first shape and are positioned on the second surface opposite the first electrodes. 1. A touch sensor comprising:a plurality of first electrodes on a first surface, wherein the first electrodes comprise a first shape;a plurality of second electrodes on a second surface, wherein the second electrodes comprise a second shape;a plurality of third electrodes on the first surface, wherein the third electrodes comprise a third shape that encompasses the second shape and are positioned on the first surface opposite the second electrodes; anda plurality of fourth electrodes on the second surface, wherein the fourth electrodes comprise a fourth shape that encompasses the first shape and are positioned on the second surface opposite the first electrodes.2. The touch sensor of claim 1 , wherein:the first electrodes are sense electrodes;the second electrodes are drive electrodes;the third electrodes are floating electrodes; andthe fourth electrodes are ground electrodes.3. The touch sensor of claim 1 , wherein the first and second surfaces are opposite surfaces of a single substrate.4. The touch sensor of claim 1 , wherein:the first surface is a surface of a first substrate; andthe second surface is a surface of a second substrate.5. The touch sensor of claim 1 , wherein:the third shape is equivalent to but larger than the second shape; andthe fourth shape is equivalent to but larger than the first shape.6 ...

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Номер записи: 90
20-02-2014 дата публикации

Capacitive Sensor

Номер: US20140049273A1
Автор: Rocznik Marko
Принадлежит: ROBERT BOSCH GMBH

A sensor includes a variable capacitor, a fixed capacitor, an inductor, a switch that electrically connects the variable capacitor with the inductor or the fixed capacitor with the inductor, an oscillator that generates a periodic signal, and a controller connected to the switch, the oscillator, and the inductor. The controller operates the switch, identifies a frequency of a first oscillation of the variable capacitor and the inductor based on the periodic signal from the oscillator, identifies a frequency of a second oscillation of the fixed capacitor and the inductor based on the periodic signal from the oscillator, and identifies a capacitance of the variable capacitor based on a ratio of the frequency of the first oscillation to the frequency of the second oscillation. 1. A sensor comprising:a variable capacitor;a fixed capacitor;an inductor;a switch configured to alternate between a first position that electrically connects the variable capacitor in a parallel electrical circuit with the inductor and a second position that electrically connects the fixed capacitor in a parallel electrical circuit with the inductor;an oscillator configured to generate a periodic signal; and operate the switch to alternate between the first position and the second position;', 'identify a frequency of a first oscillation of the variable capacitor in the parallel electrical circuit with the inductor based on the periodic signal generated by the oscillator when the switch is in the first position;', 'identify a frequency of a second oscillation of the fixed capacitor in the parallel electrical circuit with the inductor with reference to the periodic signal generated by the oscillator when the switch is in the second position; and', 'identify a capacitance of the variable capacitor based on a ratio of the frequency of the first oscillation to the frequency of the second oscillation., 'a controller operatively connected to the switch, the oscillator, and the inductor, the controller ...

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Номер записи: 91
20-02-2014 дата публикации

SYSTEM FOR MEASURING MATERIAL LEVELS USING CAPACITANCE AND TIME DOMAIN REFLECTOMETRY SENSORS

Номер: US20140049274A1
Автор: Hafer Kevin G.
Принадлежит: AMETEK, INC.

