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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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Применить Всего найдено 5799. Отображено 100.
22-03-2012 дата публикации

Rms and envelope detector

Номер: US20120071125A1
Автор: Abdullah Celik, Savas Tokmak, Yalcin A. Eken
Принадлежит: Hittite Microwave LLC

Disclosed herein are power detectors and methods for detecting the average power level of an RF input signal and the voltage envelope of the RF input signal. Also disclosed herein are linear envelope detectors and methods for detecting the voltage envelope of an RF input signal.

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Номер записи: 1
28-02-2013 дата публикации

True rms power measurement

Номер: US20130049841A1
Автор: Frederic Roger
Принадлежит: Scintera Networks LLC

Systems and methods are provided for power measurement of signals such that the power measurement is insensitive to PVT variations of the measurement systems. A power measurement system includes an analog squarer circuitry, an integrating ADC, and a controller. The squarer circuitry calculates the power of a signal whose power is to be measured while the integrating ADC integrates the calculated power over a runup interval to generate an integrated power. The squarer circuitry also calculates the power of a reference for the integrating ADC to de-integrate the integrated power over a rundown interval. The power measurements are independent of PVT variations of the analog squarer circuitry and integrating ADC. The controller digitally controls the runup interval and measures the rundown interval to provide digitized power measurements. The analog squarer circuitry have replica squarer circuits. Process dependent mismatches between the replica analog circuitry may be removed through a calibration process.

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Номер записи: 2
23-05-2013 дата публикации

CHEMICAL SENSOR

Номер: US20130130261A1
Автор: PRODROMAKIS Themistoklis, TOUMAZOU Christofer
Принадлежит: VAGONYX LIMITED

A sensor comprising a memory device having a first electrode and a first chemical-sensing layer coupled to the first electrode. The chemical-sensing layer, in the presence of an analyte, is arranged to change a property of the Memristive device. The sensor can detect an analyte by providing a sample to be detected proximate the chemical sensing layer, observing the state of the memory element; and determining a property of the sample by comparing the observed state of the memory element with a previous state. The sensor is manufactured by depositing a second electrode on a surface, depositing an active layer or layers onto said second electrode, depositing a first electrode onto said active layer(s), and coupling a chemically sensitive layer to the first electrode. 1. A sensor comprising:a memory device having a first electrode and a second electrode; anda first chemical-sensing layer coupled to the first electrode, arranged such that in use ions proximate the chemical-sensing layer provide an electrostatic potential to change a property of the memory device.2. A sensor according to claim 1 , wherein the first chemical-sensing layer is electrically connected to the first electrode such that charges proximate the chemical-sensing layer provide an electrostatic potential between the first electrode and the second electrode of the memory device.3. A sensor according to claim 1 , wherein the first chemical-sensing layer is electrostatically coupled to the first electrode such that charges proximate the chemical-sensing layer provide an electrostatic potential between the first electrode and the second electrode of the memory device.4. A sensor according to claim 1 , wherein the memory device is one of a Memristor claim 1 , Memcapacitor claim 1 , or Meminductor.5. A sensor according to claim 1 , further comprising a first circuit to determine the property of the memory device.6. A sensor according to claim 5 , wherein the first circuit comprises means to provide a signal ...

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Номер записи: 3
06-06-2013 дата публикации

CURRENT METER

Номер: US20130141077A1
Автор: Keselman Paul, Wellenstein Hermann F.
Принадлежит: BRANDEIS UNIVERSITY

Apparatus, usable to measure current in a multiple-conductor cable having supply and return conductors spaced apart by a nominal conductor spacing and carrying respective supply and return currents in opposite directions, includes (1) a non-magnetic body having a cable-engaging portion defining a location and an orientation axis of the multiple-conductor cable relative to the apparatus when the cable-engaging portion engages the cable during use, (2) a planar, multi-turn wire coil supported by the body immediately adjacent to the location and lying in a plane parallel to the orientation axis, the wire coil having a coil diameter at least four times the nominal conductor spacing, and (3) signal conditioning circuitry operative in response to a voltage signal developed across output ends of the wire coil to generate a conditioned voltage signal having a voltage magnitude determined by and indicative of a magnitude of the supply current during use. 1. Apparatus for use in measuring alternating current in a multiple-conductor cable having supply and return conductors spaced apart by a nominal conductor spacing and carrying respective supply and return currents in opposite directions , comprising:a non-magnetic body having a cable-engaging portion defining a location and an orientation axis of the multiple-conductor cable relative to the apparatus when the cable-engaging portion engages the cable during use;a planar, multi-turn wire coil supported by the body immediately adjacent to the location and lying in a plane parallel to the orientation axis, the wire coil having a coil diameter at least four times the nominal conductor spacing; andsignal conditioning circuitry operative in response to a voltage signal developed across output ends of the wire coil to generate a conditioned voltage signal having a voltage magnitude determined by and indicative of a magnitude of the supply current during use.2. Apparatus according to claim 1 , wherein the coil is disposed ...

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Номер записи: 4
13-06-2013 дата публикации

CURRENT SENSOR AND ASSEMBLED BATTERY

Номер: US20130147463A1
Автор: Hirai Hiroki, Kinoshita Yuko, Misaki Takashi, Nishi Kouji, Takase Shinichi, Takata Kensaku
Принадлежит:

There are provided a deformed bus bar for electrically connecting terminals of adjacent battery cells in an assembled battery, a core having both ends opposed to each other across a clearance and continuously formed around a hollow portion through which a part of the deformed bus bar penetrates, and a Hall IC disposed in the clearance for outputting an electric signal depending on a magnetic flux. 1. A current sensor comprising:a conductor for electrically connecting terminals of adjacent battery cells in an assembled battery;a magnetic material core having both ends opposed to each other across a clearance and continuously formed around a hollow portion through which a part of said conductor penetrates; anda magneto-electric converting element disposed in said clearance for outputting an electric signal depending on a magnetic flux.2. The current sensor according to claim 1 , whereinsaid conductor is formed by extending from one of said two adjacent terminals toward the other and said conductor includes an erected portion formed in a direction crossing a terminal formation surface which is a surface on which said terminal is provided in said battery cell in a middle thereof, andsaid erected portion penetrates through the hollow portion of said magnetic material core.3. The current sensor according to claim 2 , whereinsaid conductor includes:two said erected portions; anda bridge portion laid between said two erected portions for connecting said erected portions, andone of said two erected portions penetrates through the hollow portion of said magnetic material core.4. The current sensor according to claim 3 , wherein said magneto-electric converting element is disposed between said bridge portion and said terminal formation surface.5. The current sensor according to claim 1 , whereinsaid conductor includes:two terminal corresponding portions making contact with said two adjacent terminals respectively;two first extended portions formed by extending in a second ...

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Номер записи: 5
13-06-2013 дата публикации

Systems And Methods For Determining Current Flow Through A Utility Asset

Номер: US20130151187A1
Автор: Divan Deepakraj M., Lambert Franklin, Moghe Rohit
Принадлежит: GEORGIA TECH RESEARCH CORPORATION

The present invention describes systems and methods for determining current flow through a current-carrying utility asset. An exemplary embodiment can include measuring a first magnetic induction value at a first location near a targeted current-carrying utility asset and a second magnetic induction value at a second location near the targeted asset where the first location is a known distance from the second location; determining a correlation between a spatial angle and an electrical phase angle between the targeted asset and a second asset where the second asset contributes a first and second error component to the first and second magnetic induction values respectively; estimating error values for the first and second error components using the correlation between the spatial angle and the electrical phase angle; and estimating a current flowing through the targeted asset using the first and second magnetic induction values, the known distance, and the error values. 1. A method for determining current flowing through a nearby current-carrying utility asset in the vicinity of other current-carrying utility assets comprising:measuring a first magnetic induction value having a first error component at a first location near a targeted current-carrying utility asset and a second magnetic induction value having a second error component at a second location near the targeted current-carrying utility asset, the first location being a known distance from the second location;determining a correlation between a spatial angle and an electrical phase angle between the targeted current-carrying utility asset and a second current-carrying utility asset, the second current-carrying utility asset contributing the first error component and the second error component;estimating error values for the first error component and the second error component using the correlation between the spatial angle and the electrical phase angle;estimating a current flowing through the targeted ...

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Номер записи: 6
20-06-2013 дата публикации

CURRENT SENSOR

Номер: US20130154631A1
Автор: TAMURA Manabu
Принадлежит: ALPS GREEN DEVICES CO., LTD.

A current sensor includes: a conductive member through which a current to be measured flows; first and second magnetic sensors which output output signals having reversed phases to each other due to an induction magnetic field from the current to be measured; and a control unit which performs differential operation on the output signal of the first magnetic sensor and the output signal of the second magnetic sensor, wherein sensing axis directions of the first magnetic sensor and the second magnetic sensor are fixed in the same direction, form a predetermined angle with respect to an application direction of the induction magnetic field from the current to be measured applied to the first magnetic sensor and the second magnetic sensor, and are fixed so that the induction magnetic fields are applied to the first magnetic sensor and the second magnetic sensor in reverse directions to each other. 1. A current sensor comprising:a conductive member through which a current to be measured flows;a first magnetic sensor and a second magnetic sensor which output output signals having reversed phases to each other due to an induction magnetic field from the current to be measured; anda differential unit which performs differential operation on the output signal of the first magnetic sensor and the output signal of the second magnetic sensor,wherein sensing axis directions of the first magnetic sensor and the second magnetic sensor are fixed in the same direction, form a predetermined angle with respect to an application direction of the induction magnetic field from the current to be measured applied to the first magnetic sensor and the second magnetic sensor, and are fixed so that the induction magnetic fields are applied to the first magnetic sensor and the second magnetic sensor in reverse directions to each other,a substrate having the first magnetic sensor disposed on one surface and the second magnetic sensor disposed on the other surface is included,the conductive ...

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Номер записи: 7
20-06-2013 дата публикации

System and method for ground fault detection and fault type evaluation

Номер: US20130154660A1
Автор: Andrei Bucsa, Aurel Cojocaru, Stephen D. W. Fosty
Принадлежит: Tyco Safety Products Canada Ltd

The embodiments disclose a circuit for detecting and determining a type of ground fault in a security system. An operational amplifier (OA) having positive and negative inputs and an output may receive AC input signals having different frequencies, f 1 and f 2 at a positive input and provide an AC output signal at the output. An OA feedback loop may comprise a ground fault equivalent impedance connected at the OA negative input and a feedback resistor connected between the OA output and the OA negative input. A rectifier may convert the AC output signal to a DC signal and a filter to obtain a steady DC voltage from the rectified DC signal. A steady DC voltage for two different AC input signals may be obtained and converted to a relative voltage with respect to a constant input voltage amplitude. The relative voltages may be compared to detect and determine a type of ground fault condition.

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Номер записи: 8
20-06-2013 дата публикации

Power quality monitoring apparatus and method thereof

Номер: US20130158909A1
Автор: Jung Hoo LEE, Kyung Uk Kim, Wan Cheol Yang
Принадлежит: Samsung Electro Mechanics Co Ltd

The present invention includes a calculating unit for calculating an absolute value of an applied commercial voltage, an accumulating unit for accumulating the absolute value of the applied commercial voltage per a constant period to output, an extracting unit for sampling an absolute value accumulative maximum value of the commercial voltage for each period and a determining unit for determining a quality of the commercial voltage by using the absolute value accumulative maximum value of the sampled commercial voltage. It has an advantage that the power quality can be monitored at high speed.

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Номер записи: 9
20-06-2013 дата публикации

Pulse width modulated voltage measuring circuit and method

Номер: US20130158920A1
Автор: Andrei Bucsa, Stephen D. W. Fosty
Принадлежит: Tyco Safety Products Canada Ltd

A voltage measuring circuit includes a rectifier to receive an alternating current (AC) voltage to be measured and to provide a rectified output; a comparator for comparing the rectified output and producing therefrom a square wave having a pulse width indicative of the rectified output exceeding a threshold; a calculation circuit for converting a measurement of the pulse width into a measurement of the voltage and optionally an opto-isolator interconnecting the comparator to the calculation circuit. The rectifier may provide operating power to the comparator and an input side of the opto-isolator, from the AC voltage signal being measured. The remainder of the measuring circuit may powered by a source isolated from the voltage to be measured.

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Номер записи: 10
27-06-2013 дата публикации

PEAK VOLTAGE DETECTOR AND RELATED METHOD OF GENERATING AN ENVELOPE VOLTAGE

Номер: US20130162296A1
Автор: Cantoro Claudio, Gravati Mirko
Принадлежит: STMICROELECTRONICS S.R.L.

A peak detector circuit receives an oscillating power supply signal. A capacitor is selectably coupled to the signal and charged to a value corresponding to a peak value of the signal. A switch is then opened to isolate the capacitor. A comparator continually compares the signal with the value stored on the capacitor. When the signal rises to within a selected threshold, relative to the stored value, the comparator produces a command signal to close the switch, again coupling the capacitor to the signal. The peak detector can also include a tracking circuit that controls the capacitor to track the oscillating signal while the switch is closed, a timer circuit configured to close the switch and activate the tracking circuit if more than a selected time passes without production of a command signal, and a circuit configured to control the polarity of a leakage current of the capacitor. 1. An integrated detector of peaks of an oscillating voltage , comprising:a rectifying circuit, having an input and an output, configured to generate an rectified voltage at the output corresponding to an oscillating voltage at the input;an integrated capacitor configured to store an envelope voltage representing a last detected peak value of the oscillating voltage;a first switch configured to electrically couple said integrated capacitor to the output of the rectifying circuit when the first switch is closed, and to isolate the integrated capacitor from the rectifying circuit when the first switch is open;a comparator configured to compare the envelope voltage with the oscillating voltage, and to generate a command signal that closes said first switch when a difference between the envelope voltage and the oscillating voltage is smaller than a first offset voltage.2. The detector of claim 1 , comprising a clamping circuit configured to clamp said envelope voltage to an instantaneous value of the oscillating voltage claim 1 , the clamping circuit including:a timer configured to be ...

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Номер записи: 11
27-06-2013 дата публикации

PEAK VOLTAGE DETECTOR AND RELATED METHOD OF GENERATING AN ENVELOPE VOLTAGE

Номер: US20130162297A1
Автор: Cantoro Claudio, Gravati Mirko
Принадлежит: STMICROELECTRONICS S.R.L.

A peak detector circuit receives an oscillating power supply signal. A capacitor is selectably coupled to the signal and charged to a value corresponding to a peak value of the signal. A switch is then opened to isolate the capacitor. A comparator continually compares the signal with the value stored on the capacitor. When the signal rises to within a selected threshold, relative to the stored value, the comparator produces a command signal to close the switch, again coupling the capacitor to the signal. The peak detector can also include a tracking circuit that controls the capacitor to track the oscillating signal while the switch is closed, a timer circuit configured to close the switch and activate the tracking circuit if more than a selected time passes without production of a command signal, and a circuit configured to control the polarity of a leakage current of the capacitor. 1. An integrated detector of peaks of an oscillating voltage , comprising:a rectifying circuit, having an input and an output, configured to generate an rectified voltage at the output corresponding to an oscillating voltage at the input;an integrated capacitor configured to store an envelope voltage representing a last detected peak value of the oscillating voltage;a first switch configured to electrically couple said integrated capacitor to the output of the rectifying circuit when the first switch is closed, and to isolate the integrated capacitor from the rectifying circuit when the first switch is open;a comparator configured to compare the envelope voltage with the oscillating voltage, and to generate a command signal that closes said first switch when a difference between the envelope voltage and the oscillating voltage is smaller than a first offset voltage.2. The detector of claim 1 , comprising a clamping circuit configured to clamp said envelope voltage to an instantaneous value of the oscillating voltage claim 1 , the clamping circuit including:a timer configured to be ...

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Номер записи: 12
25-07-2013 дата публикации

CURRENT SENSOR

Номер: US20130187633A1
Автор: IWASE Eiichiro, KAMIYA Akira, KATO Manabu, OKUMURA Ken, YASUI Akihiro
Принадлежит: AISIN SEIKI KABUSHIKI KAISHA

Provided is a current sensor including at least three bus bars made of flat-plate-shaped conductors and an inverter, a plurality of cores in which a core is formed by stacking flat plates made of U-shaped magnetic bodies, and a detecting element arranged on the side of an opening portion of each of the cores for detecting the intensity of a magnetic field, that the interval between the core and another bus bar that is adjacent to the bus bar inserted into the U groove of the core becomes 1/2 of the length of the opening portion in the spacing direction, and the tolerance of the gap is set to a value obtained by subtracting the value of 3/2 of the length of the opening portion in the spacing direction from the value of the interval between the bus bars that are adjacent to each other, with the gap as a median value. 1. A current sensor comprising:at least three bus bars that are made of flat-plate-shaped conductors that connect a three-phase motor and an inverter that energizes the three-phase motor and that are provided side by side along a direction parallel to the thickness of the flat plate shape;a plurality of cores in which a core is formed by stacking flat plates made of U-shaped magnetic bodies and in which each of the bus bars is inserted into the inside a U-shaped U groove of the core formed by stacking the flat plates so that the face of the bus bar in a plate width direction and the face of a side wall inside the U-shaped U groove of the core formed by stacking the flat plates become parallel to each other; anda detecting element that is arranged on the side of an opening portion of each of the cores so that a detection direction thereof runs along a spacing direction of the opening portion and detects the intensity of a magnetic field,wherein the core is configured so that the interval between the core and another bus bar that is adjacent to the bus bar inserted into the U groove of the core as viewed in the axial direction of the bus bar becomes 1/2 of ...

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Номер записи: 13
25-07-2013 дата публикации

MONITORING DEVICE AND METHOD FOR MONITORING A LINE SECTION USING A MONITORING DEVICE

Номер: US20130187634A1
Автор: ALBRECHT Stefan
Принадлежит: Micronas GmbH

A monitoring device is provided that includes a first line section with a first connection point and a second connection point spaced apart from the first connection point in the direction of the line, and with a control unit and with a first current sensing unit, having a current source. A first switch is inserted into the first connecting line and connects the first current source to the first connection point or disconnects it therefrom. In a first state the first switch is closed and the first current is impressed on the first line section and a first voltage determined by the amplitude of the actual current, and in a second state the first switch is open and a second voltage is determined, and the control unit is configured to ascertain the amplitude of the first actual current from the two voltages. 1. A monitoring device comprising:a first line section with a first connection point and a second connection point spaced apart from the first connection point in a direction of the line;a control unit; a first current source connectable to the first connection point via a first connecting line and connectable to the second connection point via a second connecting line, the first current source being configured to output a first current;', 'a first switch having a control input, the first switch being inserted into the second connecting line and being configured to connect or disconnect the first current source to the second connection point; and', 'a first differential amplifier having a first input, a second input, and an output, the first input being connectable to the first connection point via a third connecting line, the second input being connectable to the second connection point by a fourth connecting line;, 'a first current sensing unit comprisingwherein the control unit is inserted between the output of the first differential amplifier and the control input of the first switch,wherein an actual current is passed through the first line section,wherein, in ...

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Номер записи: 14
01-08-2013 дата публикации

CURRENT DETECTING DEVICE

Номер: US20130193954A1
Автор: Chaen Satoru, Nakajima Hirokatsu
Принадлежит: SUMITOMO WIRING SYSTEMS, LTD.

A current detecting device is readily attached to a wire while preventing variation in current detection accuracy. A current detecting device has a core module and an element module, the core module having a core support that supports a magnetic core, the element module having an element support that supports a Hall element therein. In a position of a gap of the magnetic core in the core module, a wire insertion path is provided, to which the element support is fitted. Two end portions of the magnetic core and the Hall element are positioned by first and second contact surfaces of the core support and by a third contact surface of the element support. The two modules are connected so as to be movable relative to each other and are fixated by a lock mechanism in a state where the element support is fitted to the wire insertion path. 1. A current detecting device comprising:a magnetic core having two ends opposite to each other with a gap therebetween and continuously surrounding a hollow portion;a magnetoelectric transducer provided in a position of the gap of the magnetic core and detecting a magnetic flux that varies in response to a current passing through the hollow portion of the magnetic core; a core support supporting the magnetic core; and', 'a wire insertion path provided in the position of the gap of the magnetic core and extending from an exterior of the magnetic core to the hollow portion of the magnetic core;, 'a first module comprising 'an element support in an interior thereof supporting the magnetoelectric transducer; and', 'a second module having an outer shape fitting the wire insertion path of the first module and comprisinga lock mechanism fixating the second module to the first module in a state where the element support is fitted to the wire insertion path in contact with a surface on an exterior of each of two end portions of the magnetic core.2. The current detecting device according to claim 1 , whereinthe core support is a portion provided ...

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Номер записи: 15
01-08-2013 дата публикации

CIRCUIT BREAKER METERING SYSTEM

Номер: US20130197835A1
Автор: Axelsson Halldor, Einarsson Ragnar, Jonsson Bjarni Malmquist, Jonsson Hilmir Ingi, Olafsson Jon Thor
Принадлежит: RE-MAKE ELECTRIC EHF

A system of using electrical detection and reporting devices in conjunction with existing electrical protection devices by an electrical installation, wherein the said measuring devices are used by existing circuit breakers and terminal blocks to measure and identify electrical load and residual current in said electrical installation. The system measures residual current, current and voltage and displays information on said measurements by LEDs wherein the system consists of using a dedicated CPU for collecting, analysing and transmitting the data of the system through wireless and Ethernet/internet connections. 1. An electrical detection and reporting device to be used in combination with electrical protection devices , the electrical detection and reporting device comprising:a housing,an electrical detection unit, andan input/output means,CHARACTERIZED IN THAT,the electrical detection and reporting device is electrically connectable to the electrical protection device,the electrical detection and reporting device is electrically connected to a CPU via a linking unit,the electrical detection and reporting device is adapted to be energized from the CPU by the input means of the electrical detection and reporting device,the electrical detection and reporting device comprises an electronic circuit to measure current and residual current by said at least one electrical protection device,and the electrical detection and reporting device communicates electrical load from at least one electrical protection device to the CPU via said linking unit, the CPU adapted to monitor the load and delivers data to a user on the electrical load in the at least one electrical protection device.2. The electrical detection and reporting device according to claim 1 , wherein the CPU is an integrated part of the electrical detection and reporting device and contained within the housing.3. The electrical detection and reporting device according to claim 1 , wherein the CPU is an external ...

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Номер записи: 16
08-08-2013 дата публикации

METHOD AND SYSTEM FOR DETECTION OF STANDBY STATUS IN LINEAR AND NON-LINEAR CHARGES CONNECTED TO THE ELECTRICITY MAINS AND AUTOMATIC DISCONNECTION THEREOF

Номер: US20130200880A1
Автор: BARTOLOMÉ GARCÍA Jesús, BERGAS JANÉ Joan Gabriel, SUDRIÀ ANDREU Antoni, TEIXIDO CASAS Miquel, ZABALEGUI LABARTA José Angel
Принадлежит: GOOD FOR YOU GOOD FOR THE PLANET, S.L.

The method permits the detection of ‘standby’ state’ in linear and non-linear loads connected to the power grid and their automatic disconnection, and comprises at least the detection of the normal operating state of at least one load by means of detection, and obtaining the maximum value of the current in said operating state for the determination of the ‘standby state’ of the at least one load. 122.-. (canceled)23. A method of determining the maximum value of a current in at least one load in a normal operating state , said method comprising:i) obtaining a first current value in the at least one load;ii) obtaining a later current value in the at least one load after a pre-established interval of time I;iii) determining if the later current value is greater than the first current value;iv) storing the greater of the first current value and the later current value in memory; andv) repeating stages i) to iv) a pre-determined number N times.24. The method of claim 23 , wherein the pre-established interval of time I is between 0.1 ms and 1 ms.25. The method of claim 24 , wherein the pre-established interval of time I is 0.5 ms.26. The method of claim 23 , wherein the pre-determined number N is between 20 and 200.27. The method of claim 26 , wherein the pre-determined number N is 40.28. The method of claim 23 , wherein stages i) to v) for obtaining the maximum value of the current of a load in normal operating state are repeated a number of times M and the average of all the maximum current values obtained is determined.29. The method of claim 28 , wherein M is between 2 and 16.30. The method of claim 29 , wherein M is 8.31. A method for the detection of ‘standby’ state’ in linear and non-linear loads connected to the power grid claim 29 , said method comprising:a. obtaining a maximum start-up current value in each at least one load;b. obtaining a maximum current value in each at least one load at a specific moment;{'claim-ref': {'@idref': 'CLM-00023', 'claim 23'}, 'c. ...

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Номер записи: 17
22-08-2013 дата публикации

SYSTEM AND METHOD FOR COLLECTION, ANALYSIS AND ARCHIVING OF PIPE DEFECT DATA

Номер: US20130218485A1
Автор: Hansen Charles, Harris Robert Jackson
Принадлежит: Electro Scan, Inc.

The system utilizes electroscan equipment including a voltage source and current meter with a cable having one end grounded and one end having an electric probe thereon sized to fit within an underground pipe. The probe is able to complete an electric circuit back to ground when the probe is adjacent a defect through which electric currents can pass, thus producing varying electric current. A cable reel is provided with portions of the cable supported thereon and with a cable distance sensor coupled to the reel along with the current meter and voltage source in the form of a battery. The current meter and distance sensor transmit wireless signals to an on-site processor, such as a smartphone, for on-site data evaluation. Such unconditioned data is also transmitted to a remote location for conditioning of the data and retransmission of the conditioned data back to the on-site processor. 1: A system for collection , analysis and archiving of pipe defect data , comprising in combination:an electric probe sized to fit within an underground pipe;an electrically conductive cable having a proximal end and a distal end, said distal end electrically attached to said probe;a voltage source coupled to said cable and spaced from said probe;a ground interface coupled to said proximal end of said cable;an electric meter positioned to measure an electric signal in a circuit including said cable, said voltage source and said ground interface, said electric signal correlating with defects in the pipe adjacent to said probe;at least two data processors including an on-site processor and a remote processor;said on-site processor including a display for unconditioned data and a transmitter coupleable with the remote processor;said remote processor including a processor, memory and software adapted to condition said data to enhance data usefulness and a transmitter capable of sending data back to said on-site processor; andsaid on-site processor adapted to display conditioned data.2: ...

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Номер записи: 18
26-09-2013 дата публикации

METHODS AND DEVICES FOR ELECTRONIC SENSING

Номер: US20130252234A1
Автор: Facer Greoffrey, Nassef Hany, Unger Marc
Принадлежит: Fluidigm Corporation

The presence of a detectable entity within a detection volume of a microfabricated elastomeric structure is sensed through a change in the electrical or magnetic environment of the detection volume. In embodiments utilizing electronic detection, an electric field is applied to the detection volume and a change in impedance, current, or combined impedance and current due to the presence of the detectable entity is measured. In embodiments utilizing magnetic detection, the magnetic properties of a magnetized detected entity alter the magnetic field of the detection volume. This changed magnetic field induces a current which can reveal the detectable entity. The change in resistance of a magnetoresistive element may also reveal the passage of a magnetized detectable entity. 123-. (canceled)24. A method of detecting entities of a selected entity type in a microfabricated structure , wherein the entity type is selected from bacterial cells , mammalian cells , viral particles , macromolecules , and ensembles of macromolecules , the method comprising:(a) providing a microfabricated structure comprising a plurality of flow channels each having a detection volume with selected physical dimensions and width;(b) applying an electric field across the detection volume;(c) flowing a fluid containing a plurality of entities of the selected entity type through the detection volume at a selected flow rate;(d) measuring a change in current and/or voltage of the applied electric field resulting from one of the entities in the fluid passing through and past the detection volume; and(e) correlating the change(s) with the presence of an entity of the selected entity type within the flow channel,wherein the method comprises selecting a microfabricated structure having the physical dimensions and width of the detection volume specified in step (a), in conjunction with a flow rate of the fluid through the detection volume specified in step (c), such that the combination of the physical ...

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Номер записи: 19
05-12-2013 дата публикации

NOISE VARIANCE ESTIMATION AND INTERFERENCE DETECTION

Номер: US20130322425A1
Автор: El-Hajjar Mohammed, Murrin Paul
Принадлежит: IMAGINATION TECHNOLOGIES LIMITED

Noise variance estimation and interference detection is described. In one example, a method of estimating noise variance is described in which the pilots within a received OFDM signal are divided into bands and then a noise variance estimate is calculated on a per-band basis by averaging the noise estimates for those pilots within the band. In some examples, the pilots are divided into bands in frequency and in other examples, the pilots are divided into bands in frequency and time, such that noise estimates from more than one OFDM symbol are used in calculating the per-band noise variance estimates. The noise variance estimate for a pilot is then set to the noise variance estimate for the band which contains the pilot. The noise variance estimate for a data sub-carrier can then be determined by interpolating between the values for the pilots. 1. A method of estimating noise variance within an OFDM receiver , the method comprising:evaluating a noise estimate for each of a plurality of pilots within one or more received OFDM symbols;dividing the plurality of pilots into bands;calculating a noise variance estimate for each band by averaging noise estimates for pilots within the band;storing the noise variance estimate for each band in memory;setting a noise variance estimate for a pilot equal to the calculated noise variance estimate for the band which includes the pilot; anddetermining a noise variance estimate for a data sub-carrier within the one or more received OFDM symbols by interpolating between the noise variance estimates for each pilot.2. A method according to claim 1 , wherein calculating a noise variance estimate for each band comprises averaging noise estimates for pilots within the band from a single received OFDM symbol.3. A method according to claim 1 , wherein calculating a noise variance estimate for each band comprises averaging the stored noise estimates for pilots within the band from a plurality of received OFDM symbols.4. A method according to ...

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Номер записи: 20
05-12-2013 дата публикации

PROCESS CONTROL LOOP CURRENT VERIFICATION

Номер: US20130325381A1
Автор: Belov Leonid I., Schmidt Pavel P., Varnak Valentin G.
Принадлежит: Rosemount Inc.

Some embodiments are directed to a process device comprising a process variable sensor configured to generate an output signal indicative of a sensed process variable; loop current output circuitry configured to control a loop current on a two wire process control loop to a value based on the output signal; loop current measurement circuitry coupled to the process control loop and configured to generate a measured loop current value based on the loop current; and loop current verification circuitry configured to approximate the loop current value based on the output signal and properties of a low pass filter, and generate a diagnostic signal based on a comparison of the approximated loop current value and the measured loop current value. 1. A process device comprising:a process variable sensor configured to generate an output signal indicative of a sensed process variable;loop current output circuitry configured to control a loop current on a two wire process control loop to a value based on the output signal;loop current measurement circuitry coupled to the process control loop and configured to generate a measured loop current value based on the loop current; andloop current verification circuitry configured to approximate the loop current value based on the output signal and properties of a low pass filter, and generate a diagnostic signal based on a comparison of the approximated loop current value and the measured loop current value.2. The process device of claim 1 , including:a digital-to-analog conversion circuitry configured to convert a digital measured value representative of the output signal to an analog measured value, the conversion circuitry including a first low pass filter;wherein the loop current output circuitry is configured to control the loop current as a function of the analog measured value; andwherein the loop current verification circuitry is configured to approximate the loop current value based on properties of the first low pass filter.3 ...

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Номер записи: 21
12-12-2013 дата публикации

METHODS AND APPARATUS FOR DETECTING AZIMUTHAL NON-UNIFORMITY IN A PLASMA PROCESSING SYSTEM

Номер: US20130327481A1
Автор: Dhindsa Rajinder, Marakhtanov Alexei
Принадлежит:

Apparatus and methods for assessing RF return current azimuthal uniformity are disclosed. A plurality of non-linear substantially-enclosed RF current sensors are disposed azimuthally around a central axis of a plasma processing chamber. When a plasma is ignited in the plasma processing chamber, the RF return currents are sensed in the plurality of non-linear substantially-enclosed RF current sensors and analyzed to ascertain whether RF return current azimuthal uniformity is acceptable. 1. A plasma processing system having a plasma processing chamber , including a lower electrode assembly , comprising:a plurality of RF straps to permit RF currents to traverse said plurality of RF straps;a plurality of sensors, each of said plurality of sensors being coupled with one of said plurality of straps, wherein each sensor represents a non-linear substantially enclosed RF sensor.2. The plasma processing system of wherein said non-linear substantially enclosed RF sensor is formed of beryllium copper.3. The plasma processing system of wherein said non-linear substantially enclosed RF sensor is a part having a greater sidewall thickness than a thickness of a RF strap to which said non-linear substantially enclosed RF sensor is coupled.4. The plasma processing system of wherein said non-linear substantially enclosed RF sensor is coupled to a co-axial cable claim 1 , a sheath of said co-axial cable is coupled to a first portion of said non-linear substantially enclosed RF sensor and a core of said co-axial cable is coupled to a second portion of said non-linear substantially enclosed RF sensor to acquire voltage measurements between said first portion and said second portion.5. The plasma processing system of wherein said non-linear substantially enclosed RF sensor further includes insulating side enclosures to enclose side planes of said non-linear substantially enclosed RF sensor.6. The plasma processing system of wherein sensors of said plurality of sensors are arranged ...

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Номер записи: 22
02-01-2014 дата публикации

MAXIMUM VOLTAGE SELECTION CIRCUIT AND METHOD AND SUB-SELECTION CIRCUIT

Номер: US20140002139A1
Автор: HUANG Lei
Принадлежит: Fairchild Semiconductor Corporation

A maximum voltage selection circuit and method and a sub-selection circuit are provided. The maximum voltage selection circuit includes a peripheral signal circuit and a selection circuit with N channels of input voltages. The peripheral signal circuit provides an operating mode signal and a reference voltage to the selection circuit including N sub-selection circuits coupled to the N channels of input voltages respectively. A sub-selection circuit determines its operating mode according to the operating mode signal. In the operating mode, when an input voltage of a sub-selection circuit is larger than the reference voltage, the sub-selection circuit sets itself to the output enable state and sets other sub-selection circuits to the output disable state, and outputs its input voltage as a maximum voltage through a PMOS. 1. A sub-selection circuit , comprising an enable mode circuit and a disable mode circuit ,wherein the enable mode circuit includes a comparator, and is configured to operate when an operating mode signal is an enable signal, and to set itself to an output enable state, set other sub-selection circuits to an output disable state, and output its input voltage as a maximum voltage through a P-type metal oxide semiconductor field effect transistor (PMOS transistor) when its input voltage is larger than a reference voltage, andwherein the disable mode circuit includes a power latch, and is configured to operate when the operating mode signal is a disable signal, and to set itself to the output enable state, set other sub-selection circuits to the output disable state, and output its input voltage as the maximum voltage through the PMOS transistor when its input voltage is larger than the reference voltage.2. The sub-selection circuit according to claim 1 , wherein when there is a bias current in the sub-selection circuit claim 1 , the operating mode signal having a high level is used as the enable signal claim 1 , and when there is no bias current in the ...

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Номер записи: 23
16-01-2014 дата публикации

POWER CONSUMPTION MANAGEMENT SYSTEM

Номер: US20140015514A1
Автор: Shibuya Tenda
Принадлежит: NEC Corporation

A power consumption management system includes: a main part that is connected to a power line; a breaker that is electrically connected to the main part, and limits a current supplied to a load to a predetermined set value; a sensor unit including a current sensor and a signal processing part. The current sensor measures a current supplied from the main part to the breaker, and outputs a current detection signal based on the measured current. The signal processing part receives the current detection signal over a predetermined time, determines a range of a signal level from the received current detection signal, and adjusts an input range of the current detection signal in accordance with the determination result. 1. A power consumption management system comprising:a main part that is connected to a power line;a breaker that is electrically connected to the main part, and limits a current supplied to a load to a predetermined set value; anda sensor unit including a current sensor and a signal processing part,wherein the current sensor measures a current supplied from the main part to the breaker, and outputs a current detection signal based on the measured current, andthe signal processing part receives the current detection signal over a predetermined time, determines a range of a signal level from the received current detection signal, and adjusts an input range of the current detection signal in accordance with the determination result.2. The power consumption management system according to claim 1 , whereinthe current sensor includes a core that produces an induced current by a current that is supplied from the main part to the breaker, and a secondary coil that detects the induced current, andthe signal processing part includes a resistance circuit including a plurality of resistors having different resistance values, the resistors being connected in parallel, the resistors being connected in series with the secondary coil, the signal processing part adjusting ...

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Номер записи: 24
30-01-2014 дата публикации

Wireless Voltage Reference Broadcast In A Distributed Energy Metering System

Номер: US20140028282A1
Автор: Gallant Denis A., Joannou Emil T., Perry David Gareth
Принадлежит: TRIACTA POWER TECHNOLOGIES, INC.

A system and method of wireless voltage reference broadcast in a distributed energy metering system is provided. A voltage reference is determined at a distribution hub for wirelessly and transmitted in voltage reference data frames providing voltage samples and a clock synchronization from an alternating current (AC) line under measurement. Wireless metering units, each coupled to an AC load circuit, receive the voltage reference data frames wherein the current sampling clock of the wireless metering units are synchronized to a voltage sampling clock of the distribution hub for determining current samples from the respective AC load circuit to calculate energy data parameters. 153-. (canceled)54. A method of wireless distributed energy metering , the method comprising:determining a voltage reference sampling clock at a distribution hub;generating one or more digitized voltage samples from an alternating current (AC) line under measurement coupled to the AC line by a voltage sensing device;encoding a voltage reference data frame comprising the one or more digitized voltage samples; andbroadcasting the voltage reference data frame over radio frequencies (RF) to one or more wireless metering units each coupled to an AC load circuit of the AC line where a current sample clock of each of the wireless energy metering units is synchronized to the voltage reference sampling clock of the distribution hub and the one or more voltage samples and one or more current samples are utilized in calculating energy parameters sampled by the wireless energy metering units from the respective AC load circuit.55. The method of wherein the voltage reference sampling clock is a high-rate free-running clock which is non-synchronized to an AC-line rate.56. The method of wherein the voltage reference sampling clock is a high-rate clock synchronized to a zero-crossing of the AC line.57. The method of wherein the broadcast voltage reference data frame further comprises a clock synchronization ...

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Номер записи: 25
06-02-2014 дата публикации

TRANSIENT RECOVERY VOLTAGE MEASURING DEVICE, TRANSIENT RECOVERY VOLTAGE MEASURING METHOD, AND TRANSIENT RECOVERY VOLTAGE MEASURING PROGRAM

Номер: US20140035559A1
Автор: Koshizuka Tadashi, Kudo Kietsu, Nakamoto Tetsuya
Принадлежит: KABUSHIKI KAISHA TOSHIBA

A common tangent line drawn between a rise portion present from the origin to a second reference voltage and a rise portion corresponding to the second reference voltage can be easily generated through a waveform conversion. A transient recovery voltage measuring device includes a memory storing a transient recovery voltage waveform of a multiple frequency, a waveform conversion unit converting the transient recovery voltage waveform, a wave height determination unit determining two points having the same maximum value on the converted waveform, an adjustment unit adjusting the proportional constant of the waveform conversion unit to determine those two points by the wave height determination unit, a contact point detection unit obtaining two points corresponding to the determined two points determined by the wave height determination unit, and a tangent line generation unit generating a first tangent line passing through the detected two points on the transient recovery voltage waveform. 1. A transient recovery voltage measuring device comprising:a waveform memory that stores a transient recovery voltage waveform of a multiple frequency;a waveform conversion unit that converts the transient recovery voltage waveform based on a proportional value obtained by multiplying a time from an origin by a proportional constant;a wave height determination unit that determines two points having a same maximum value on a converted waveform;an adjustment unit that adjusts the proportional constant of the waveform conversion unit until two points having the same maximum value are determined by the wave height determination unit;a contact point detection unit that detects two points on the transient recovery voltage waveform corresponding to two points determined by the wave height determination unit; anda first tangent line generation unit that generates a first tangent line passing through the two points detected by the contact point detection unit.2. The transient recovery ...