An apparatus and system for measuring levels of two or more materials maintained within a storage tank using a combination of both a capacitance sensor and a time domain reflectometry (“TDR”) waveguide sensor is disclosed. The apparatus includes a combined circuit for the capacitance sensor and TDR sensor that creates a separation between the return signal from the capacitance sensor and the TDR sensor. The need for the return signal separation is due to the generation of false reflection signals from the capacitance circuitry. In a preferred embodiment, the separation in time is created by moving the capacitance false reflections further in time than the true signal returns. An alternative preferred embodiment would delay the true TDR signals passed the capacitance false reflections. Another alternative preferred embodiment would provide a substantially matched impedance of the capacitance circuit to the TDR circuit, to substantially eliminate the false reflections. 1. An apparatus for measuring two or more levels of materials stored in a tank or vessel , comprising:a capacitance sensor and first related circuitry; anda time domain reflectometry (“TDR”) sensor and second related circuitry;wherein a separation in time between a return signal from the capacitance sensor and a return signal from the TDR sensor is created using the first and the second related circuitry.2. The apparatus for measuring two or more levels of materials stored in a tank or vessel claim 1 , as described in claim 1 , wherein the separation in time between a return signal from the capacitance sensor and a return signal from the TDR sensor is created using only the first related circuitry.3. The apparatus for measuring two or more levels of materials stored in a tank or vessel claim 1 , as described in claim 1 , wherein the separation in time between a return signal from the capacitance sensor and a return signal from the TDR sensor is created using only the second related circuitry.4. The ...

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Номер записи: 92
06-03-2014 дата публикации

SIGNAL STABILIZATION IN A NON-RESISTIVE CONTACT SENSOR ASSEMBLY

Номер: US20140062504A1
Автор: Dawson Thomas Andrew
Принадлежит: RESCON LTD

A non-resistive contact sensor assembly includes an electric field sensor device, including a dry electrode component for receiving an electrical signal from an object of interest and a signal processing component for processing the electrical signal, and a casing in which the signal processing component is surrounded or embedded. The processing component may include communications capabilities. 1. A non-resistive contact sensor assembly , comprising:(a) an electric field sensor device, including a dry electrode component for receiving an electrical signal from an object of interest by capacitively coupling with the entity;(b) a housing in which the signal processing component is surrounded or embedded; and(c) an anode and a cathode, distinct from the dry electrode component, that together provide a stable surface field, thereby allowing more focused acquisition of the electrical signal from the object of interest.2. The non-resistive contact sensor assembly of claim 1 , wherein the distinct anode and cathode are disposed in the housing with the dry electrode component.3. The non-resistive contact sensor assembly of claim 1 , wherein the distinct anode is exterior to the housing.4. The non-resistive contact sensor assembly of claim 1 , wherein the distinct cathode is exterior to the housing.5. The non-resistive contact sensor assembly of claim 1 , wherein the stable surface field is subtracted computationally during post-acquisition processing of the electrical signal from the object of interest.6. The non-resistive contact sensor assembly of claim 1 , wherein the assembly is in the form of a sensor head.7. The non-resistive contact sensor assembly of claim 1 , wherein the stable surface field is provided based upon a preliminary expectation of one or more conditions when the sensor assembly is being used.8. The non-resistive contact sensor assembly of claim 7 , wherein the stable surface field is provided by altering signal waveform.9. The non-resistive contact ...

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Номер записи: 93
06-03-2014 дата публикации

SIGNAL STABILIZATION IN A NON-RESISTIVE CONTACT SENSOR ASSEMBLY

Номер: US20140062505A1
Автор: Dawson Thomas Andrew
Принадлежит: RESCON LTD

A non-resistive contact sensor assembly includes an electric field sensor device, a cover, and a biasing structure. The electric field sensor devices has a dry electrode component for receiving an electrical signal from an object of interest by capacitively coupling with the entity. The signal processing component is surrounded or embedded in the cover. The biasing structure is disposed on the outside of the cover and is adapted to press the dry electrode component against a surface of the object interest when biased by an external structure. 1. A non-resistive contact sensor assembly , comprising:(a) an electric field sensor device, including a dry electrode component for receiving an electrical signal from an object of interest by capacitively coupling with the entity;(b) a cover in which the signal processing component is surrounded or embedded; and(c) a biasing structure, disposed on the outside of the cover, that are adapted to press the dry electrode component against a surface of the object interest when biased by an external structure.2. The non-resistive contact sensor assembly of claim 1 , wherein the biasing structure is a spring.3. The non-resistive contact sensor assembly of claim 2 , wherein the spring is a mechanical spring with a polymeric claim 2 , metallic claim 2 , and/or fiber material construction.4. The non-resistive contact sensor assembly of claim 1 , wherein the biasing structure is comprised of compressive material.5. The non-resistive contact sensor assembly of claim 4 , wherein the compressive material is selected from a group comprising rubber claim 4 , felt claim 4 , elastomeric claim 4 , polymeric claim 4 , closed cell foam and analogues.6. The non-resistive contact sensor assembly of claim 1 , arranged in a helmet that comprises the external structure.7. The non-resistive contact sensor assembly of claim 1 , arranged beneath a belt that comprises the external structure.8. The non-resistive contact sensor assembly of claim 1 , arranged ...