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Номер записи: 26
27-02-2014 дата публикации

PEAK DETECTOR AND AUTO GAIN CONTROLLER USING THE SAME

Номер: US20140055124A1
Автор: Choi Young Kil, Kim Chang Hyun, KIM Sung Tae, Na Jun Kyung, Pyo Seung Chul
Принадлежит: SAMSUNG ELECTRO-MECHANICS CO., LTD.

Disclosed herein is a peak detector including: a operation time point providing unit outputting a certain time point before the maximum value in an interval in which a driving displacement increases as an operation time point, when a raising edge of an operation interval signal is detected; and a holding circuit unit, when a reset signal is input, starting an operation at the operation time point provided from the operation time point providing unit after an operation standby state and sensing and outputting a driving displacement of a driving mass. 1. A peak detector comprising:a operation time point providing unit outputting a certain time point before the maximum value in an interval in which a driving displacement increases as an operation time point, when a raising edge of an operation interval signal is detected; anda holding circuit unit, when a reset signal is input, starting an operation at the operation time point provided from the operation time point providing unit after an operation standby state and sensing and outputting a driving displacement of a driving mass.2. The peak detector as set forth in claim 1 , wherein an operation interval signal (READ) provided to the operation time point providing unit is a step waveform having a raising edge at a falling edge of the reset signal and holding a high level during a certain time.3. The peak detector as set forth in claim 1 , wherein the operation time point providing unit claim 1 , when the operation interval signal (READ) is input claim 1 , starts the operation from a time point of detecting the raising edge claim 1 , compares between reference voltage and the driving displacement of the driving mass to recognize a certain time point before the difference therebetween becomes the maximum value in an interval at which the driving displacement increases claim 1 , thereby providing the recognized certain time point as the operation time point.4. The peak detector as set forth in claim 1 , wherein the ...

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Номер записи: 27
27-03-2014 дата публикации

Method and Apparatus for Analog Pulse Pile-Up Rejection

Номер: US20140084961A1
Автор: De Geronimo Gianluigi
Принадлежит: Brookhaven Science Associates, LLC

A method and apparatus for pulse pile-up rejection are disclosed. The apparatus comprises a delay value application constituent configured to receive a threshold-crossing time value, and provide an adjustable value according to a delay value and the threshold-crossing time value; and a comparison constituent configured to receive a peak-occurrence time value and the adjustable value, compare the peak-occurrence time value with the adjustable value, indicate pulse acceptance if the peak-occurrence time value is less than or equal to the adjustable value, and indicate pulse rejection if the peak-occurrence time value is greater than the adjustable value. 1. An apparatus for pulse pile-up rejection , comprising:a discriminator circuit, configured to output a pulse threshold-crossing time signal in response to a received signal of a single pulse if the signal of the single pulse exceeds a threshold;a time delay circuit configured to receive the pulse threshold-crossing time signal, and output an adjustable delayed time signal according to a delay value and the pulse threshold-crossing time signal; anda comparator circuit that receives a pulse peak-occurrence time signal indicative of the peak-occurrence time of the single pulse, receives the adjustable delayed time signal, compares the pulse peak-occurrence time signal with the adjustable delayed time signal, indicates pulse acceptance if the pulse peak-occurrence time signal occurs before the adjustable delayed time signal, and indicates pulse rejection if the pulse peak-occurrence time signal occurs after the adjustable delayed time signal.2. The apparatus of claim 1 , wherein the delay value is calculated from a time jitter of the pulse threshold-crossing time signal claim 1 , a time walk of the pulse threshold-crossing time signal claim 1 , a time jitter of the pulse peak-occurrence time signal claim 1 , a time walk of the pulse peak-occurrence time signal claim 1 , or a combination thereof.3. The apparatus of claim ...

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Номер записи: 28
07-01-2016 дата публикации

Contactless Device for Characterising An Electric Signal

Номер: US20160003871A1
Автор: Toledano Thibault, Tourin-Lebret Dorian
Принадлежит:

A contactless device for characterising the electrical signal passing through an electrical conductor, comprising an inductive electromagnetic coupling means able to surround the conductor, the inductive electromagnetic coupling means further comprising means for short-circuiting the output of the inductive electromagnetic coupling means, the output being connected to an electronic circuit for measuring the potential difference with respect to a floating earth configured to deliver a signal representing the voltage between the segment of the conductor passing through the device, and a fixed potential reference. 111-. (canceled)12. A contactless device for characterising the electrical signal passing through an electrical conductor , comprising an inductive electromagnetic coupling means able to surround said conductor , said inductive electromagnetic coupling means further comprising means for short-circuiting the output of said inductive electromagnetic coupling means , said output being connected to an electronic circuit for measuring the potential difference with respect to a floating earth configured to deliver a signal representing the voltage between the segment of said conductor passing through the device , and a fixed potential reference.13. The contactless device for characterising the electrical signal passing through an electrical conductor according to claim 12 , wherein said electrical circuit comprises means for conditioning the signal measured between the short-circuited output and the floating earth claim 12 , configured to amplify the signal and adapt the impedance according to the means for measuring the potential difference.14. The contactless device for characterising the electrical signal passing through an electrical conductor according to claim 12 , further comprising an energy-storage circuit supplied by the output of said inductive coupling means when it is not in a short-circuit state.15. The contactless device for characterising the ...

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Номер записи: 29
07-01-2016 дата публикации

MEASURING SYSTEM HAVING SEVERAL SENSORS AND HAVING A CENTRAL EVALUATING UNIT

Номер: US20160003874A1
Автор: MARIEN Jan
Принадлежит:

The invention relates to a measuring system for measuring electrical measurement variables (I I I U U U) in an electrical installation, in particular in a medium voltage installation or in a high voltage installation, including a plurality of sensors (--) which each measure at least one electrical measurement variable (I I I U U U) and output a measurement signal corresponding to the measurement variable (I I I U U U), and including a central evaluating unit () which receives the measurement signals from the sensors (--). 117-. (canceled)18. A measuring system for measuring electrical measurement variables in an electrical installation , comprising:a) a plurality of sensors each of which measures at least one electrical measurement variable and outputs a measurement signal corresponding to the at least one electrical measurement variable, andb) a central evaluating unit which receives measurement signals from the sensors.191. The measuring system as claimed in claim , whereina) at least one sensor of the plurality of sensors is at a potential close to high voltage,b) the central evaluating unit is at a potential close to earth, andc) the at least one sensor at the potential close to high voltage is galvanically separated from the central evaluating unit at the potential close to earth.20. The measuring system as claimed in claim 19 , wherein the central evaluating unit is connected via a light conductor to the at least one sensor at the potential close to high voltage claim 19 , in order to read out the measurement signal and to separate the central evaluating unit galvanically from the at least one sensor.21. The measuring system as claimed in claim 19 , whereina) a current supply unit is provided for supplying current to the at least one sensor at the potential close to high voltage, wherein the current supply unit is connected to the at least one sensor and is at a potential close to earth, andb) the current supply unit at the potential close to earth is ...

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Номер записи: 30
07-01-2016 дата публикации

ALTERNATING CURRENT DETECTOR

Номер: US20160003875A1
Автор: YUAN Gary
Принадлежит: K-LINE AUTOMATION CO., LTD.

An alternating current detector is provided. The alternating current detector comprises a housing, a solenoid, a rectification and filtration circuit, an amplification and driving circuit. The housing has a penetration cavity in the middle thereof, and a wire loading an alternating current thereon passes through the penetration cavity. The solenoid surrounds the penetration cavity and detects a magnetic field generated by the alternating current to generate a first voltage. The rectification and filtration circuit rectifies and filters the first voltage to generate a second voltage. The amplification and driving circuit amplifies the second voltage to generate an output current between a first output terminal and a second terminal. 1. An alternating current detector having a first output terminal and a second output terminal comprising:a solenoid detecting a magnetic field of a specified zone and generating a first voltage in a first node according to the magnetic field, wherein a wire loading an alternating current generates the magnetic field in the specified zone;a rectification and filtration circuit coupled to the first node and a second node, rectifying and filtering the first voltage to generating a second voltage; andan amplification and driving circuit coupled to the second node, amplifying the second voltage to generate an output current between the first output terminal and the second output terminal.2. The alternating current detector as claimed in claim 1 , further comprising an indicating lamp which is coupled to the first node and a ground potential and emits light according to the first voltage.3. The alternating current detector as claimed in claim 1 , wherein the rectification and filtration circuit comprises:a diode coupled to the first node and the second node and rectifying a current through the first node and the second node; anda capacitor coupled to the second node and a ground potential.4. The alternating current detector as claimed in claim ...

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Номер записи: 31
04-01-2018 дата публикации

NESTED AMMETER

Номер: US20180003741A1
Автор: Goeke Wayne C.
Принадлежит:

A nested ammeter for measuring the electrical current flowing through a device under test (DUT) can include an input configured to receive an input signal having a frequency within a frequency band and representing the electrical current flowing through the DUT. The nested ammeter can also include an output configured to generate an output voltage representing the electrical current flowing through the DUT. An active shunt can be used as the resistive feedback of the ammeter. A nested active shunt can be used as the resistive feedback element of the active shunt. 1. An ammeter for measuring current flowing through a device under test (DUT) , the nested ammeter comprising:an input configured to receive an input signal having a frequency within a frequency band and representing the current flowing through the DUT;an output configured to generate an output voltage representing the current flowing through the DUT;a first operational amplifier (op-amp) electrically coupled between the input and the output; anda first active shunt electrically coupled with the first op-amp and used as a resistive feedback element for the ammeter.2. The ammeter of claim 1 , wherein the first active shunt includes a second op-amp.3. The ammeter of claim 1 , further comprising a capacitor electrically coupled in parallel with the first active shunt.4. The ammeter of claim 2 , wherein the first active shunt includes a second active shunt electrically coupled with the second op-amp and used as a resistive feedback element for the first active shunt.5. The ammeter of claim 4 , wherein the second active shunt includes a third op-amp.6. The ammeter of claim 4 , further comprising a capacitor electrically coupled in parallel with the second active shunt.7. The ammeter of claim 5 , wherein the second active shunt includes a third active shunt electrically coupled with the third op-amp and used as a resistive feedback element for the second active shunt.8. The ammeter of claim 7 , wherein the third ...

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Номер записи: 32
07-01-2021 дата публикации

Voltage Measurement Through Reference Circuit Based Impedance Detection

Номер: US20210003618A1
Автор: Barrenscheen Jens
Принадлежит:

A circuit for measurement of a voltage comprises a passive sensing element configured to be coupled between a measurement point and a reference point. The passive sensing element has a voltage-dependent impedance. Further, the circuit comprises an impedance detector and a reference circuit. The impedance detector is configured to detect the impedance of the passive sensing element by providing a probe signal to the passive sensing element and evaluating a response to the probe signal from the passive sensing element and a reference response from the reference circuit. Further, the circuit comprises a converter circuit configured to convert a result of evaluating the response and the reference response to a voltage level information. 1. A circuit for measuring a voltage , the circuit comprising:a passive sensing element configured to be coupled between a measurement point and a reference point, the passive sensing element having a voltage-dependent impedance;a reference circuit configured to provide a reference response;an impedance detector configured to detect the voltage-dependent impedance of the passive sensing element by providing a probe signal to the passive sensing element and evaluating a response to the probe signal from the passive sensing element and the reference response provided by the reference circuit; anda converter circuit configured to convert a result of evaluating the response and the reference response to a voltage level information.2. The circuit according to claim 1 ,wherein the probe signal has a constant frequency.3. The circuit according to claim 1 ,wherein the probe signal is a pulse signal.4. The circuit according to claim 1 , wherein the impedance detector is configured to evaluate the response and the reference response by determining a difference between the response and the reference response.5. The circuit according to claim 4 , wherein the converter circuit is configured to determine the voltage level information by mapping the ...

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Номер записи: 33
08-01-2015 дата публикации

SIGNAL ENVELOPE PROCESSING

Номер: US20150008962A1
Автор: Blyth Malcolm, Mackay Graeme Gordon
Принадлежит: Wolfson Microelectronics plc

Methods and apparatus for detection and tracking of a signal envelope. The circuit comprises absolute value circuitry configured to receive data samples and output a first value corresponding to the magnitude of said data samples. An envelope tracker maintains an envelope output value and compares the first value to the current envelope output value and modifies the envelope output value based on said comparison to provide the envelope output value with predetermined attack and decay characteristics. The absolute value circuitry has a first input for receiving a first digital signal at a first sample rate and a second input for receiving an interpolated version of the first digital signal at a second sample rate which is higher than the first sample rate and outputs the first value based on the magnitudes of the samples received at the first input and the samples received at the second input. Using the first digital signal provides an early indication of any increases in signal envelope whereas the second digital signal can allow a more accurate estimation. 1. An envelope detection circuit comprising:absolute value circuitry configured to receive data samples and output a first value corresponding to the magnitude of said data samples; andan envelope tracker configured to maintain an envelope output value and to compare the first value to the current envelope output value and modify the envelope output value based on said comparison to provide the envelope output value with predetermined attack and decay characteristics;wherein the absolute value circuitry comprises a first input for receiving a first digital signal at a first sample rate and a second input for receiving an interpolated version of the first digital signal at a second sample rate which is higher than the first sample rate and is configured to output said first value based on the magnitudes of the samples received at the first input and the samples received at the second input.2. An envelope detection ...

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Номер записи: 34
04-01-2018 дата публикации

INFORMATION PROCESSING APPARATUS, METHOD FOR MANAGING, NON-TRANSITORY COMPUTER-READABLE RECORDING MEDIUM HAVING STORED THEREIN MANAGEMENT PROGRAM, AND METHOD FOR SPECIFYING INSTALLING POSITION OF ELECTRONIC DEVICE

Номер: US20180007808A1
Автор: MIZUTANI Yoshinobu
Принадлежит: FUJITSU LIMITED

An information processing apparatus includes an applier that applies an alternating voltage to a lead provided for a frame of a rack that stores one or more electronic devices along a direction of arrangement of the electronic devices, the lead being in contact with a fixing part when the electronic devices are installed; a measure that measures an alternating wave of the alternating voltage flowing through the lead; and a specifier that specifies an installing position of an electronic device by referring to reference waveform information with a waveform of the measure alternating wave, the reference waveform information associating an installing state of the electronic device in the rack with a waveform pattern of the alternating wave measured under the installing state. This configuration reduces steps needed for managing a token, an archive, a token password and enhances the security level of the terminal device. 1. An information processing apparatus comprising:an applier that applies an alternating voltage to a lead being provided for a frame of a rack that stores one or more electronic devices along a direction of arrangement of the one or more electronic devices, the lead being in contact with a fixing part when the one or more electronic devices are installed;a measure that measures an alternating wave of the alternating voltage flowing through the lead; anda specifier that specifies an installing position of an electronic device by referring to reference waveform information with a waveform of the alternating wave measured by the measure, the reference waveform information associating an installing state of installing the one or more electronic devices in the rack with a waveform pattern of the alternating wave measured under the installing state.2. The information processing apparatus according to claim 1 , wherein:the applier applies the alternating voltage to the lead from a first end of the lead; andthe measure measures a superimposed wave of an ...

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Номер записи: 35
14-01-2016 дата публикации

SYSTEMS AND METHODS FOR DETECTING AND IDENTIFYING ARCING BASED ON NUMERICAL ANALYSIS

Номер: US20160011249A1
Автор: III William Vernon, MILLER, Miller Gary Michael
Принадлежит:

Method and system allowing more accurate detection and identification of unwanted arcing include novel processing of signal voltage representing recovered power-line current. In one implementation, arc-faults are detected based on numerical analysis where individual cycles of line voltage and current are observed and data collected during each cycle is processed to estimate likelihood of presence of arc-event within each individual cycle based on pre-defined number of arc-events occurring within pre-defined number of contiguous cycles. In another implementation, fast transient current spikes detection can be done by: computing difference values between consecutive line-current samples collected over a cycle, average of differences, and peak-to-peak value of line-current; comparing each difference value to average of difference; comparing each difference value to peak-to-peak value; and, based on calculation of composite of two comparisons, using thresholds to determine if arcing is present within processed cycle. 1. A method of detecting and identifying arcing comprising:obtaining first data indicative of line voltage and line current for a first cycle of a voltage waveform;obtaining second data indicative of line voltage and current for a second cycle of the voltage waveform subsequent to the first cycle;correlating the first data with data representative of a known arc reference cycle;correlating the second data with the data representative of the known arc reference cycle;correlating the first data with the second data; anddetermining presence of monotonic behavior in the root-mean-square (RMS) amplitude of the line current from data indicative of line voltage and line current for a plurality of cycle of a voltage waveform, the data comprising at least the first and second data.2. The method of detecting and identifying arcing of claim 1 , wherein the first and second cycles of the line voltage and current are observed with reference to zero-crossings on the ...

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Номер записи: 36
11-01-2018 дата публикации

METHODS AND APPARATUSES FOR CHARACTERISTIC MANAGEMENT WITH SIDE-CHANNEL SIGNATURE ANALYSIS

Номер: US20180011130A1
Автор: Aguayo Gonzalez Carlos R., Chen Steven C., Reed Jeffrey H.
Принадлежит: Power Fingerprinting Inc.

Some embodiments described herein include an apparatus having a processor communicatively coupled to a memory. The processor is configured to monitor, at a characteristic controller, a first characteristic of an electronic device. The processor is then configured to receive side-channel signature analysis of the electronic device from a signature analyzer. The processor is configured to determine if the first characteristic of the electronic device has changed or will change in a predefined period of time based on the side-channel signature analysis. The processor is then configured to adjust a second characteristic of the electronic device and/or filtering characteristics such that the side-channel signature analysis reflects predefined side-channel behavior. 1. An apparatus; comprising:a memory; anda processor communicatively coupled to the memory,the processor configured to monitor a first characteristic of an electronic device,the processor configured to perform side-channel signature analysis of the electronic device,the processor configured to determine if the first characteristic of the electronic device has changed or will change in a predefined period of time based on the side-channel signature analysis,the processor configured to adjust a second characteristic of the electronic device in response to determining that the first characteristic has changed or will change in the predefined period of time such that the side-channel signature analysis corresponds to predefined side-channel behavior, the second characteristic being different from the first characteristic.2. The apparatus of claim 1 , wherein the processor is configured to monitor the first characteristic of the electronic device that is physically collocated with the apparatus.3. The apparatus of claim 1 , wherein the processor is configured to monitor the first characteristic of the electronic device that is physically remote from the apparatus.4. The apparatus of claim 1 , wherein:the processor ...

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Номер записи: 37
15-01-2015 дата публикации

Method and Device for Measuring Current at a Converter

Номер: US20150015235A1
Автор: Brendel Christian
Принадлежит:

In a method and device for measuring current at a converter, the prevailing phase current is determined at the output of the converter by current-measuring devices, in order to supply it to a closed-loop control device assigned to the converter. The prevailing phase current to be ascertained at an output of the converter is measured independently at two current-measuring devices, and the measuring results of both current-measuring devices are utilized to determine the prevailing phase current. 1. A method for measuring current at a converter in order to supply the measuring current to a closed-loop control device assigned to the converter , comprising:independently measuring a prevailing phase current at an output of the converter by at least two current-measurement devices, utilizing measuring results of both current-measurement devices to determine the prevailing phase current.2. The method according to claim 1 , wherein the current-measurement devices claim 1 , at which in each case a common phase current is measured claim 1 , are connected in parallel to each other.3. The method according to claim 1 , further comprising averaging the measured values of the current-measurement devices to determine a resultant value of the phase current.4. The method according to claim 1 , wherein the measuring includes processing a measurement voltage claim 1 , which drops at a resistor claim 1 , assigned to the current-measurement device claim 1 , as a function of the phase current.5. The method according to claim 1 , further comprising repeatedly calibrating the current-measurement devices during operation of the converter.6. The method according to claim 5 , wherein to correct measuring errors claim 5 , the current-measurement devices are calibrated individually claim 5 , while at least one further current-measurement device used for measuring the phase current is in measuring operation.7. The method according to claim 5 , wherein the calibrating includes correcting an offset ...

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Номер записи: 38
21-01-2016 дата публикации

Current transformer and method for converting a conductor current flowing in an electrical conductor to an output signal

Номер: US20160018444A1
Автор: Christian Heggemann, Hans Schlingmann, Michael GERKENS
Принадлежит: Weidmueller Interface GmbH and Co KG

A current transformer arrangement, and method, include a current sensor for producing a sensor output voltage that is proportional to the input current flowing in a conductor; a first processing branch including a voltage calculating device for calculating the effective voltage value of the sensor output voltage; a second processing branch including a polarity detecting device having an input terminal connected with the current sensor output terminal to produce a polarity signal having one polarity when the conductor input current is either an alternating current, a hybrid current, or a direct current flowing in one direction, and the opposite polarity when the conductor input current is a direct current flowing in the opposite direction; and a multiplier device for modifying the effective voltage value to produce a signed effective voltage having a polarity corresponding with the polarity of the polarity signal. A modifying circuit modifies the signed effective voltage.

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Номер записи: 39
18-01-2018 дата публикации

Method for Phonon Assisted Creation and Annihilation of Subsurface Electric Dipoles

Номер: US20180017527A1
Автор: Generazio Edward R.
Принадлежит:

Methods and systems are disclosed for dynamically creating and annihilating subsurface electric dipoles having variable strength and variable alignment. The ability of various embodiments to create, annihilate, and control subsurface dipoles may be a useful technology for wide variety of applications including the nondestructive testing of materials and structures, for generating and receiving directed and omni-directional variable amplitude and frequency transmission waves without the need for conductive antennas, for phonon to electromagnetic power conversion, for materials and manufacturing process control, atomic and nanoparticle alignment, and for control and utilization as medical therapies. 1. A system for characterizing objects , comprising:a phonon generation source; andan imaging array,wherein the phonon generation source is configured to propagate phonons into an object comprising two materials while the imaging array generates one or more electric potential images of the object from which electric field components are determined and imaged.2. The system of claim 1 , wherein the phonon generation source is a contact device.3. The system of claim 2 , wherein the phonon generation source is an ultrasonic transducer or mechanical vibration system.4. The system of claim 1 , wherein the phonon generation source is a non-contact device.5. The system of claim 4 , wherein the phonon generation source is an air coupled ultrasonic transducer or sound speaker.6. The system of claim 1 , wherein the imaging array is a single element electric potential measurement array.7. The system of claim 1 , wherein the imaging array is a multi-element electric potential measurement array.8. The system of claim 1 , wherein the propagated phonons have a distribution of frequencies.9. The system of claim 8 , wherein the distribution of frequencies is an infrasonic distribution of frequencies claim 8 , acoustic distribution of frequencies claim 8 , subsonic distribution of ...

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Номер записи: 40
18-01-2018 дата публикации

IDENTIFICATION AND CHARACTERIZATION OF REMOTE OBJECTS BY ELECTRIC CHARGE TUNNELING, INJECTION, AND INDUCTION, AND AN ERASABLE ORGANIC MOLECULAR MEMORY

Номер: US20180017528A1
Автор: Generazio Edward R.
Принадлежит:

Various embodiments provide methods to identify and characterize remote objects by use of electric charge distributions generated by charge tunneling, charge injection, and charge induction. Various embodiments may use selective electrostatic charging to change the electrostatic potential throughout volumes for identification and characterization. In various embodiments, objects of interest may be selectively charged by tunneling, injection, and induction of electrical charges or free carriers. Tunneled, injected, and induced charges may migrate to sites or locations internal to volumes to yield electrostatic potential differences and electrostatic fields. In various embodiments, variations in the electrostatic potential created by the presence of the tunneled, injected, and induced charges may be quantitatively measured to identify and characterize remote objects. 1. A method for characterizing an object of interest , comprising:generating unbound charges on a container, located between two electrodes, and on a object of interest, held within the container, by generating an electrostatic field between the two electrodes held at different electrical potentials;removing the electrostatic field from the container holding the object of interest; andmeasuring an electric potential of the container holding the object of interest in response to removing the electrostatic field to generate electric potential measurement data of the container and the object of interest.2. The method of claim 1 , wherein measuring the electric potential of the container holding the object of interest in response to removing the electrostatic field to generate the electric potential measurement data of the container and the object of interest comprises electric field imaging the container holding the object of interest in response to removing the electrostatic field to generate one or more electric field images of the container and the object of interest.3. The method of claim 2 , wherein ...

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Номер записи: 41
18-01-2018 дата публикации

LOW-ENERGY ACTUATOR (LEA) DIODE DETECTION

Номер: US20180017601A1
Автор: EASWARAN Sri Navaneethakrishnan, VENUGOPAL Sunil Kashyap
Принадлежит:

A circuit comprises a CLVS, a LEA coupled to the CLVS, and a peak detector coupled to the CLVS and the LEA, wherein the peak detector is a switch-based peak detector. A method comprises closing a first switch for a period of time to provide a current to an actuator, opening the first switch after the period, measuring, after the opening, a voltage associated with the actuator, and determining, based on the measuring and using an ADC, whether a diode is present in the actuator and coupled with a correct polarity, is missing, or is present in the actuator and coupled with an incorrect polarity. 1. A circuit comprising:a current-limited voltage source (CLVS);a low-energy actuator (LEA) coupled to the CLVS; anda peak detector coupled to the CLVS and the LEA, wherein the peak detector is a switch-based peak detector.2. The circuit of claim 1 , wherein the CLVS is a low-side CLVS.3. The circuit of claim 2 , wherein the CLVS comprises only one operational transconductance amplifier (OTA).4. The circuit of claim 3 , wherein the CLVS comprises a compensation capacitor coupled to the OTA claim 3 , wherein the compensation capacitor is a low-voltage compensation capacitor.5. The circuit of claim 1 , wherein the peak detector comprises a plurality of switches.6. The circuit of claim 5 , wherein the peak detector comprises two switches.7. The circuit of claim 1 , wherein the LEA comprises an inductor claim 1 , a resistor claim 1 , and a diode.8. The circuit of claim 7 , wherein the inductor and the resistor are coupled in series with each other claim 7 , and wherein the diode is coupled in parallel with the inductor and the resistor.9. The circuit of claim 8 , wherein the diode is a freewheeling Schottky diode.10. A diode detection circuit comprising:an actuator comprising an inductor and a resistor; anda peak detector coupled to the actuator, comprising a plurality of switches and a capacitor, and configured to couple to an analog-to-digital converter (ADC) to determine whether ...

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Номер записи: 42
18-01-2018 дата публикации

APPARATUS, SYSTEMS AND METHODS FOR GENERATING VOLTAGE EXCITATION WAVEFORMS

Номер: US20180017981A1
Автор: Griffith Keith R., McFarland Scott A.
Принадлежит:

A method described herein includes describing a load current with a discrete time function. The method includes using a first frequency and a second frequency to provide an approximation of the described load current, wherein a transform applied to the discrete time function identifies the first frequency and the second frequency. The method includes estimating a loop inductance and a loop resistance of a wire loop by exciting a transmit circuit with a voltage reference step waveform, wherein the transmit circuit includes the wire loop. The method includes scaling the approximated load current to a level sufficient to generate a minimum receive voltage signal in a receiver at a first distance between the wire loop and the receiver. The method includes generating a first voltage signal using the scaled load current, estimated loop inductance, and estimated loop resistance. The method includes exciting the transmit circuit with the first voltage signal. 1. A method comprising ,describing a load current with a discrete time function;using a first frequency and a second frequency to provide an approximation of the described load current, wherein a transform applied to the discrete time function identifies the first frequency and the second frequency;estimating a loop inductance and a loop resistance of a wire loop by exciting a transmit circuit with a voltage reference step waveform, wherein the transmit circuit includes the wire loop;scaling the approximated load current to a level sufficient to generate a minimum receive voltage signal in a receiver at a first distance between the wire loop and the receiver;generating a first voltage signal using the scaled load current, the estimated loop inductance, and the estimated loop resistance;exciting the transmit circuit with the first voltage signal.2. The method of claim 1 , wherein the estimating the loop inductance and the loop resistance includes monitoring the transmit circuit's current in response to the voltage ...

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Номер записи: 43
21-01-2016 дата публикации

INVERTER DEVICE

Номер: US20160020704A1
Автор: Fujita Masakazu
Принадлежит:

An inverter device includes: a simulation output voltage generation unit that generates a simulation output voltage that corresponds to an instantaneous value of an alternating current output voltage and that has a waveform whose peak value is smaller than a peak value of the output voltage; a circuit that generates a peak value detection voltage by rectifying and smoothing the simulation output voltage; and a monitor circuit that compares the peak value detection voltage, or a voltage obtained by dividing the peak value detection voltage, with a reference voltage and transmits a feedback signal according to the result of the comparison to the control circuit. The control circuit changes a duty ratio of a switching signal for performing on/off control on the switching element in accordance with the feedback signal and controls the peak value detection voltage to keep a given value. 1. An inverter device that switches an input voltage by using a switching element on which on/off control is performed by a control circuit , flows an excitation current into an excitation winding of a resonance transformer during a period in which the switching element is on , and outputs an alternating current output voltage from an output winding of the resonance transformer during a period in which the switching element is off , the inverter device comprising:a simulation output voltage generation unit that generates a simulation output voltage that corresponds to an instantaneous value of the output voltage and that has a waveform whose peak value is smaller than a peak value of the output voltage;a circuit that generates a peak value detection voltage by rectifying and smoothing the simulation output voltage; anda monitor circuit that compares the peak value detection voltage, or a voltage obtained by dividing the peak value detection voltage, with a reference voltage and transmits a feedback signal according to the result of the comparison to the control circuit,wherein the control ...

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Номер записи: 44
17-04-2014 дата публикации

CURRENT SENSOR

Номер: US20140103908A1
Автор: TAMURA Manabu
Принадлежит: ALPS GREEN DEVICES CO., LTD.

A current sensor of the present invention includes a mounting unit including a disposition region in which a current path is disposed, a pair of magnetic detection elements disposed in the mounting unit so as to sandwich therebetween the disposition region, and an arithmetic circuit performing an arithmetic operation on the current value of the current path on the basis of the detection values of the pair of magnetic detection elements. The pair of magnetic detection elements is disposed on sides opposite to each other with respect to a virtual line passing through the gravity center of the current path in cross-sectional view of the current path, and individually has sensitivity axes parallel to a direction perpendicular to the direction of a current conducted through the current path and the direction of the virtual line. 1. A current sensor comprising:a mounting unit configured to include a disposition region in which a current path is disposed;a pair of magnetic detection elements configured to be disposed on the mounting unit so as to sandwich therebetween the disposition region; andan arithmetic circuit configured to be provided on the mounting unit and perform an arithmetic operation on a current value of the current path on the basis of detection values of the pair of magnetic detection elements, whereinthe pair of magnetic detection elements is disposed on sides opposite to each other with respect to a virtual line passing through a gravity center of the current path in cross-sectional view of the current path, and individually has sensitivity axes parallel to a direction perpendicular to a direction of a current conducted through the current path and a direction of the virtual line.2. The current sensor according to claim 1 , whereinthe pair of magnetic detection elements is disposed so that entire portions of the pair of magnetic detection elements are located on sides opposite to each other with respect to the virtual line.3. The current sensor according ...

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Номер записи: 45
17-04-2014 дата публикации

CURRENT SENSOR

Номер: US20140103918A1
Автор: NOMURA Masatoshi
Принадлежит: ALPS GREEN DEVICES CO., LTD.

A current sensor includes a first current path, a second current path disposed parallel to the first current path, and a pair of first magnetic sensors. The first current path has a pair of main surfaces and includes a plate-shaped first region. The second current path has a pair of main surfaces and includes a plate-shaped second region. The first magnetic sensors are arranged on the respective main surfaces in the first region such that sensing axes of the first magnetic sensors are parallel to the respective main surfaces in the first region. The first magnetic sensors are configured to sense a magnetic field generated by a target current flowing through the first region. The second region is placed such that the main surfaces in the second region are perpendicular to the sensing axes of the first magnetic sensors. 1. A current sensor comprising:a first current path having a pair of main surfaces and including a first region and a third region each having a plate-like shape;a second current path disposed parallel to the first current path, the second current path having a pair of main surfaces and including a second region and a fourth region each having a plate-like shape;a pair of first magnetic sensors arranged on the respective main surfaces in the first region such that sensing axes of the first magnetic sensors are parallel to the respective main surfaces in the first region and are parallel to each other, the first magnetic sensors being configured to sense a magnetic field generated by a target current flowing through the first region; anda pair of second magnetic sensors arranged on the respective main surfaces in the fourth region such that sensing axes of the second magnetic sensors are parallel to the respective main surfaces in the fourth region and are parallel to each other, the second magnetic sensors being configured to sense a magnetic field generated by a target current flowing through the fourth region,wherein the second region is placed such ...

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Номер записи: 46
22-01-2015 дата публикации

MONITORING DEVICE AND METHOD FOR MONITORING A LINE SECTION USING A MONITORING DEVICE

Номер: US20150022182A1
Автор: ALBRECHT Stefan Antonius
Принадлежит:

A monitoring device is provided that includes a first line section with a first connection point and a second connection point spaced apart from the first connection point in the direction of the line, and with a control unit and with a first current sensing unit, having a current source. A first switch is inserted into the first connecting line and connects the first current source to the first connection point or disconnects it therefrom. In a first state the first switch is closed and the first current is impressed on the first line section and a first voltage determined by the amplitude of the actual current, and in a second state the first switch is open and a second voltage is determined, and the control unit is configured to ascertain the amplitude of the first actual current from the two voltages. 1. A monitoring device comprising:a first line section with a first connection point and a second connection point spaced apart from the first connection point in a direction of the line;a control unit;a first current sensing unit comprising:a first current source connectable to the first connection point via a first connecting line and connectable to the second connection point via a second connecting line, the first current source being configured to output a first current;a first switch having a control input, the first switch being inserted into the second connecting line and being configured to connect or disconnect the first current source to the second connection point; anda first differential amplifier having a first input, a second input, and an output, the first input being connectable to the first connection point via a third connecting line, the second input being connectable to the second connection point by a fourth connecting line;wherein the control unit is inserted between the output of the first differential amplifier and the control input of the first switch,wherein an actual current is passed through the first line section,wherein, in a first ...

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Номер записи: 47
22-01-2015 дата публикации

CURRENT SENSOR

Номер: US20150022199A1
Автор: Kato Satoshi, MITO Shinya, Takenaka Kazuma
Принадлежит:

A current sensor includes: four magnetic sensor elements arranged within a plane orthogonal to a measured current, having a symmetrical magnetic characteristics curve, and adapted to convert a magnitude of a magnetic field into an electrical signal and output the electrical signal; a bridge circuit including the four magnetic sensor elements; and a bias magnetic field application member adapted to applying a bias magnetic field to the magnetic sensor elements. 1. A current sensor including:four magnetic sensor elements arranged within a plane orthogonal to a measured current, having a symmetrical magnetic characteristics curve, and adapted to convert a magnitude of a magnetic field into an electrical signal and output the electrical signal;a bridge circuit including the four magnetic sensor elements; anda bias magnetic field application member adapted to applying a bias magnetic field to the magnetic sensor elements.2. The current sensor according to claim 1 , wherein the magnetic sensor elements are magneto-resistance elements electric resistances of which change in response to application of a magnetic field.3. The current sensor according to claim 1 , wherein the magnetic sensor elements are magneto-impedance elements electric impedances of which change in response to application of a magnetic field.4. The current sensor according to claim 1 , wherein the bias magnetic field application member includes a permanent magnet.5. The current sensor according to further having a sensor substrate made of a non-magnetic material on which the magnetic sensor elements are mounted.6. The current sensor according to claim 5 , wherein the magnetic sensor elements are mounted on one surface of the sensor substrate and the bias magnetic field application member is arranged on the other surface of the sensor substrate.7. The current sensor according to further having an attachment member made of a magnetic material for attaching the bias magnetic field application member to the ...

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Номер записи: 48
22-01-2015 дата публикации

ELECTRONIC DEVICE AND CURRENT MONITORING METHOD

Номер: US20150022225A1
Автор: ADACHI Hiroshi, ISHII Yuji, Kawazoe Kenichi, Onimaru Hiroshi, Rikimaru Kenji
Принадлежит:

An electronic device includes: a detection circuit to detect a voltage difference between both ends of a wiring portion which is at least a portion of a power supply wiring that connects a power supply circuit and a receiver circuit; a current supply circuit to supply a pilot current having a first current value which is smaller than a second current value of a main current to the power supply wiring; and a control circuit to control supply of the pilot current and stop of the supply of the pilot current, to calculate a wiring resistance value of the wiring portion based on a first value of the voltage difference when the supply is stopped, a second value of the voltage difference when the pilot current is supplied, and the first current value and to calculate the second current value based on the first value and the wiring resistance value. 1. An electronic device comprising:a power supply circuit configured to supply a main current;a receiver circuit configured to be driven by the main current supplied from the power supply circuit;a detection circuit configured to detect a voltage difference occurring between both ends of a wiring portion which is at least a portion of a power supply wiring that connects the power supply circuit and the receiver circuit, by a current flowing in the power supply wiring;a current supply circuit configured to supply a pilot current having a first current value which is smaller than a second current value of the main current to the power supply wiring; anda control circuit configured to control supply of the pilot current and stop of the supply of the pilot current for the current supply circuit, to calculate a wiring resistance value of the wiring portion based on a first value of the voltage difference detected by the detection circuit when the supply of the pilot current is stopped, a second value of the voltage difference detected by the detection circuit when the pilot current is supplied, and the first current value and to ...

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Номер записи: 49
21-01-2021 дата публикации

METHODS AND APPARATUS FOR CURRENT SENSING AND CURRENT LIMITING

Номер: US20210021122A1
Автор: Hastings Roy Alan
Принадлежит:

Methods, apparatus, systems and articles of manufacture are disclosed for current sensing and current limiting. An example apparatus includes a first main transistor including a first main transistor gate terminal coupled between an output terminal and an intermediate node; a second main transistor including a second main transistor gate terminal coupled between the intermediate node and a ground terminal; a first amplifier including a first amplifier output coupled to the first main transistor gate terminal; a second amplifier including a second amplifier output coupled to the second main transistor gate terminal; and a third amplifier including a third amplifier inverting input coupled to the intermediate node, a third amplifier non-inverting input coupled to a sense transistor, and a third amplifier output coupled to a third gate terminal of a third transistor. 1. An apparatus comprising ,a first main transistor including a first main transistor gate terminal coupled between an output terminal and an intermediate node;a second main transistor including a second main transistor gate terminal coupled between the intermediate node and a ground terminal;a first amplifier including a first amplifier output coupled to the first main transistor gate terminal;a second amplifier including a second amplifier output coupled to the second main transistor gate terminal; anda third amplifier including a third amplifier inverting input coupled to the intermediate node, a third amplifier non-inverting input coupled to a sense transistor, and a third amplifier output coupled to a third gate terminal of a third transistor.2. The apparatus of claim 1 , wherein the first main transistor claim 1 , the second main transistor; and the sense transistor are N-Channel metal oxide semiconductor field effect transistors and the third transistor is a P-Channel metal oxide semiconductor field effect transistor.3. The apparatus of claim 1 , further including a fourth transistor coupled to the ...