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Номер записи: 94
06-03-2014 дата публикации

SIGNAL STABILIZATION IN A NON-RESISTIVE CONTACT SENSOR ASSEMBLY

Номер: US20140062508A1
Автор: Dawson Thomas Andrew
Принадлежит:

A non-resistive contact sensor assembly includes an electric field sensor device, including a dry electrode component for receiving an electrical signal from an object of interest and a signal processing component for processing the electrical signal, and a casing in which the signal processing component is surrounded or embedded. The processing component may include communications capabilities. 1. A non-resistive contact sensor assembly , comprising:a dry electrode component for receiving an electrical signal from an object of interest; the signal processing component includes an A/D converter that converts the electrical signal from the object of interest to a digitized signal, and', 'the dry electrode component and signal processing component together define an electric field sensor device; and', 'a casing in which the signal processing component is surrounded or embedded., 'a signal processing component for processing the electrical signal, wherein2. The non-resistive contact sensor assembly of claim 1 , wherein the signal processing component further includes a bandwidth filter that filters the electrical signal from the object of interest prior to being converted to a digitized signal by the A/D converter for converting the electrical signal from the object of interest to a digitized signal.3. The non-resistive contact sensor assembly of claim 1 , wherein the signal processing component claim 1 , including the A/D converter claim 1 , is electrically shielded from the dry electrode component by an internal partition.4. The non-resistive contact sensor assembly of claim 3 , wherein the internal partition is provided in the form of a circuit board.5. The non-resistive contact sensor assembly of claim 3 , wherein the signal processing component is an A/D converter claim 3 , and wherein the assembly further comprises at least one additional signal processing component claim 3 , electrically shielded from the dry electrode component by the internal partition claim 3 ...

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Номер записи: 95
06-03-2014 дата публикации

Method and Apparatus to Assess the Thermal Damage Caused to a PCD Cutter Using Capacitance Spectroscopy

Номер: US20140062509A1
Автор: Bellin Federico, Chintamaneni Vamsee
Принадлежит: Varel International Ind., L.P.

A method and apparatus for non-destructively determining the wear resistance of an ultra-hard polycrystalline structure after being coupled to a downhole tool using capacitance measurements. The apparatus includes a capacitance measuring device having a positive and negative terminal, a leached component comprising a polycrystalline structure that has been coupled to a downhole tool, a first wire, and a second wire. The first wire electrically couples the positive terminal to a surface of the leached component and the second wire electrically couples the negative terminal to a surface of the downhole tool. The capacitance is measured for the leached component one or more times and compared to a calibration curve that shows a relationship between capacitance values and wear resistance, thereby allowing determination of an estimated wear resistance for the polycrystalline structure. 1. A capacitance measuring system , comprising:a capacitance measuring device comprising a positive terminal and a negative terminal;a downhole tool;a leached component coupled to the downhole tool and comprising a polycrystalline structure, the polycrystalline structure comprising a leached layer and an unleached layer positioned adjacent to the leached layer, the leached layer having at least a portion of a catalyst material removed from therein;a first wire electrically coupling the positive terminal to the leached layer of the leached component; anda second wire electrically coupling the negative terminal to a portion of the downhole tool,wherein the capacitance measuring device measures a capacitance of the leached component.2. The capacitance measuring system of claim 1 , wherein the capacitance measuring device comprises a multi-meter claim 1 , the multi-meter being capable of measuring the capacitance while varying a frequency.3. The capacitance measuring system of claim 1 , wherein the frequency is variable with a range selected between 100 kilohertz to 10 megahertz.4. The ...