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Номер записи: 50
28-01-2016 дата публикации

METHOD AND CIRCUIT FOR CONFIRMING CORRECTNESS OF SIGNAL AND CHARGING SYSTEM USING SAME

Номер: US20160025779A1
Автор: Chu Yi-Shan, Yang Shih-Jen, Yin Chih-Ping
Принадлежит: RICHTEK TECHNOLOGY CORPORATION

A method for confirming correctness of a signal includes: providing a current to flow through a time-dependent impedance circuit, wherein the time-dependent impedance circuit provides at least two resistances at two different time points, the current flowing through the time-dependent impedance circuit to generate a first voltage at a first time point, and the current flowing through the time-dependent impedance circuit to generate a second voltage at a second time point, the first voltage and the second voltage being different from each other. When a predetermined relationship exists between the first voltage and the second voltage, it is confirmed that a signal provided from a node coupled to the time-dependent impedance circuit is correct. 1. A method for confirming correctness of a signal , comprising the steps of:providing a current to flow through a time-dependent impedance circuit, wherein the time-dependent impedance circuit provides at least two resistances at two different time points, the current flowing through the time-dependent impedance circuit to generate a first voltage at a first time point, and the current flowing through the time-dependent impedance circuit to generate a second voltage at a second time point different from the first time point, the first voltage and the second voltage being different from each other;determining whether a predetermined relationship between the first voltage and the second voltage exists; andif the predetermined relationship exists, confirming that a signal provided from a node coupled to the time-dependent impedance circuit is correct.2. The method for confirming correctness of the signal of claim 1 , wherein the time-dependent impedance circuit includes:a first resistor and a second resistor connected in series with each other; anda capacitor connected in parallel with the second resistor;wherein, at the first time point, the capacitor is not charged and the first voltage is determined by a product of the current ...

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Номер записи: 51
28-01-2016 дата публикации

ALTERNATING CURRENT DETECTOR WITH AUTOMATICALLY JUDGING OF THE AMOUNT OF ELEMENT UNDER TESTING AND MONITORING

Номер: US20160025780A1
Автор: YUAN Gary
Принадлежит:

An alternating current detector with automatic judging of the amount of element under testing and monitoring, comprising a detecting input unit, a first output level unit, a second delay unit, a second output level unit and a cascade next element unit. The detecting input unit comprises a first delay unit and a first inverter. The first delay unit receives and delays an input signal. The input terminal of the first inverter is connected to the first delay unit and inverts the input signal. The first output level unit comprises a first NAND gate, a first diode and first resistor. The input terminal of the first NAND gate is connected to the alternating current signal of an element, another input terminal of the first NAND gate is connected to the output terminal of the first inverter. 1. An alternating current detector with automatic judging of amount of element under testing and monitoring comprising:a detecting input unit comprising:a first delay unit having an output terminal for receiving and delaying an input signal; anda first inverter having an input terminal and an output terminal, the input terminal being connected to the first delay unit, which inverts the input signal;a first output level unit comprising:a first NAND gate having a first input terminal, a second input terminal and an output terminal, the first input terminal being connected to an alternating current source of an element, the second input terminal being connected to an output of the first inverter;a first diode having a positive terminal and a negative terminal, the negative terminal being connected to the output terminal of the first NAND gate;a first resistor having a first terminal and a second terminal, the first terminal being connected to the positive terminal of the first diode;a second delay unit having an output terminal and being connected to the output terminal of the first inverter, which delays the input signal being inverted;a second output level unit comprising:a second NAND ...

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Номер записи: 52
26-01-2017 дата публикации

Methods and Apparatus for Peak-Voltage Measurement of AC Signals

Номер: US20170023621A1
Автор: Demirci Kemal S., Tasevski Viktor
Принадлежит:

In described examples, an apparatus includes: an input terminal for receiving an alternating current voltage signal; a clamping circuit coupled to the input terminal outputting a clamped voltage signal that is constrained in magnitude; a first comparator coupled to the clamped voltage signal outputting a first compare signal when the clamped voltage signal is a positive voltage that exceeds a positive threshold; and a second comparator coupled to the clamped voltage signal outputting a second compare signal when the clamped voltage signal is a negative voltage that exceeds a negative threshold. The apparatus includes a timer circuit coupled to the first and second compare signal outputting a time duration signal corresponding to a time between the first and second compare signals; and a logic circuit coupled to the time duration output signal determining a peak voltage of the alternative current voltage signal responsive to the time duration output signal. 1. An apparatus , comprising:an input terminal for receiving an alternating current voltage signal;a clamping circuit coupled to the input terminal, the clamping circuit configured to output a clamped voltage signal that is constrained between a positive voltage magnitude and a negative voltage magnitude;a first comparator coupled to the clamped voltage signal, and configured to output a first compare signal when the clamped voltage signal is a positive voltage that exceeds a positive threshold reference voltage;a second comparator coupled to the clamped voltage signal and configured to output a second compare signal when the clamped voltage signal is a negative voltage that exceeds a negative threshold reference voltage;a timer circuit coupled to the first compare signal and coupled to the second compare signal and coupled to a clock signal, and configured to output a time duration output signal corresponding to a time interval between the first and second compare signals; anda logic circuit coupled to the time ...

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Номер записи: 53
26-01-2017 дата публикации

Radio-frequency voltage detection

Номер: US20170023622A1
Автор: Edward John Wemyss Whittaker
Принадлежит: Skyworks Solutions Inc

Methods and apparatus are provided for detection of voltage levels of RF signals. A first voltage correction is provided based on a thermal voltage and a second voltage correction is provided based on a voltage difference between a detection transistor, used for the rectification of the RF signal, and a reference transistor, to which the RF signal is not supplied. Based on the first and second voltage corrections, a more accurate detector with greater linearity may be obtained. In an embodiment, the second voltage correction may be generated proportional to a hyperbolic tangent of the voltage difference between two transistors, obtained using an additional pair of transistors configured as a differential pair. Applications include the control of a power amplifier output in a wireless device.

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Номер записи: 54
26-01-2017 дата публикации

APPARATUS FOR PERFORMING RESISTANCE CONTROL ON A CURRENT SENSING COMPONENT IN AN ELECTRONIC DEVICE, AND ASSOCIATED METHOD

Номер: US20170023626A1
Автор: KUNG NIEN-HUI
Принадлежит:

An apparatus for performing resistance control on a current sensing component in an electronic device and an associated method are provided. For example, the apparatus may comprise a power switching unit and a feedback module, and the power switching unit is utilized as the current sensing component when the power switching unit enables the power path. The feedback module may comprise: a power switching unit replica that receives a first voltage at the battery terminal and outputs a second voltage; a first current source, coupled between the power switching unit replica and a ground terminal, arranged to receive the second voltage; a reference voltage generator that generates a third voltage; and an error amplifier that receives the second voltage and the third voltage and outputs a fourth voltage, wherein the feedback module controls both of the power switching unit and the power switching unit replica according to the fourth voltage. 1. An apparatus for performing resistance control on a current sensing component in an electronic device , the apparatus comprising at least one portion of the electronic device , the apparatus comprising:a power switching unit, positioned within the electronic device, arranged to selectively enable or disable a power path between a system terminal and a battery terminal within the electronic device, wherein the system terminal is utilized for coupling a main system circuit of the electronic device, and the battery terminal is utilized for coupling a battery of the electronic device, wherein the power switching unit is utilized as the current sensing component when the power switching unit enables the power path, and the current sensing component measures current on the power path; a power switching unit replica that receives a first voltage at the battery terminal and outputs a second voltage;', 'a first current source, coupled between the power switching unit replica and a ground terminal, arranged to receive the second voltage;', ' ...

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Номер записи: 55
25-01-2018 дата публикации

REFRIGERATOR

Номер: US20180023885A1
Автор: CHOI Byoungsuk, HU Jinseok, Kim Sun, PARK Shinhyun
Принадлежит:

A refrigerator according to an embodiment of the present invention includes a power input part through which power is input from a UPS device connected to a commercial power source and an auxiliary power source; a voltage sensor configured to sense a voltage of the power input through the power input part; and a control part configured to analyze a voltage signal sensed by the voltage sensor and to determine whether the input power is commercial power or auxiliary power. 137-. (canceled)38. A refrigerator comprising:a power input part connected to a UPS device which is connected to an auxiliary power source and a commercial power source and selectively supplies power;a compressor;a voltage sensor configured to sense a voltage input through the power input part; anda control part configured to analyze a voltage signal sensed by the voltage sensor and to determine whether the input power is commercial power or auxiliary power,wherein the control part performs a primary determination through an analysis of the sensed voltage signal, performs a secondary determination through the analysis of the voltage signal sensed before and after driving of the compressor when it is determined that the power is not the auxiliary power, and determines whether the input power is the commercial power or the auxiliary power.39. The refrigerator of claim 38 , wherein claim 38 , in the primary determination claim 38 , when a waveform of the voltage signal sensed by the voltage sensor is a square wave claim 38 , the control part determines that the input power is the auxiliary power.40. The refrigerator of claim 39 , wherein claim 39 , in the secondary determination claim 39 , when a peak value of a voltage waveform of the compressor is dropped claim 39 , the control part determines that the input power is the auxiliary power.41. The refrigerator of claim 39 , wherein claim 39 , in the secondary determination claim 39 , when amplitude of a third harmonic wave after the driving of the ...

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Номер записи: 56
24-04-2014 дата публикации

CURRENT SENSOR

Номер: US20140111196A1
Автор: Kinpara Takamasa, Kurumado Norihiro, NOMURA Kousuke, Sakai Ryosuke
Принадлежит: Denso Corporation

A current sensor for measuring a current flowing through a conductor includes a sensor substrate, a magnetoelectric converter formed on a surface of the sensor substrate and configured to output a signal changing with an applied magnetic field, and a magnetic shield that surrounds the sensor substrate and the conductor to magnetically shield the inside from the outside. The output signal of the magnetoelectric converter changes with a magnetic filed applied along the formation surface of the sensor substrate. The magnetic shield has at least one gap for reducing magnetic saturation in the magnetic shield. The gap and the sensor substrate are located at the same height in a z-direction orthogonal to the formation surface of the sensor substrate. 1. A coreless current sensor for measuring a current flowing through a conductor , the current sensor comprising:a sensor substrate;a magnetoelectric converter formed on a surface of the sensor substrate and configured to output a signal changing with an applied magnetic field, anda magnetic shield that surrounds the sensor substrate and the conductor to magnetically shield the inside from the outside, whereinthe current is measured based on a change in the output signal caused by a magnetic field induced by the current,the output signal of the magnetoelectric converter changes with a magnetic filed applied along the formation surface of the sensor substrate,the magnetic shield has at least one gap for reducing magnetic saturation in the magnetic shield, andthe gap and the sensor substrate are located at the same height in a z-direction orthogonal to the formation surface of the sensor substrate.2. The current sensor according to claim 1 , wherein the formation surface is parallel to a x-y plane defined by a x-direction and a y-direction that are orthogonal to each other claim 1 ,an outline of an inner wall of the magnetic shield divided by a x-z plane defined by the x-direction and the z-direction passing the formation ...

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Номер записи: 57
29-01-2015 дата публикации

Trace Gas Concentration in ART MS Traps

Номер: US20150028882A1
Автор: Brucker Gerardo A., Rathbone G. Jeffery, Swinney Timothy C.
Принадлежит:

A method of detecting specific gas species in an ion trap, the specific gas species initially being a trace component of a first low concentration in the volume of gas, includes ionizing the gas including the specific gas species, thereby creating specific ion species. The method further includes producing an electrostatic potential in which the specific ion species are confined in the ion trap to trajectories. The method also includes exciting confined specific ion species with an AC excitation source having an excitation frequency, scanning the excitation frequency of the AC excitation source to eject the specific ion species from the ion trap, and detecting the ejected specific ion species. The method further includes increasing the concentration of the specific ion species within the ion trap relative to the first low concentration prior to scanning the excitation frequency that ejects the ions of the specific gas species. 1. A method of detecting specific gas species in an ion trap , the specific gas species initially being a trace component of a first low concentration in a volume of gas , the method comprising:i) ionizing the gas including the specific gas species, thereby creating specific ion species;ii) producing an electrostatic potential in which the specific ion species are confined in the ion trap to trajectories, at natural oscillation frequencies, in an electrode structure that includes first and second opposed mirror electrodes and a central lens electrode therebetween;iii) exciting confined specific ion species with an AC excitation source having an excitation frequency;iv) scanning the excitation frequency of the AC excitation source to eject the specific ion species from the ion trap; and 'the method further comprising increasing the concentration of the specific ion species within the ion trap relative to the first low concentration prior to scanning the excitation frequency that ejects the ions of the specific gas species.', 'v) detecting the ...

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Номер записи: 58
23-01-2020 дата публикации

METHOD AND APPARATUS FOR DETECTING CURRENT USING OPERATIONAL AMPLIFIER

Номер: US20200025806A1
Автор: Lee Chungkwon, Lee Su-Min
Принадлежит:

The present disclosure relates to a current detecting apparatus using an operational amplifier and a method thereof. In accordance with an aspect of the present disclosure, there is provided a current detecting apparatus of a conductor including: a shunt resistor connected to the conductor; an operational amplifier connected to the shunt resistor; a first resistor connected between the shunt resistor and a first input terminal of the operational amplifier; a second resistor connected between the shunt resistor and a second input terminal of the operational amplifier; a third resistor connected between a ground and the first input terminal of the operational amplifier; and a fourth resistor connected between the ground and the second input terminal of the operational amplifier. 1. A current detecting apparatus of a conductor comprising:a shunt resistor connected to the conductor;an operational amplifier connected to the shunt resistor;a first resistor connected between the shunt resistor and a first input terminal of the operational amplifier;a second resistor connected between the shunt resistor and a second input terminal of the operational amplifier;a third resistor connected between a ground and the first input terminal of the operational amplifier; anda fourth resistor connected between the ground and the second input terminal of the operational amplifier.2. The current detecting apparatus of claim 1 , wherein the operational amplifier is a ground line operational amplifier.3. The current detecting apparatus of claim 1 , wherein a resistance of the first resistor and a resistance of the second resistor are the same claim 1 , and a resistance of the third resistor and a resistance of the fourth resistor are the same.4. The current detecting apparatus of claim 1 , wherein a ratio of a resistance of the third resistor to a resistance of the first resistor is equal to a ratio of a resistance of the fourth resistor to a resistance of the second resistor.5. The ...

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Номер записи: 59
23-01-2020 дата публикации

CIRCUIT AND METHOD FOR DETECTING A CREEPING SHORT CIRCUIT IN BRIDGE CONNECTIONS

Номер: US20200025816A1
Автор: Chauvet Yannick, Sanchez Pinzon Federico Ignacio, Zondler Johannes
Принадлежит:

A circuit for detecting a creeping short circuit in bridge connections. The circuit includes a first detection device for a power loss at a battery-side connection of the bridge connection to a first counting register and a second detection device for a power loss at a ground-side connection of the bridge connection to a second counting register. 113-. (canceled)14. A circuit for detecting a creeping short circuit in a bridge connection , comprising:a first detection device for a power loss at a battery-side connection of the bridge connection, the first detection device including a first counting register; anda second detection device for a power loss at a ground-side connection of the bridge connection, the second detection device including a second counting register.15. The circuit of claim 14 , wherein the detection devices for the power losses are configured to compute the power losses using the square of a measured current intensity.16. The circuit of claim 15 , wherein the detection devices for the power losses are configured to compute the power loss with the aid of the It principle using the square of the measured current intensity.17. The circuit of claim 14 , wherein the counting registers are configured to increase their count values as a function of the detected power loss.18. The circuit of claim 14 , wherein the counting registers have a maximum count value.19. A method for detecting a creeping short circuit in bridge connections with a circuit claim 14 , the method comprising:detecting a power loss at a battery-side connection of a bridge connection by a first detection device, wherein the circuit for detecting includes the first detection device for the power loss at the battery-side connection of the bridge connection, the first detection device including a first counting register, and a second detection device for a power loss at a ground-side connection of the bridge connection, the second detection device including a second counting register; ...

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Номер записи: 60
28-01-2021 дата публикации

CURRENT SENSE CIRCUIT AND METHOD THEREOF

Номер: US20210025923A1
Автор: Tornila Oliver Jaume
Принадлежит:

A current sense circuit is provided. The current sense circuit includes an input terminal coupled to sense an input current. A first terminal of a diode is coupled as the input terminal. A current limiter has a first terminal coupled to a second terminal of the diode. A current source is coupled to a second terminal of the current limiter and configured to generate a first current. A current mirror includes a first leg coupled to the current limiter and the current source and a second leg coupled for providing an output current. 1. A current sense circuit comprising:an input terminal coupled to sense an input current;a diode having a first terminal and a second terminal, the first terminal coupled at the input terminal;a current limiter having a first terminal and a second terminal, the first terminal coupled to the second terminal of the diode at a first node;a first current source having a first terminal and a second terminal and configured to generate a first current, the first terminal coupled to the second terminal of the current limiter at a second node; anda first current mirror coupled to a first voltage supply terminal and having a first leg and a second leg, the first leg coupled at the second node and the second leg coupled for generating a first output current.2. The current sense circuit of claim 1 , further comprising:a second current source having a first terminal and a second terminal and configured to generate a second current, the first terminal coupled to the second leg of the first current mirror at a third node.3. The current sense circuit of claim 1 , further comprising:a capacitor having a first terminal and a second terminal, the first terminal coupled at the first node and the second terminal coupled at the first voltage supply terminal.4. The current sense circuit of claim 1 , further comprising:a clamp circuit having a first terminal and a second terminal, the first terminal coupled at the input terminal and the second terminal coupled at ...

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Номер записи: 61
28-01-2021 дата публикации

Peak detector calibration

Номер: US20210025924A1
Автор: Dmytro Cherniak, Fabio Padovan, Giovanni Boi, Matteo Bassi
Принадлежит: INFINEON TECHNOLOGIES AG

A calibration circuit for calibrating a peak detector configured to detect a signal peak amplitude of an oscillator, including: a calibration oscillator configured to be supplied by at least two different supply voltages to generate respective calibration signals; a calibration peak detector configured to detect a calibration signal peak amplitude of each of the calibration signals; and a logic circuit configured to calibrate the peak detector based on the detected calibration signal peak amplitudes.

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Номер записи: 62
10-02-2022 дата публикации

METHOD AND APPARATUS FOR MODULATING AMPLIFIER SUPPLY VOLTAGE FOR REDUCING POWER DISSIPATION

Номер: US20220045648A1
Автор: Humbert Donald, Salcedo Miguel, Tirumala Rohit
Принадлежит: MICROCHIP TECHNOLOGY INCORPORATED

A circuit to modulate the power supply to track input or output voltages provided to or output by a plurality of amplifiers to reduce power dissipation is provided. The circuit may include a peak detection circuit configured to receive a plurality of voltages respectively corresponding to the plurality of amplifiers, and to detect and output information regarding a maximum instantaneous voltage from the received plurality of voltages, and a summing circuit configured to output a sum of the information regarding the maximum instantaneous voltage and an amplifier headroom voltage. A reference voltage may be provided for the supply voltage responsive to the output sum. The circuit may also include a scaling circuit configured to scale the output sum, and the reference voltage may be a scaled reference voltage output by the scaling circuit. 1. A circuit for modulating a power supply voltage provided to a plurality of amplifiers , the circuit comprising:a peak detection circuit configured to receive respective analog input voltages provided to the plurality of amplifiers, and to detect and output information regarding a maximum instantaneous analog input voltage from the received respective analog input voltages; anda summing circuit configured to output a sum of the information regarding the maximum instantaneous analog input voltage output from the peak detection circuit and an amplifier headroom voltage,wherein a reference voltage is provided for the power supply voltage responsive to the output sum.2. The circuit of claim 1 , further comprising a scaling circuit configured to scale the output sum claim 1 , wherein the reference voltage provided for the power supply voltage is responsive to an output of the scaling circuit.3. The circuit of claim 1 , wherein the information regarding the maximum instantaneous analog input voltage is the maximum instantaneous analog input voltage.4. The circuit of claim 1 , wherein the amplifier headroom voltage is a predetermined ...

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Номер записи: 63
04-02-2016 дата публикации

ASSEMBLY OF CURRENT SENSOR AND POWER CONDUCTOR

Номер: US20160033557A1
Автор: HWANGBO Cheon
Принадлежит: Hyundai Mobis Co., Ltd.

An assembly of a current sensor and a power conductor may include a first conductor, a second conductor spaced apart from the first conductor, a third conductor connecting one end of the first conductor to one end of the second conductor, and a fourth conductor vertically spaced apart from the third conductor and connecting one end of the first conductor to one end of the second conductor, a fixed space being defined between the third and fourth conductors. 1. An assembly of a current sensor and a power conductor , the assembly comprising:a first conductor;a second conductor spaced apart from the first conductor;a third conductor connecting one end of the first conductor to one end of the second conductor; anda fourth conductor vertically spaced apart from the third conductor and connecting one end of the first conductor to one end of the second conductor, a fixed space being defined between the third and fourth conductors.2. The assembly of claim 1 , further comprising a current sensor installed in the fixed space to sense a magnetic field formed by the third conductor and a magnetic field formed by the fourth conductor so as to measure currents flowing therethrough.3. The assembly of claim 2 , further comprising a first circuit module installed between the current sensor and the third conductor to be connected to the current sensor.4. The assembly of claim 3 , wherein the first circuit module comprises an insulator.5. The assembly of claim 2 , further comprising an insulator arranged between the current sensor and the third conductor.6. The assembly of claim 2 , further comprising a second circuit module installed between the current sensor and the fourth conductor to be connected to the current sensor.7. The assembly of claim 6 , wherein the second circuit module comprises an insulator.8. The assembly of claim 2 , further comprising an insulator arranged between the current sensor and the fourth conductor.9. The assembly of claim 1 , wherein at least one of the ...

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Номер записи: 64
01-05-2014 дата публикации

CURRENT DETECTION CIRCUIT

Номер: US20140117972A1
Автор: CHIBA Akiteru, ISHIKURA Keita
Принадлежит: Sanken Electric Co., Ltd.

Provided is a current detection circuit which can reduce the resistance loss for a current transformer, meeting the requirements for size and cost thereof. The current detection circuit includes a current transformer and a capacitor connected across a secondary winding of the current transformer, the capacitor making a phase adjustment such that the primary side current flowing through the primary winding of the current transformer and the voltage across the capacitor are in phase with each other. With this configuration, the primary side current can be detected as the voltage across the capacitor with no need for using a matching resistor, with which, if the winding ratio of the current transformer is small, the resistance loss will be large, whereby a current detection circuit of low loss using a current transformer which is small in size and low in cost can be configured. 1. A current detection circuit , comprising: a current transformer , anda capacitor connected across a secondary winding of the current transformer,the voltage across said capacitor being phase-adjusted to be in phase with the primary side current flowing through the primary winding of said current transformer.2. The current detection circuit according to claim 1 , wherein there is provided a series circuit of a resistor connected across the secondary winding of said current transformer and said capacitor claim 1 ,said series circuit phase-adjusting the voltage across said capacitor to be in phase with the current flowing through the primary winding of said current transformer.3. The current detection circuit according to claim 2 , wherein claim 2 , assuming that the resistance value of said resistor is R; the capacitance of said capacitor is C; the secondary side inductance of said current transformer is Ls; the secondary side leakage inductance of said current transformer is Lr; and the secondary winding resistor of said current transformer is Rr claim 2 , said resistor and said capacitor are ...

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Номер записи: 65
01-05-2014 дата публикации

FAULT CURRENT DETECTING CIRCUIT

Номер: US20140118001A1
Автор: BANG Seung Hyun, CHOE Won Joon, KIM Min Jee, LEE Gyeong Ho, PARK Hae Yong, SIM Jung Wook
Принадлежит: LSIS CO., LTD.

The fault current detecting circuit includes: a current detection unit that outputs a current detection signal; a first comparing circuit unit that compares the current detection signal with a predetermined reference current value and outputs a first output signal; a differentiator that differentiates the current detection signal to output a change slope of the current detection signal; a second comparing circuit unit that compares the change slope with a predetermined reference change slope value and outputs a second output signal; a third comparing circuit unit that compares the current detection signal with a predetermined current detection limit reference value and output a third output signal; and a trip determining unit that outputs a trip control signal only when the first output signal and the second output signal are maintained to be received and the third output signal is not received. 1. A fault current detecting circuit comprising:a current detection unit configured to detect a current flowing in an electric power circuit in an electric power system and output a current detection signal;a first comparing circuit unit configured to compare the current detection signal with a predetermined reference current value and output a first output signal when the current detection signal is greater than or equal to the reference current value;a differentiator configured to differentiate the current detection signal output from the current detection unit to output a change slope of the current detection signal;a second comparing circuit unit configured to compare the change slope with a predetermined reference change slope value and output a second output signal when the change slope of the current detection signal is greater than or equal to the reference change slope value;a third comparing circuit unit configured to compare the current detection signal with a predetermined current detection limit reference value and output a third output signal when the current ...

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Номер записи: 66
01-05-2014 дата публикации

HIGHLY ACCURATE TRUE RMS POWER DETECTOR FOR CELLULAR APPLICATIONS

Номер: US20140118050A1
Автор: Behera Manas, PRAKASH Chandra B., Uehara Gregory T.
Принадлежит: MARVELL WORLD TRADE LTD.

New devices and methods capable of detecting a true Root-Mean-Square (RMS) power level of an analog input signal are disclosed. For example, an electronic circuit can include a squaring circuit that receives the analog input signal and processes the analog input signal so as to produce a squared-output of the analog input signal using an analog transfer function of the squaring circuit, and a square-root circuit that receives the squared-output and processes the squared-output using an analog transfer function of the square-root circuit so as to produce an analog RMS output signal representing the true RMS power level of the analog input signal. 1. An electronic circuit capable of detecting a true Root-Mean-Square (RMS) power level of an analog input signal , comprisinga squaring circuit that receives the analog input signal and processes the analog input signal so as to produce a squared-output of the analog input signal using an analog transfer function of the squaring circuit; anda square-root circuit that receives the squared-output and processes the squared-output using an analog transfer function of the square-root circuit so as to produce an analog RMS output signal representing the true RMS power level of the analog input signal.2. The electronic circuit of claim 1 , wherein the squaring circuit includes one or more transistors that provide a squaring function using an analog squaring transfer function of its one or more transistors.3. The electronic circuit of claim 2 , wherein the squaring circuit includes one or more Metal Oxide Semiconductor (MOS) field-effect transistors.4. The electronic circuit of claim 1 , wherein the square-root circuit includes one or more transistors operable to provide a square-root function using an analog square-root transfer function of its one or more transistors5. The electronic circuit of claim 3 , wherein the square-root circuit includes one or more MOS field-effect transistors.6. The electronic circuit of claim 3 , ...

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Номер записи: 67
02-02-2017 дата публикации

VOLTAGE PEAK DETECTION CIRCUIT AND DETECTION METHOD

Номер: US20170033697A1
Автор: Xu Xiaoru
Принадлежит:

In one embodiment, a voltage peak detection circuit can include: (i) a voltage coupling circuit configured to inductively couple an input inductor voltage of a switching power supply, and to generate a first voltage that represents a DC input voltage of the switching power supply; (ii) a voltage conversion circuit configured to receive the first voltage, and to generate a second voltage that is proportional to the first voltage; and (iii) a holding circuit configured to hold a peak of the second voltage to generate a peak voltage signal that represents peak information of the DC input voltage. 1. A voltage peak detection circuit , comprising:a) a voltage coupling circuit configured to inductively couple an input inductor voltage of a switching power supply, and to generate a first voltage that represents a DC input voltage of said switching power supply;b) a voltage conversion circuit configured to receive said first voltage, and to generate a second voltage that is proportional to said first voltage; andc) a holding circuit configured to hold a peak value of said second voltage to generate a peak voltage signal that represents a peak value of said DC input voltage, wherein a time constant of said holding circuit is configured to meet a transient response requirement of said peak value of said DC input voltage.2. The voltage peak detection circuit of claim 1 , wherein said voltage coupling circuit comprises an auxiliary inductor coupled to an input inductor of said switching power supply claim 1 , and said first voltage is generated based on an induced voltage of said auxiliary inductor.3. The voltage peak detection circuit of claim 1 , wherein said voltage conversion circuit comprises:a) a voltage-current conversion circuit configured to receive said first voltage, and to generate a first current based on said first voltage;b) said voltage-current conversion circuit being configured to generate a mirror current by mirroring said first current; andc) a current- ...

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Номер записи: 68
30-01-2020 дата публикации

CURRENT SENSOR, AND MANUFACTURING METHOD FOR CURRENT SENSOR

Номер: US20200033384A1
Автор: Kishi Noritaka, SHIMIZU Yasuhiro
Принадлежит:

A current sensor that outputs an output signal according to a signal magnetic field that is generated by a current to be measured is provided. The current sensor includes at least one magnetic sensor, a temperature sensor, an amplifier, and an offset adjusting circuit. The magnetic sensor generates a sensor signal commensurate with the signal magnetic field. The temperature sensor detects an ambient temperature. The amplifier amplifies the sensor signal at an amplification rate commensurate with the detected temperature and generates the output signal. The offset adjusting circuit adjusts an offset of the output signal. The offset adjusting circuit adjusts an offset in accordance with a relationship (mathematical expression) that holds between an output signal under no signal magnetic field and an amplification rate corresponding to the temperature. 1. A current sensor that outputs an output signal according to a signal magnetic field that is generated by a current to be measured , the current sensor comprising:at least one magnetic sensor that generates a sensor signal commensurate with the signal magnetic field;a temperature sensor that detects an ambient temperature;an amplifier that amplifies the sensor signal at an amplification rate corresponding to the detected temperature and generates the output signal; andan offset adjusting circuit that adjusts an offset that is a deviation of an output signal from a reference value under no signal magnetic field; whereinthe offset adjusting circuit adjusts the offset in accordance with a relationship between the output signal under no signal magnetic field and the amplification rate corresponding to the temperature.2. The current sensor according to claim 1 , wherein the amplification rate of the amplifier is set to a predetermined value to correct variations claim 1 , commensurate with a temperature claim 1 , in magnetoelectric conversion gain for the magnetic sensor to generate the sensor signal.3. The current sensor ...

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Номер записи: 69
11-02-2016 дата публикации

SENSOR DEVICES AND METHODS FOR USE IN SENSING CURRENT THROUGH A CONDUCTOR

Номер: US20160041204A1
Автор: Bietz Steven Lee, Chamarti Subramanyam Satyasurya
Принадлежит:

A sensor device for use in detecting current in a conductor is provided. The sensor includes a non-magnetic substrate defining an aperture structured to receive a conductor therein, a coil comprising a plurality of turns wound about at least a portion of the substrate, and a housing for enclosing the substrate and coil. The housing includes a dielectric material having a dielectric constant and positioned adjacent to the coil and at least partially within the aperture such that the dielectric material is disposed between the coil and the conductor when the conductor is received through the aperture and at least one spacer coupled to the aperture to facilitate maintaining a position of the coil relative to the conductor, wherein each of the spacers is positioned offset from the dielectric material such that each of the spacers does not radially extend between the coil and the conductor. 1. A sensor device for use in detecting current in a conductor , said sensor device comprising:a non-magnetic substrate defining an aperture structured to receive a conductor therein;a coil comprising a plurality of turns wound about at least a portion of said substrate; and a dielectric material having a dielectric constant and positioned adjacent to said coil and at least partially within said aperture such that said dielectric material is disposed between said coil and said conductor when said conductor is received through said aperture; and', 'at least one spacer coupled to said aperture of said housing to facilitate maintaining a position of said coil relative to said conductor, wherein each of said spacers is positioned offset from said dielectric material such that each of said spacers does not radially extend between said coil and said conductor., 'a housing for enclosing said substrate and coil, said housing comprising2. The sensor device of claim 1 , wherein said housing further comprises:a first portion; anda second portion, wherein said second portion couples to said first ...

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Номер записи: 70
09-02-2017 дата публикации

POWER THEFT LOCATION IDENTIFICATION IN DISTRIBUTION SYSTEMS USING VOLTAGE READING FROM SMART METERS

Номер: US20170038415A1
Автор: Dasgupta Kalyan Kanti, Hazra Jagabondhu, Padmanaban Manikandan
Принадлежит:

Methods and arrangements for power theft location in an electrical grid. A contemplated method includes: utilizing at least one processor to execute computer code that performs the steps of: receiving an indication of a voltage of a plurality of nodes in the branch of the electrical distribution grid; identifying voltage differences between at least of two of the plurality of the nodes over a predetermined number of days, relative to different time periods within each day, wherein the at least two of the plurality of the nodes are at a known relative position in the branch of the electrical distribution grid; and evaluating the identified voltage differences to determine whether the identified voltage differences satisfy a predetermined criterion indicating no power theft. Other variants and embodiments are broadly contemplated herein. 1. A method of locating power theft in a branch of an electrical distribution grid , said method comprising:utilizing at least one processor to execute computer code that performs the steps of:receiving an indication of a voltage of a plurality of nodes in the branch of the electrical distribution grid;identifying voltage differences between at least of two of the plurality of the nodes over a predetermined number of days, relative to different time periods within each day, wherein the at least two of the plurality of the nodes are at a known relative position in the branch of the electrical distribution grid; andevaluating the identified voltage differences to determine whether the identified voltage differences satisfy a predetermined criterion indicating no power theft.2. The method according to claim 1 , wherein the predetermined criterion involves variance in a calculated equivalent load at a distribution substation in the electrical distribution grid.3. The method according to claim 2 , wherein said determining comprises determining whether variance in the calculated equivalent load over the predetermined number of days falls ...

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Номер записи: 71
31-01-2019 дата публикации

SYSTEM AND METHOD FOR TIMING SYNCHRONIZATION OF A SELF-POWERED POWER SENSOR

Номер: US20190037515A1
Автор: Aljadeff Daniel, Shamir Adi
Принадлежит: PANORAMIC POWER LTD.

A system and method for the wireless synchronization of a self-powered power sensor (SPPS) to a central controller for calculating a value of an electrical parameter. The method includes receiving from a central controller a message that includes timing information of the central controller time base; sampling at least an electrical signal respective of a powerline connected to an SPPS; estimating from the samples of the at least an electrical signal at least a first electrical parameter, where the at least a first electrical parameter is adjusted using the timing information; generating a packet; appending to the packet the estimated at least a first electrical parameter; and transmitting the packet to the central controller. 1. A method for the wireless synchronization of a self-powered power sensor (SPPS) to a central controller for calculating a value of an electrical parameter , the method comprising:receiving from a central controller a message that includes timing information of the central controller time base;sampling at least an electrical signal respective of a powerline connected to an SPPS;estimating from the samples of the at least an electrical signal at least a first electrical parameter, where the at least a first electrical parameter is adjusted using the timing information;generating a packet;appending to the packet the estimated at least a first electrical parameter; andtransmitting the packet to the central controller.2. The method of claim 1 , further comprising:estimating via the SPPS at least a second electrical parameter from the sampled information.3. The method of claim 2 , further comprising:appending to the packet the at least a second electrical parameter.4. The method of claim 2 , wherein the at least a second electrical parameter is a root mean square value of the at least an electrical signal.5. The method of claim 1 , wherein the at least an electrical signal is a current.6. The method of claim 5 , further comprising:receiving from ...

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Номер записи: 72
12-02-2015 дата публикации

SEMICONDUCTOR DEVICE

Номер: US20150042373A1
Автор: NAKAMURA Hiroyuki
Принадлежит: Mitsubishi Electric Corporation

A semiconductor device capable of simplifying wiring work is provided. A semiconductor device includes a semiconductor element (insulated gate bipolar transistor IGBT) provided with an emitter main electrode and an emitter sense electrode, an integrated circuit having a detection terminal and a mold resin body that seals the semiconductor element and the integrated circuit, and a lead. The lead is provided with an inner lead part sealed in the mold resin body and electrically connected to the emitter sense electrode, an inner lead part sealed in the mold resin body and electrically connected to the emitter main electrode, and an outer lead part connected to the lead part on one side, connected to the inner lead part on the other side and exposed outside the mold resin body. 1. A semiconductor device comprising:a semiconductor element provided with a main electrode and a current detection electrode;an integrated circuit having a detection terminal;a mold resin body that seals the semiconductor element and the integrated circuit; anda lead provided with a first inner lead part electrically connected to the current detection electrode sealed in the mold resin body, a second inner lead part sealed in the mold resin body and electrically connected to the main electrode and an outer lead part connected to the first inner lead part on one side, connected to the second inner lead part on the other side and exposed outside the mold resin body.2. The semiconductor device according to claim 1 , wherein a notch extending in a lateral direction of the outer lead part is provided on a surface of the outer lead part.3. The semiconductor device according to claim 1 , wherein the integrated circuit performs alternative voltage detection on the main electrode and the current detection electrode via the detection terminal claim 1 , determines claim 1 , when the voltage of the detection terminal exceeds a first threshold claim 1 , that an overcurrent abnormality occurs claim 1 , and ...

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Номер записи: 73
09-02-2017 дата публикации

Low loss current sensor and power converter using the same

Номер: US20170040894A1
Автор: Alex C. H. MeVay
Принадлежит: Alex C. H. MeVay

A low-loss current sensor for use with a circuit containing a capacitor to sense a current flowing into a node in the circuit is provided. The current sensor includes a differentiator circuit having an input connected to the circuit capacitor and adapted to generate an output which is proportional to the current flowing through the circuit capacitor. The novel use of a capacitive current divider allows the sensor to sense current with virtually no power dissipation.

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Номер записи: 74
09-02-2017 дата публикации

Phase Shifter Chip Radio Frequency Self-Test

Номер: US20170041087A1
Автор: Feldman Arnold, Mossawir Benjamin Joseph
Принадлежит: GOOGLE INC.

A method for operating a phase shifter chip RF self-test. The method includes outputting, by control hardware, a first signal from a phased locked loop to a pre-amplifier and an input peak detector, outputting, by the control hardware, a second signal from the pre-amplifier to a device under test, selecting, by the control hardware, a target level, and adjusting, by the control hardware, a pre-amplifier gain of the pre-amplifier to cause the input peak detector value to approximately match the target level. The input peak detector is configured to output an input peak detector value based on the first signal. 1. A method comprising:outputting, by control hardware, a first signal from a phased locked loop to a pre-amplifier and an input peak detector, wherein the input peak detector is configured to output an input peak detector value based on the first signal;outputting, by the control hardware, a second signal from the pre-amplifier to a device under test;selecting, by the control hardware, a target level; andadjusting, by the control hardware, a pre-amplifier gain of the pre-amplifier to cause the input peak detector value to approximately match the target level.2. The method of claim 1 , further comprising:adjusting, by the control hardware, a precision variable gain adjuster connected to the pre-amplifier; andmeasuring an output peak detector value of an output peak detector connected to an output of the device under test.3. The method of claim 2 , further comprising adjusting claim 2 , by the control hardware claim 2 , a device under test gain of the device under test until the output peak detector value approximately matches the target level.4. The method of claim 3 , further comprising:stopping, by the control hardware, all signals to the pre-amplifier and the device under test;measuring, by the control hardware, a current input peak detector value of the input peak detector as an input peak detector offset; andmeasuring a current output peak detector value ...

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Номер записи: 75
07-02-2019 дата публикации

MAGNETIC SENSOR AND ELECTRIC CURRENT SENSOR INCLUDING SAME

Номер: US20190041432A1
Автор: SHIMIZU Yasuhiro
Принадлежит:

An electric current sensor includes at least one permanent magnet and at least one magnetosensitive body that detects a to-be-measured magnetic field in a state in which a bias magnetic field is applied thereto from the permanent magnet. The permanent magnet is shaped such that the value of a permeance coefficient obtained when taking the application direction of the to-be-measured magnetic field as the magnetization direction is less than or equal to about 1.5 times the value of the permeance coefficient in a magnetization direction of the permanent magnet. 1. A magnetic sensor that measures a strength of a magnetic field to be measured , the magnetic sensor comprising:at least one permanent magnet; andat least one magnetosensitive body that detects the magnetic field to be measured in a state in which a bias magnetic field is applied thereto from the permanent magnet; whereinthe permanent magnet is shaped such that a value of a permeance coefficient obtained when taking an application direction of the magnetic field to be measured as a magnetization direction is less than or equal to about 1.5 times a value of a permeance coefficient in a magnetization direction of the permanent magnet.2. The magnetic sensor according to claim 1 , wherein the permanent magnet is shaped such that the value of the permeance coefficient obtained when taking the application direction of the magnetic field to be measured as the magnetization direction is less than or equal to the value of the permeance coefficient in the magnetization direction of the permanent magnet.3. The magnetic sensor according to claim 2 , wherein the permanent magnet is shaped such that the value of the permeance coefficient obtained when taking the application direction of the magnetic field to be measured as the magnetization direction is less than or equal to about 0.6 times the value of the permeance coefficient in the magnetization direction of the permanent magnet.4. The magnetic sensor according to claim ...