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Номер записи: 96
13-03-2014 дата публикации

THIN FILM SENSOR, CAPACITIVE TOUCH PANEL HAVING THE SAME AND PREPARATION METHOD THEREOF AND TERMINAL PRODUCT

Номер: US20140070821A1
Автор: Cheng Zhizheng, Meng Kai, TANG Genchu
Принадлежит: SHENZHEN O-FILM TECH CO., LTD.

The present invention relates to a thin film sensor, capacitive touch panel having the sensor and preparation method thereof and terminal product. The thin film sensor of the present invention has only one optically conductive substrate. Specifically, only one optically transparent substrate is used, a sensing electrode layer and a driving electrode layer are coated on the upper and lower surfaces of the substrate, respectively, which helps to reduce the thickness of the thin film sensor on one hand, thus contributes to the development of light and thin of a touch panel and touch electronics; on the other hand, the material selection and the preparation process are simple, the selection of two substrates is not necessary to prepare two optically conductive thin film. 1. A thin film sensor used in the capacitive touch panel , comprising a sensing electrode layer , and a driving electrode layer , and an optically transparent substrate;wherein the substrate has two surfaces, the sensing electrode layer and the driving electrode layer are coated on the two surfaces, respectively;the substrate comprises a first thin film coated with the sensing electrode layer, a second thin film coated with the driving electrode layer, and an optically transparent adhesive member located between the first thin film and the second thin film;the first film and the second film are bonded by the adhesive member.2. The thin film sensor according to claim 1 , wherein the first thin film and the second thin film are both made of PET claim 1 , the first thin film and the second thin film are bonded by optical glue.3. The thin film sensor according to claim 1 , wherein the thickness of the substrate is in the range of 0.05 to 0.2 mm.4. The thin film sensor according to claim 1 , wherein the sensing electrode layer and the driving electrode layer are both provided with metal electrode traces on surfaces thereof away from the substrate.5. A capacitive touch panel claim 1 , comprising a cover lens ...

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Номер записи: 97
13-03-2014 дата публикации

CAPACITIVE CONTROL INTERFACE DEVICE HAVING DISPLAY INTEGRATION

Номер: US20140070823A1
Автор: Roziere Didier
Принадлежит: NANOTEC SOLUTION

A capacitive detection control interface device is provided, including at least one measurement electrode including an active surface, a guard made from an electrically conductive material placed adjacent to the measurement electrodes, the guard is excited up to an alternating electric potential substantially identical to that of the measurement electrodes, a first electronic component for exciting the electrodes and processing the measurement signals from the capacitive coupling of the electrodes with an object laced adjacent thereto, the electronic component is at least partly referenced to the electric potential of the guard, and a second electronic component for performing another functional display, placed adjacent to the active surface which second electronic component is at least partly referenced to the electric potential of the guard. 1. A capacitive control interface device comprising:at least one measurement electrode including an active surface;a guard made from an electrically conductive material placed adjacent to said at least one measurement electrodes which guard is excited up to an alternating electric potential substantially identical to that of the at least one measurement electrode;first electronic means for exciting the at least one electrode and processing the measurement signals from the capacitive coupling of said at least one electrode with an object placed adjacent thereto, which electronic means are at least partly referenced to the electric potential of the guard;second electronic means for performing a display, placed adjacent to said active surface, and at least partly referenced to the electric potential of the guard.2. The device according to claim 1 , wherein the second electronic means comprises a display screen.3. The device according to claim 2 , wherein the display screen comprises at least one of the following components:liquid crystals (LCD),organic light emitting diodes (OLED).4. The device according to claim 2 , which ...