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Номер записи: 76
24-02-2022 дата публикации

Method for calculating maximum output current of multiple thyristor converters connected in parallel

Номер: US20220060106A1
Автор: Liansheng Huang, Peng Fu, Shiying HE, Tao Chen, Tianbai DENG, Xiaojiao CHEN, Xiuqing Zhang, Zhenshang WANG, Zhongma WANG
Принадлежит: Hefei Institutes of Physical Science of CAS

A method for calculating a maximum output current of multiple thyristor converters connected in parallel, step 1 : setting an operating time t; step 2 : assuming a trigger angle; step 3 : calculating a maximum output current of a single converter according to an output current model for the single converter; step 4 : equally dividing a total output DC current into a plurality of parts according to a working duration of six converter bridge arms, thereby obtaining a pulse operating current of a single bridge arm; step 5 : checking whether a present junction temperature of a thyristor is below a limiting temperature based on a thermal resistance model for the thyristor, if no, correcting the trigger angle, and repeating step 2 to step 5 until the condition is met; step 6 : giving a present trigger angle; and step 7 : giving a maximum output current of multiple converters connected in parallel.

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Номер записи: 77
16-02-2017 дата публикации

Method for Identifying Subtle Quiescent Current Errors

Номер: US20170045566A1
Автор: Dominik Kerler, Rupert Neudecker
Принадлежит: Bayerische Motoren Werke AG

A method and a corresponding device are provided for recognizing a faulty quiescent current behavior of a vehicle, in particular for identifying a quiescent current threshold value for an electrical on-board network of a vehicle. The method includes the identifying of a plurality of quiescent current data sets of a corresponding plurality of vehicles. A quiescent current data set of a vehicle includes a quiescent current measured value of the vehicle and a value for one or a plurality of vehicle parameters of the vehicle. The method furthermore includes the identifying of a plurality of classes via cluster analysis of the plurality of quiescent current data sets. A class includes a vehicle group which is described by one or a plurality of values for one or a plurality of vehicle parameters, and a class-quiescent current for the vehicle group. The method determines a quiescent current threshold value based on at least one of the class-quiescent currents of the plurality of classes.

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Номер записи: 78
06-02-2020 дата публикации

ARC FAULT CIRCUIT INTERRUPTER (AFCI) WITH ARC SIGNATURE DETECTION

Номер: US20200044434A1
Автор: LIM Boon Lum, Raj Samuel
Принадлежит:

In one example, an arc fault circuit interrupter (AFCI) is provided. The AFCI may include a plurality of current arc signature detection blocks configured to output a plurality of corresponding current arc signatures, and a processor. The processor may be configured to receive each of the plurality of current arc signature from each of plurality of current arc signature detection blocks, respectively, and generate a first trigger signal. The processor may be further configured to assess each of the current arc signatures, determine whether an arc fault exists based on the assessment, and generate the first trigger signal if an arc fault is determined to exist. A method for detecting an arc fault is also provided. 126-. (canceled)27. An arc fault circuit interrupter , comprising:a multi-pulse detection block configured to generate a pulse signature; anda processor, providing an arc simulation signal to the multi-pulse detection block,', 'receiving and assessing the pulse signature corresponding the arc simulation signal, and', 'determining that the arc fault circuit interrupter is in an end-of-life condition if the pulse signature corresponding the arc simulation signal is not characterized by a multi-pulse phenomenon for a pulse assessment period., 'wherein the processor is configured to administer a self-test to determine if the arc fault circuit interrupter is in an end-of-life condition by28. The arc fault circuit interrupter of claim 27 , wherein the pulse assessment period extends for at least one AC period.29. The arc fault circuit interrupter of claim 27 , wherein the processor is further configured to:administer the self-test at start-up and cyclically on a self-test interval to determine if the arc fault circuit interrupter is in an end-of-life condition.30. The arc fault circuit interrupter of claim 29 , wherein the self-test interval is between 1 and 3 hours.31. The arc fault circuit interrupter of claim 27 , wherein the processor is further configured to ...

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Номер записи: 79
08-05-2014 дата публикации

ELECTRICAL MEASUREMENT APPARATUS HAVING A DETECTOR PROVIDING AN IDENTIFICATION SIGNAL AND CORRESPONDING METHOD

Номер: US20140125313A1
Автор: Clay Paul, Sykes Ian, Szajdzicka Julia
Принадлежит:

A three-phase toroidal current transducer comprises a cuboid detector body , having three cylindrical passages each for receiving a single-phase cable of a three-phase load (not shown). Each of the three passages has an embedded toroidal winding (not shown) which is used to detect a current in the load cable (also not shown). Signals representing the current in each of the three individual load cables are sent to a meter (not shown), which may be located remotely. The signals are transmitted along a multi-core signal cable , which has a standard connector for a plug-in connection to the meter. One of the wires in the multi-core signal cable is connected to a component in the transducer that identifies the rating of the transducer, so that the meter can determine this automatically when the signal cable is plugged in. 1. Electrical measurement apparatus for measuring an electrical parameter of a device , the apparatus comprising a meter and a detector , wherein the detector is arranged to detect the electrical parameter and transmit a measurement signal to the meter , which signal is representative of the detected electrical parameter , and wherein the detector is arranged to provide to the meter an identification signal for identifying the detector to the meter.2. Electrical measurement apparatus according to claim 1 , wherein the identification signal is derived from a component in the detector or in an electrical connection between the detector and the meter claim 1 , or associated with either.3. Electrical measurement apparatus according to claim 2 , wherein the identification signal is derived from the presence and/or value of the component.4. Electrical measurement apparatus according to wherein the detector comprises a component having a measurable value claim 1 , which measurable value serves as the identification signal.5. Electrical measurement apparatus according to claim 1 , wherein the detector is arranged to communicate with the meter wirelessly.6. ...

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Номер записи: 80
26-02-2015 дата публикации

APPARATUS AND METHOD FOR DETECTION AND ADAPTION TO AN END-OF-LINE RESISTOR AND FOR GROUND FAULT LOCALIZATION

Номер: US20150054522A1
Автор: Boettger Donald M.
Принадлежит:

An apparatus and method for detection and adaption to an end-of-line resistor in a NAC of a control panel or power booster of, for example, an alarm system and for ground fault localization in the alarm system are provided. The apparatus can include a notification appliance circuit, where the notification appliance circuit includes first and second analog input terminals, where the notification appliance circuit includes first and second external output terminals, and where the notification appliance circuit includes an end-of-line resistor. Current can be driven through the notification appliance circuit via the first and second analog input terminals, and voltage can be measured at each of the first and second external output terminals. The measured voltage can be indicative of one of a value of the end-of-line resistor or that a state of the notification appliance circuit is one of open, shorted, ground faulted, or normal. 1. A method comprising:measuring a first voltage on a first terminal of a notification appliance circuit;measuring a second voltage on a second terminal of the notification appliance circuit;determining a voltage drop between the first voltage and the second voltage; anddetermining whether the voltage drop is within a predetermined range.2. The method of further comprising claim 1 , based on the voltage drop claim 1 , determining a value of an end-of-line resistor in the notification appliance circuit.3. The method of wherein the first terminal includes a high side terminal of the notification appliance circuit claim 1 , and wherein the second terminal includes a low side terminal of the notification appliance circuit.4. A method comprising:driving a ground offset voltage of a notification appliance circuit to a first level;while the ground offset voltage is at the first level, measuring a first voltage on a first terminal of the notification appliance circuit;while the ground offset voltage is at the first level, measuring a second voltage on ...

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Номер записи: 81
14-02-2019 дата публикации

CURRENT SENSING CIRCUIT AND METHOD

Номер: US20190049511A1
Автор: BOTTI Edoardo, Brambilla Davide Luigi, Lin Hong Wu
Принадлежит:

A circuit includes a field effect transistor having a gate driven via a drive signal. The field effect transistor has a drain-source voltage drop indicative of the intensity of a current flowing in the current path through the field effect transistor. The circuit also includes a pair of sensing transistors that include a first sensing field effect transistor arranged with its drain and gate coupled with the drain and the gate of the field effect transistor, respectively, and a second sensing field effect transistor having a gate configured for receiving a replica of the drive signal. The second sensing field effect transistor is arranged with its current path in series with the current path of the first sensing field effect transistor. A sensing signal at a sensing node is indicative of the current intensity flowing in the current path of the field effect transistor. 1. A circuit , comprising:a drive signal input configured to carry a drive signal;a field effect transistor having a source and a drain and a current path therebetween, the field effect transistor also having a gate coupled to the drive signal input;a first sensing field effect transistor having a source, a drain coupled to the drain of the field effect transistor, a current path between the source and the drain, and a gate coupled to the gate of the field effect transistor;a second sensing field effect transistor having a gate configured to receive a replica of the drive signal, the second sensing field effect transistor arranged with a current path in series with the current path of the first sensing field effect transistor; anda sensing node between the first sensing field effect transistor and the second sensing field effect transistor, wherein during operation a sensing signal at the sensing node is indicative of a current intensity flowing in the current path of the field effect transistor.2. The circuit of claim 1 , wherein the current path of the second sensing field effect transistor is between ...

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Номер записи: 82
25-02-2021 дата публикации

METHOD FOR MEASURING STATIC ATTRACTION PROPENSITY

Номер: US20210055261A1
Автор: Jindani Rahim, Kholodkov Victor G., Schoots Harrie, Walker Jeffrey L., Yung Wai-shing
Принадлежит: Ascend Performance Materials Operations LLC

A method for measuring the attraction propensity of fabric including the steps of charging a neutralized test fabric, optionally by contacting with a charging fabric, presenting the charged test fabric a predetermined distance from a static-influenced agent such that at least a portion of the static-influenced agent attaches to the charged test fabric, and determining the quantity of attached static-influenced agent. 1. A method for measuring the attraction propensity of a fabric , the method comprising the steps of:charging a neutralized test fabric optionally by contacting with a charging fabric;presenting the charged test fabric a predetermined distance from a static-influenced agent such that at least a portion of the static-influenced agent attaches to the charged test fabric; anddetermining the quantity of attached static-influenced agent.2. The method of claim 1 , wherein the charging comprises tribocharging the neutralized test fabric.3. The method of claim 2 , wherein the tribocharged test fabric has an electric potential of greater than ±0 kV.4. The method of claim 2 , wherein the tribocharging comprises rubbing the charging fabric along a surface of the neutralized test fabric at a speed from 1 in/s to 50 in/s.5. The method of claim 1 , wherein the charged test fabric has an electric potential of greater than ±0 kV.6. The method of claim 1 , wherein the static-influenced agent is present in a pre-measured amount.7. The method of claim 2 , further comprising conditioning the neutralized test fabric and/or the charged test fabric to a controlled environment.8. The method of claim 7 , wherein the controlled environment is maintained at a temperature from 10° C. to 30° C.9. The method of claim 7 , wherein the controlled environment is maintained at a relative humidity from 0% to 70%.10. The method of claim 7 , wherein the controlled environment is maintained at a relative humidity from 0% to 30%.11. The method of claim 1 , wherein the charging comprises ...

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Номер записи: 83
22-02-2018 дата публикации

GENERATOR WAVEFORM MEASUREMENT

Номер: US20180052193A1
Автор: Dorn Douglas W., Frampton Isaac
Принадлежит:

A generator waveform is measured using one or more techniques that reduce the computing resources for measuring the generator waveform and the time required for measuring the generator waveform. One example includes a template matching technique that iteratively selects templates to estimate the phase offset of the generator waveform. One example includes a root mean squared value calculated from less than sample time period that is less than one half of a cycle of the generator waveform. A generator controller calculates a command or parameter for the generator based on the estimated phase offset or the root mean squared value. 1. A method for iteratively analyzing operation of a generator , the method comprising:identifying a generator waveform;performing a discrete analysis on the generator waveform;performing a first comparison of a first set of waveform templates to a result of the discrete analysis of the generator waveform;selecting one of the first set of waveform templates based on the first comparison;performing a second comparison of a second set of waveform templates to a result of the discrete analysis of the generator waveform;selecting one of the second set of waveform templates based on the second comparison;identifying a characteristic value for the generator waveform based on the selected one of the second set of waveform templates; andcalculating a generator parameter based on the characteristic value from the selected one of the second set of waveform templates.2. The method of claim 1 , wherein the characteristic value is a phase angle.3. The method of claim 1 , wherein the characteristic value is a first characteristic phase value and the generator waveform is a first generator waveform claim 1 , the method comprising:identifying a second characteristic value for a second generator waveform, wherein the generator parameter is based on a difference between the first characteristic phase value and the second characteristic phase value.4. The ...

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Номер записи: 84
15-05-2014 дата публикации

CURRENT SENSOR

Номер: US20140132247A1
Автор: KIKUCHI Naoto, Seo Yusuke, Takagi Kenichi
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

A current sensor () that is used to detect a current that flows through a bus bar () includes: a base () that is attached to the bus bar (); a magnetic thin film () that is mounted on the base (); a luminescent device that irradiates light to the magnetic thin film (); a photoreceptor device that detects light that is irradiated from the luminescent device to the magnetic thin film () and that is reflected from the magnetic thin film (); a differential amplifier that converts an optical signal, detected by the photoreceptor device, into the current that flows through the bus bar (); and an accommodation member () and pins () that restrict relative rotation of the magnetic thin film () with respect to the bus bar (). 1. A current sensor for detecting a current that flows through a bus bar , comprising:a base provided with the bus bar;a magnetic thin film mounted on the base;a luminescent device configured to irradiate light to the magnetic thin film;a photoreceptor device configured to detect light that is irradiated from the luminescent device to the magnetic thin film and that is reflected from the magnetic thin film;a computing device configured to convert an optical signal, detected by the photoreceptor device, into the current that flows through the bus bar; anda rotation restricting portion configured to restrict relative rotation of the magnetic thin film with respect to the bus bar.2. The current sensor according to claim 1 , whereinthe rotation restricting portion includes a mounting position restricting portion that restricts a mounting position of the magnetic thin film on the base and a base fixing portion that restricts relative rotation of the base with respect to the bus bar.3. The current sensor according to claim 2 , whereinthe mounting position restricting portion has a wall portion that surrounds the magnetic thin film.4. The current sensor according to claim 2 , whereinthe mounting position restricting portion has an accommodation hole to which ...

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Номер записи: 85
15-05-2014 дата публикации

MIXED CURRENT SENSOR AND METHOD FOR FITTING SAID SENSOR

Номер: US20140132249A1
Автор: LOGLISCI David
Принадлежит: Schneider Electric Industries SAS

The invention relates to a mixed current sensor comprising in a case: 2. The mixed current sensor according to claim 1 , wherein the first coil of the current measurement device is wound on an insulating shell comprising clip-fastening means designed to collaborate with the first linking means of the linking cassette.3. The mixed current sensor according to claim 2 , wherein the clip-fastening means of the shell and the first linking means of the linking cassette form a tenon and mortar system.4. The mixed current sensor according to claim 1 , wherein the second linking means of the first linking cassette comprise a positioning slide salient with respect to the body of said linking cassette claim 1 , said positioning slide being designed to be housed in a groove of a housing of the case to form a tenon and mortar system.5. The mixed current sensor according to claim 1 , wherein the assembly formed by the second coil and the magnetic circuit is fixed onto an insulating support plate claim 1 , the second linking cassette being secured to the insulating support plate.6. The mixed current sensor according to claim 5 , wherein the third linking means of the second linking cassette comprise a positioning slide salient with respect to the body of the second linking cassette claim 5 , said positioning slide being designed to be housed in the same groove as the positioning slide of the first linking cassette to form a tenon and mortar system.7. The mixed current sensor according to claim 6 , wherein the grooves of the housing comprise stop means designed to collaborate with slides of the second cassette at the end of translational movement of said slides in the housing claim 6 , said stop means being designed to block translational movement of both the first and second cassette.8. The mixed current sensor according to claim 1 , wherein the magnetic current sensor comprises a second coil wound around the magnetic circuit claim 1 , the assembly formed by the second coil and ...

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Номер записи: 86
25-02-2016 дата публикации

METHODS AND APPARATUS FOR COMMUNICATING CURRENT LEVELS WITHIN A LIGHTING APPARATUS INCORPORATING A VOLTAGE CONVERTER

Номер: US20160057832A1
Автор: BRIGGS Gerald Edward, MURRAY Sean MacLean
Принадлежит: ARKALUMEN INC.

Circuits for sensing current levels within an apparatus are disclosed. In specific cases, a constant voltage power supply is used to power an LED lighting apparatus in which there are uncertainties within the forward voltages of the LEDs, which in turn creates uncertainty with respect to the current level flowing through the LEDs. To manage these uncertainties, the current flowing through the LEDs is measured by determining a voltage level across a known resistor and calculating the current level. To prevent the known resistor from causing a significant reduction in the efficiency of the overall light engine, the circuit includes one or more transistors in parallel with the known resistor to reduce the effective resistance in the LED circuit during times that the current is not being sensed. 123-. (canceled)24. A lighting apparatus comprising:a voltage converter operable to receive an input voltage and generate an output voltage defined between a high voltage rail and a low voltage rail;at least one Light Emitting Diode (LED) and a switching element coupled in series between the high voltage rail and the low voltage rail;a controller operable to control the switching element to cause the LED to generate a light output that comprises a modulated signal that includes information related to the lighting apparatus.25. The lighting apparatus according to claim 24 , wherein the controller is operable to control the voltage converter to set a current level flowing from the high voltage rail to the low voltage rail through the LED and the information related to the lighting apparatus comprises an indication of the current level flowing through the LED.26. The lighting apparatus according to claim 24 , wherein the controller is operable to determine an operating state of the LED and the information related to the lighting apparatus comprises an indication of the operating state of the LED.27. The lighting apparatus according to claim 26 , wherein claim 26 , to determine the ...

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Номер записи: 87
13-02-2020 дата публикации

SOFT-START CIRCUIT AND BUCK CONVERTER COMPRISING THE SAME

Номер: US20200052592A1
Автор: CHUNG Bonggeun, JIN Chenghao, KOO Gwanbon, MOON SangCheol
Принадлежит: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC

A buck converter includes a power switch having a first end to receive an input voltage, and a soft start circuit configured to compensate a soft start voltage during a soft start time period according to a result of comparing a feedback voltage corresponding to an output voltage of the buck converter and an input detection voltage corresponding to the input voltage. The buck converter controls switching of the power switch using the soft start voltage. 1. A method of controlling a power switch in a converter circuit , the method comprising: comparing a feedback voltage corresponding to an output voltage of an output terminal of the converter circuit to an input detection voltage corresponding to an input voltage of an input terminal of the converter circuit,', 'causing the soft start voltage to increase at a first slope in response to the feedback voltage being lower than the input detection voltage,', 'causing the soft start voltage to change according to a second slope different from the first slope in response to the feedback voltage being higher than the input detection voltage, and', 'controlling switching of the power switch using the soft start voltage and the feedback voltage,, 'during a soft start time periodwherein the power switch is coupled to an inductor between the input terminal of the converter circuit and the output terminal of the converter circuit,wherein the input voltage is an Alternating Current (AC) voltage, andwherein the input detection voltage is a rectified AC voltage.2. The method of claim 1 , further comprising decreasing the soft start voltage during the soft start time period when the feedback voltage is higher than the input detection voltage.3. The method of claim 2 , further comprising:comparing the feedback voltage and the input detection voltage;switching a first transistor according to a result of comparing the feedback voltage and the input detection voltage, the first transistor having a first end coupled to a capacitor by ...

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Номер записи: 88
05-03-2015 дата публикации

CURRENT MEASUREMENT DEVICE AND CURRENT MEASUREMENT METHOD

Номер: US20150061642A1
Автор: TSUBATA Hiroyuki
Принадлежит:

A current measurement device measures current flowing in a composite material M containing conductive fibers. The current measurement device includes a temperature measuring unit that measures the temperature of a surface of the composite material, upon flow of current in the composite material; a storage unit that stores conversion data that is acquired as a result of a conversion data acquisition test performed beforehand and that results from converting the temperature of the surface of the composite material to the value of the current flowing in the composite material; and a current calculator that, on the basis of the conversion data stored in the storage unit, converts the temperature of the surface of the composite material M as measured by the temperature measuring unit to a value of the current flowing in the composite material. 1. A current measurement device for measuring current flowing in a composite material containing conductive fibers , the current measurement device comprising:a temperature measuring unit that measures the temperature of a surface of the composite material, upon flow of current in the composite material;a storage unit that stores conversion data that is acquired through a preliminary test carried out beforehand and that results from converting the temperature of the composite material surface to a value of current flowing in the composite material; anda current calculator that, on the basis of the conversion data stored in the storage unit, converts the temperature of the composite material surface, as measured by the temperature measuring unit, to a value of current flowing in the composite material.2. The current measurement device according to claim 1 , whereinthe composite material is a laminate resulting from layering a plurality of fiber layers including fiber layers having mutually dissimilar fiber directions, the laminate being penetrated by fasteners of fastening pieces; andthe temperature measuring unit measures the ...

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Номер записи: 89
05-03-2015 дата публикации

SENSOR DEVICE

Номер: US20150061645A1
Автор: Hashimoto Takasuke, NAKASHIBA Yasutaka, NEMOTO Takatsugu, Uchida Shinichi
Принадлежит:

This invention provides a sensor device at reduced cost. The sensor device includes a printed circuit board, a first terminal, a second terminal, an interconnect line, and a semiconductor device. The first terminal and second terminal are provided on the printed circuit board and coupled to a power line. The second terminal is coupled to a downstream part of the power line with respect to the first terminal. The interconnect line is disposed on the printed circuit board to couple the first terminal and second terminal to each other. In other words, the interconnect line is coupled to the power line in parallel. The semiconductor device is mounted on the printed circuit board and includes an interconnect layer and an inductor formed in the interconnect layer. 1. A sensor device comprising:a circuit board;a first terminal provided on the circuit board and coupled to a power line;a second terminal provided on the circuit board and coupled to a downstream part of the power line with respect to the first terminal;an interconnect line provided on the circuit board, coupling the first terminal and the second terminal to each other, and arranged electrically in parallel with the power line; anda semiconductor device mounted on the circuit board and having an inductor.2. The sensor device according to claim 1 ,wherein the semiconductor device has two inductors, andwherein at least a part of the interconnect line extends between the two inductors as viewed in a direction perpendicular to the semiconductor device.3. The sensor device according to claim 2 ,wherein as viewed in a direction perpendicular to the semiconductor device, the interconnect line includes:a first part extending between the two inductors;a second part coupled to one end of the first part and surrounding at least a part of a first of the inductors; anda third part coupled to the other end of the first part and surrounding at least a part of a second of the inductors.4. A sensor device comprising:a circuit ...

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Номер записи: 90
05-03-2015 дата публикации

APPARATUS AND METHOD

Номер: US20150061693A1
Автор: Knudson Orlin B., Pierpont Daniel M., Poch James F.
Принадлежит:

Apparatus and method for assessing the quality of membrane electrode assemblies. 1. An apparatus comprising:first and second aligned roller pairs each having a nip between the rollers of a pair of rollers, wherein each of the first and second roller pairs have parallel axes of rotation, wherein each of the first and second roller pairs is configured to electrically excite a portion of a web passed through the nip and to measure an electrical property of the excited web, wherein the first and second roller pairs are configured to electrically excite a portion of the web passed through the nip are configured to provide a line of charge parallel to the axes of rotation of the respective roller pairs, and wherein the rollers are each electrically insulated from each other and from the apparatus; anda processing unit configured to at least analyze the measured electrical properties.2. (canceled)3. The apparatus of claim 1 , wherein the electrical property measured is an array of values.4. The apparatus of claim 1 , wherein the electrical property measured is at least one of voltage or current.59.-. (canceled)11. (canceled)12. The method of claim 10 , wherein the first electrical figure of merit is an array of values determined during the first period of time claim 10 , and wherein the second electrical figure of merit electrical figure of merit is an array of values determined during the second period of time.13. The method of claim 10 , wherein the first electrical figure of merit is at least one of voltage or current and the second electrical figure of merit is at least one of voltage or current.1416.-. (canceled)17. The apparatus of claim 1 , wherein the line of charge parallel to the axes of rotation of the respective roller pairs independently have a length of at least 15 cm.18. The apparatus of claim 1 , wherein the electrical property measured is voltage.19. The apparatus of claim 1 , wherein the electrical property measured is current.20. The method of claim 10 , ...

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Номер записи: 91
10-03-2022 дата публикации

CURRENT PEAK SENSOR FOR PULSED LASER DIODE ARRAY

Номер: US20220074975A1
Автор: Akbari-Dilmaghani Rahim
Принадлежит: ams AG

An apparatus and method for current peak detection. The apparatus includes a pulse laser diode array, a sense resistor, a capacitive voltage divider (CVD) electrically coupled to the pulse laser diode array, a first current rectifier, a second current rectifier, a first current peak detector, a second current peak detector, an analog-to-digital converter (ADC) operable to convert the analog outputs from each current peak detector to a digital output signal, and a digital signal processing (DSP) unit operable to detect, from the digital output signal, a current peak pulse at the top and the bottom of the sense resistor. 1. An apparatus , comprising:a pulse laser diode array;a sense resistor operable to traverse pulsed laser current to the pulse laser diode array;{'claim-text': ['a first input node for receiving a direct current (DC) input voltage, wherein a top end of the sense resistor is electrically coupled to the first input node;', 'a second input node for receiving a pulsed laser current generated by the pulse laser diode array, wherein a bottom end of the sense resistor is electrically coupled to the second input node; and', 'a first and a second output node that each respectively output a scaled DC output voltage;'], '#text': 'a capacitive voltage divider (CVD) electrically coupled to the pulse laser diode array and comprising:'}a first current rectifier electrically coupled to the first output node of the CVD;a second current rectifier electrically coupled to the second output node of the CVD;a first current peak detector electrically coupled to an output of the first current rectifier;a second current peak detector electrically coupled to an output of the second current rectifier;an analog-to-digital converter (ADC) electrically coupled to an output of the first current peak detector and an output of the second current peak detector and operable to convert the analog outputs from each current peak detector to a digital output signal; anda digital signal ...

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Номер записи: 92
21-02-2019 дата публикации

IMAGE CAPILLARY ISOELECTRIC FOCUSING TO ANALYZE PROTEIN VARIANTS IN A SAMPLE MATRIX

Номер: US20190056350A1
Автор: BIGWARFE Paul, Cui Peng, LASTRO Michele, Lu Kun, Ma Junyu, RAMBHADRAN Anu, RYAN Clare
Принадлежит:

Embodiments of the present disclosure are directed to methods, systems, devices and kits corresponding to a method for analyzing charge variants of a protein such as vascular endothelial growth factor VEGF-Trap. 1. A method for analyzing charge variants of vascular endothelial growth factor VEGF-Trap comprising:loading a protein sample onto a separation capillary comprising a mixture of at least a carrier ampholyte, methylcellulose, and a stabilizing additive;applying a first voltage for a first predetermined period of time such that the carrier ampholyte forms a pH gradient within the capillary;applying a second voltage for a second predetermined period of time to focus the migration of charge variants of the protein within the capillary such that the overall charge of the variants is neutral; anddetecting and quantifying charge variants of the protein.2. The method of claim 1 , wherein: measuring the absorbance for a plurality of charge variant isoforms;', 'segregating the plurality of charge variant isoforms into isolated regions comprising at least a first acid/acidic region (R1), a second neutral region (R2), and a third base/basic region (R3); and', 'determining a percentage of charge variant isoforms falling within in each of regions R1, R2 and R3., 'detecting and quantifying charge variants comprises3. The method of claim 1 , wherein both detecting and quantifying of charge variants are performed.4. The method of claim 1 , wherein detection of charge variants occurs at a wavelength of approximately 280 nm.5. The method of claim 1 , wherein the concentration of protein loaded onto the capillary tube is approximately 2.0 mg/ml.6. The method of claim 1 , wherein stabilizing additive comprises urea.7. The method of claim 5 , wherein the amount of urea in the mixture comprises approximately 2 M.8. The method of claim 1 , wherein the mixture includes approximately 0.35% methylcellulose.9. The method of claim 1 , wherein the first voltage comprises 1500 V.10. The ...

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Номер записи: 93
21-02-2019 дата публикации

RFID BASED ENERGY MONITORING DEVICE

Номер: US20190056432A1
Автор: FORSTER Ian J.
Принадлежит:

A device configured to fit between an electric plug and an electric wall outlet for monitoring the energy consumption of an electrically powered device such as an appliance. The monitoring device enables energy consumption to be measured over time and reported to an RFID reader without the need to interrupt the power supply to the device being monitored. The monitoring device comprises a detection circuit coupled to a transmission system attached to a thin, planar base. A field powering element within the detection circuit is used to achieve electric field powering of the monitoring device. 1. An electrical current monitoring device comprising:a base;a transmission system attached to the base; anda detection circuit in communication with the transmission system.2. The electrical current monitoring device of claim 1 , wherein the electrical current monitoring device is adapted to be positioned between a plug and a wall outlet.3. The electrical current monitoring device of claim 1 , wherein the transmission system is a RFID device.4. The electrical current monitoring device of claim 3 , wherein the RFID device comprises a RFID chip and at least one antenna.5. The electrical current monitoring device of claim 1 , wherein the transmission system is embedded within the base.6. The electrical current monitoring device of claim 1 , wherein the base comprises a pair of apertures for accepting a pair of pins from a plug.7. The electrical current monitoring device of claim 1 , wherein the detection circuit comprises a field powering element for powering the electrical current monitoring device.8. The electrical current monitoring device of claim 1 , wherein the electrical current monitoring device achieves electric field powering via capacitance.9. The electrical current monitoring device of claim 1 , wherein the electrical current monitoring device achieves electric field powering via resistance.10. The electrical current monitoring device of claim 1 , wherein the detection ...

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Номер записи: 94
02-03-2017 дата публикации

BHF SOLUTION CONCENTRATION MEASUREMENT DEVICE AND BHF SOLUTION CONCENTRATION MEASUREMENT METHOD

Номер: US20170059524A1
Автор: TAKAGI So
Принадлежит:

In order to make it possible to accurately measure the HF concentration in a BHF solution in a low concentration region using a simple structure, there are provided a relationship storage unit that stores relationships between a pH of a BHF solution and an HF concentration, a pH meter that measures the pH of the BHF solution, and a concentration calculation unit that refers to relationships stored in the relationship storage unit, and calculates the HF concentration from the pH values measured by the pH meter. 1. A BHF solution concentration measurement device that measures an HF concentration in a BHF solution , comprising:a relationship storage unit that stores relationships between a pH of a BHF solution and an HF concentration;a pH meter that measures the pH of the BHF solution; anda concentration calculation unit that refers to the relationships stored in the relationship storage unit, and calculates the HF concentration from the pH values measured by the pH meter.2. The BHF solution concentration measurement device according to claim 1 , wherein the relationship storage unit stores relationships between the pH and the HF concentration for each one of a plurality of different NHF concentrations claim 1 , and{'sub': '4', 'the concentration calculation unit refers to the relationship corresponding to a given NHF concentration, and calculates the HF concentration from the value of the pH measured by the pH measurement unit.'}3. The BHF solution concentration measurement device according to claim 1 , wherein the pH meter uses a glass electrode.4. The BHF solution concentration measurement device according to claim 3 , wherein the pH meter further comprises:a body that stores an internal liquid; anda tube that is formed either partially or wholly from response glass, and through which the BHF solution flows, and whereinthe tube penetrates the body such that the response glass forming the tube is in contact with the internal liquid inside the body.5. The BHF solution ...

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Номер записи: 95
10-03-2022 дата публикации

STARTUP CONTROL METHOD AND SYSTEM, AND VOLTAGE SPIKE MEASUREMENT CIRCUIT AND METHOD

Номер: US20220077767A1
Автор: LIN Jianpeng, SUN Hao, Wang Xiaolei, WU Haixin, Zhu Peng
Принадлежит:

A startup control method for a DC/DC converter is used for starting the DC/DC converter with energy transferred from a low-voltage side to a high-voltage side, and includes: determining a duty cycle or a frequency of a driving signal based on at least a voltage spike reference value and a voltage spike measurement value of a power switch at the low-voltage side; and outputting the driving signal to the power switch, thereby controlling the on and off of the power switch. The startup control method for a DC/DC converter of the disclosure can improve a reverse charging power of the converter to the maximum extent and reduce the time needed for charging a bus capacitor during a reverse startup process while ensuring voltage stress on the power switch not to exceed a limit. 1. A startup control method for a DC/DC converter , which is applied to a startup process of the DC/DC converter with energy transferred from a low-voltage side to a high-voltage side , comprising:determining a duty cycle or a frequency of a driving signal according to at least a voltage spike reference value and a voltage spike measurement value of a power switch at the low-voltage side; andoutputting the driving signal to the power switch, thereby controlling on and off of the power switch.2. The startup control method according to claim 1 , wherein the voltage spike reference value comprises a first threshold and a second threshold smaller than the first threshold claim 1 , andwherein when the voltage spike measurement value is greater than or equal to the first threshold, the duty cycle of the driving signal is regulated to decrease, and when the voltage spike measurement value is less than or equal to the second threshold, the duty cycle of the driving signal is regulated to increase.3. The startup control method according to claim 1 , comprising:comparing the voltage spike measurement value with the voltage spike reference value to obtain a voltage error;regulating the duty cycle of the driving ...

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Номер записи: 96
21-02-2019 дата публикации

Valley and peak detection for switching power converter

Номер: US20190058450A1
Автор: Chuanyang Wang, Henry Jun
Принадлежит: Dialog Semiconductor Inc

A switching power converter is provided with a phase-shifting RC network for phase-shifting a divided version of a drain voltage of a power switch transistor into a phase-shifted voltage. A comparator compares the phase-shifted voltage to a DC bias voltage to detect peaks and valleys during resonant oscillations of the drain voltage of the power switch transistor.

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Номер записи: 97
22-05-2014 дата публикации

CURRENT DETECTOR

Номер: US20140139203A1
Автор: Hozumi Yuya, Nishimura Keisuke, SAHA Subrata
Принадлежит: AISIN AW CO., LTD.

A current detector that detects, based on output signals of N coreless current sensors, where N is a natural number of 3 or more, currents flowing in N conductors in a circuit connected so that the sum of the currents flowing in the N conductors becomes zero. The current detector has a signal-current correlation acquiring section that acquires a signal-current correlation representing a correlation between the output signals of the N coreless current sensors and the currents flowing in the N conductors. Furthermore, a current calculating section that calculates the currents flowing in the N conductors based on the output signals of all the N coreless current sensors by using the signal-current correlation. 1. A current detector that detects , based on output signals of N coreless current sensors (where N is a natural number of 3 or more) , currents flowing in N conductors in a circuit connected so that the sum of the currents flowing in the N conductors becomes zero , comprising:a signal-current correlation acquiring section that acquires a signal-current correlation representing a correlation between the output signals of the N coreless current sensors and the currents flowing in the N conductors; anda current calculating section that calculates the currents flowing in the N conductors based on the output signals of all the N coreless current sensors by using the signal-current correlation.2. The current detector according to claim 1 , whereinthe signal-current correlation is a correlation in which a relational expression that calculates the current flowing in one of the conductors by multiplying each of the output signals of the N coreless current sensors by a corresponding one of N signal sensitivity coefficients preset to a value other than zero is set for each of the N conductors.3. The current detector according to claim 2 , whereinthe signal-current correlation is inverse characteristics of a current-signal correlation as a correlation in which a relational ...

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Номер записи: 98
03-03-2016 дата публикации

CHARGING CIRCUIT, CONTROL CHIP AND CONTROL METHOD THEREOF

Номер: US20160064981A1
Автор: Li Cheng-Tao
Принадлежит:

A charging circuit including a transformer, a storage element, a switch element, a first resistor, and a current detection unit is provided. The transformer includes a primary coil and a secondary coil. The storage element is coupled to the secondary coil. The switch element is coupled to the primary coil. The first resistor is coupled to the primary coil. The current detection unit detects current flowing through the first resistor. When the current reaches a set current, the current detection unit sends a full signal to de-activate the switch unit. 1. A charging circuit , comprising:a transformer comprising a primary coil and a secondary coil;a storage element coupled to the secondary coil;a switch element coupled to the primary coil;a first resistor coupled to the primary coil; anda current detection unit detecting a current flowing through the first resistor, wherein when the current reaches a set current, the current detection unit sends a full signal to de-activate the switch unit.2. The charging circuit as claimed in claim 1 , further comprising:a control unit configured to de-activate the switch unit according to the full signal, wherein when the control unit receives a charging signal, the control unit activates the switch unit.3. The charging circuit as claimed in claim 2 , wherein the control unit comprises:an SR flip-flop comprising a set terminal receiving an enable signal, a reset terminal receiving a disable signal, and an output terminal; anda transmitter coupled between the output terminal and the switch unit and controlling the switch unit according to the full signal and the charging signal.4. The charging circuit as claimed in claim 1 , further comprising:a turn-on unit processing a voltage of the primary coil to generate a processed result and sending an enable signal according to the processed result to activate the switch unit.5. The charging circuit as claimed in claim 4 , wherein the turn-on unit comprises:a second resistor coupled to the ...

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Номер записи: 99
03-03-2016 дата публикации

MULTI-LEVEL PULSE GENERATOR CIRCUITRY

Номер: US20160065187A1
Автор: Candage Anthony B., Krishnamoorthy Aswath Krishnan
Принадлежит:

During operation, a supply voltage and the reference voltage power a novel multi-level pulse generator circuit. The multi-level pulse generator circuit generates voltage pulses of varying magnitude from a respective output port. For example, the multi-level pulse generator circuit produces respective pulses to have magnitudes that fall inside and outside of a range defined by the supply voltage and the reference voltage. Expansion of the pulse magnitudes to be outside of the range as defined by the supply voltage and the reference voltage increases noise immunity and therefore enables a respective transmitter to transmit data at higher bandwidth. The multi-level pulse generator circuit can be fabricated using a set of multiple transistors of only a single type in which each of the multiple transistors in the set has a corresponding oxide breakdown voltage that is substantially less than the respective magnitude that falls outside of the range. 1. An apparatus comprising:a first input to receive a supply voltage;a second input to receive a reference voltage with respect to the supply voltage;an output port; anda multi-level pulse generator circuit, the multi-level pulse generator circuit powered by the supply voltage and the reference voltage, the multi-level pulse generator circuit generating voltage pulses from the output port, at least one of the generated voltage pulses having a respective magnitude of which falls outside a range defined by the supply voltage and the reference voltage.2. The apparatus as in claim 1 , wherein the multi-level pulse generator circuit is fabricated using a set of multiple transistors of only a single type claim 1 , each of the multiple transistors in the set having a corresponding oxide layer breakdown voltage that is substantially less than the respective magnitude that falls outside of the range.3. The apparatus as in claim 2 , wherein the multi-level pulse generator circuit includes a voltage level converter circuit that converts ...

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Номер записи: 100