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Номер записи: 98
13-03-2014 дата публикации

Noise Detection and Correction Routines

Номер: US20140074436A1
Автор: Davison Burke, Voris Andrew
Принадлежит:

A system for reducing noise in a sensor measurement system includes a noise detector for detecting noise in capacitive to digital conversion measurements; a noise correction module operably coupled to the noise detector and configured to dynamically modify one or more delays associated with a sampling waveform; and a noise filter for filtering the sampling waveform. 1. A method for reducing noise in a sensor measurement system , comprising:performing capacitive to digital conversion measurements,detecting that the sensor measurement system is experiencing noise,dynamically modifying one or more delays associated with a sampling waveform.2. A method in accordance with claim 1 , wherein the one or more delays comprise one or more delays in a time between samples of the sampling waveform.3. A method in accordance with claim 1 , wherein the one or more delays comprise one or more delays in a time between an end of a one sampling waveform and the start of a next sampling waveform.4. A method in accordance with claim 1 , wherein the one or more delays comprise one or more delays in an acquisition time of a sample.5. A method in accordance with claim 1 , wherein detecting that the sensor measuring system is experiencing noise comprises performing noise scans and determining a summed mean difference between sets of measurements.6. A method in accordance with claim 1 , wherein detecting that the sensor measuring system is experiencing noise comprises performing noise scans and determining if a measurement is asymmetrical.7. A method in accordance with claim 1 , further comprising filtering the sampling waveform.98. A system in accordance with claim claim 1 , wherein the one or more delays comprise one or more delays in a time between samples of the sampling waveform.108. A system in accordance with claim claim 1 , wherein the one or more delays comprise one or more delays in a time between an end of a one sampling waveform and the start of a next sampling waveform.118. A ...

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Номер записи: 99
20-03-2014 дата публикации

HIGH SIGNAL TO NOISE RATIO CAPACITIVE SENSING ANALOG FRONT-END

Номер: US20140077823A1
Автор: Angelini Paolo, Guedon Yannick, Guo Dianbo, Lasalandra Ernesto, Tan Kien Beng, Tan Sze-Kwang, Tripoli Giovanni Carlo, Ungaretti Tommaso
Принадлежит:

Capacitance sensing circuits and methods are provided. The capacitance sensing circuit includes a capacitance-to-voltage converter configured to receive a signal from a capacitance to be sensed and to provide an output signal representative of the capacitance, an output chopper configured to convert the output signal of the capacitance-to-voltage converter to a sensed voltage representative of the capacitance to be sensed, an analog accumulator configured to accumulate sensed voltages during an accumulation period of NA sensing cycles and to provide an accumulated analog value, an amplifier configured to amplify the accumulated analog value, and an analog-to-digital converter configured to convert the amplified accumulated analog value to a digital value representative of the capacitance to be sensed. The analog accumulator may include a low pass filter having a frequency response to filter wideband noise. 1. A capacitance sensing circuit comprising:a capacitance-to-voltage converter configured to receive a signal from a capacitance to be sensed and to provide an output signal representative of the capacitance;an output chopper configured to convert the output signal of the capacitance-to-voltage converter to a sensed voltage representative of the capacitance to be sensed;an analog accumulator configured to accumulate sensed voltages during an accumulation period of NA sensing cycles and to provide an accumulated analog value;an amplifier configured to amplify the accumulated analog value; andan analog-to-digital converter configured to convert the amplified accumulated analog value to a digital value representative of the capacitance to be sensed.2. A capacitance sensing circuit as defined in claim 1 , wherein the analog accumulator includes a low pass filter having a frequency response to filter wideband noise.3. A capacitance sensing circuit as defined in claim 2 , wherein the frequency response of the low pass filter is programmable to provide a selected ...

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Номер записи: 100