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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 21369. Отображено 100.

05-01-2012 дата публикации

Hall sensor

Номер: US20120001280A1

Автор: Takaaki Hioka, Toshihiko Omi

Принадлежит: Seiko Instruments Inc

Provided is a highly-sensitive Hall element capable of eliminating an offset voltage without increasing the chip size. The Hall element includes: a Hall sensing portion having a shape of a cross and four convex portions; Hall voltage output terminals which are arranged at the centers of the front edges of the four convex portions, respectively; and control current input terminals which are arranged on side surfaces of each of the convex portions independently of the Hall voltage output terminals. In this case, the Hall voltage output terminal has a small width and the control current input terminal has a large width.

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Номер записи: 1

03-12-2021 дата публикации

Устройство для диагностики магнитной силы на разных расстояниях от полюсной поверхности

Номер: RU0000208114U1

Автор: Александр Васильевич Сандуляк, Алексей Сергеевич Харин, Анна Александровна Сандуляк, Дарья Александровна Сандуляк, Мария Николаевна Полисмакова

Принадлежит: Федеральное государственное бюджетное образовательное учреждение высшего образования «МИРЭА Российский технологический университет»

Полезная модель относится к измерительной технике и предназначена для диагностики магнитной силы на разном расстоянии от полюсных поверхностей намагниченных тел: постоянных магнитов, магнитных сердечников, рабочих элементов аппаратов магнитного разделения материалов и пр. Включает принудительно перемещаемое по отношению к диагностируемой полюсной поверхности и взаимодействующее с ним посредством магнитного поля контрольное ферромагнитное тело, неферромагнитный держатель, систему его перемещения, а также измеритель силы. При этом система перемещения держателя выполнена с возможностью осуществления его непрерывного перемещения посредством использования, например, синхронного бесщёточного электродвигателя, а держатель содержит тензодатчик диагностируемой силы для фиксации усилия на изгиб или сжатие, растяжение. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 208 114 U1 (51) МПК G01R 33/02 (2006.01) B03C 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (52) СПК G01R 33/02 (2021.08) (21)(22) Заявка: 2021119525, 02.07.2021 (24) Дата начала отсчета срока действия патента: Дата регистрации: 03.12.2021 (45) Опубликовано: 03.12.2021 Бюл. № 34 (54) Устройство для диагностики магнитной силы на разных расстояниях от полюсной поверхности (57) Реферат: Полезная модель относится к измерительной магнитного поля контрольное ферромагнитное технике и предназначена для диагностики тело, неферромагнитный держатель, систему его магнитной силы на разном расстоянии от перемещения, а также измеритель силы. При этом полюсных поверхностей намагниченных тел: система перемещения держателя выполнена с постоянных магнитов, магнитных сердечников, возможностью осуществления его непрерывного рабочих элементов аппаратов магнитного перемещения посредством использования, разделения материалов и пр. Включает например, синхронного бесщёточного принудительно перемещаемое по отношению к электродвигателя, а держатель содержит диагностируемой полюсной ...

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Номер записи: 2

12-01-2012 дата публикации

Fiber current sensor with reduced temperature sensitivity

Номер: US20120007584A1

Автор: Glen A. Sanders

Принадлежит: Honeywell International Inc

A sensor head assembly is provided, comprising a quarter wave device having shape-induced-birefringence and a sensing coil coupled to the quarter wave device and operable to wind around a current conductor. The quarter wave device converts linearly polarized light from a polarization maintaining fiber to circularly polarized light.

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Номер записи: 3

12-01-2012 дата публикации

Position detecting apparatus

Номер: US20120007589A1

Автор: Ichiro Okada

Принадлежит: Asahi Kasei Microdevices Corp

The present invention provides a single component implementing highly precise pulse detection for rotational or liner position detecting apparatuses for jog dials and mechanical products. Focusing on the fact that the phase difference between the magnetic fields in circumferential and radial directions generated by a magnetized ring is precisely 90 degrees, a position detecting apparatus of the present invention includes two Hall elements placed at a distance; a protective film provided on magnetic sensitive portions of the two Hall elements to cover the magnetic sensitive portions; a thin-film magnetic plate placed on the protective film to cover the magnetic sensitive portions of the two Hall elements; and further a processing circuit calculating the sum and difference of the signals from the two Hall elements to generate signals having an accurate phase difference of 90 degrees. The position detecting apparatus can therefore detect the rotation direction and precise rotation angle.

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Номер записи: 4

19-01-2012 дата публикации

Two-terminal linear sensor

Номер: US20120013327A1

Автор: Jonathan Lamarre, Michael C. Doogue, Monica J. Thomas

Принадлежит: Allegro Microsystems LLC

A magnetic field sensor includes a linear magnetic field sensor to produce a voltage proportional to a sensed magnetic field and an interface having only two terminals for external connections. The two terminals of the interface include a power supply terminal and a ground terminal. The interface includes a voltage-controlled current generating device that is connected between the two terminals and is controlled by the voltage to provide a current signal that is proportional to the sensed magnetic field.

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Номер записи: 5

26-01-2012 дата публикации

Eddy current detection

Номер: US20120019236A1

Автор: Evan Weststrate, Mark Steinback, Noa M. Rensing, Timothy C. Tiernan

Принадлежит: Radiation Monitoring Devices Inc

Eddy current detection probes and related methods are disclosed. In some embodiments, the eddy current detection probes are hybrid probes, including a solid state sensor and a detection loop. In some embodiments, the eddy current detection probes include a drive coil and a detection loop, with the detection loop having a sensitive axis that is not parallel to principal axis of the drive coil. In some such embodiments, the sensitive axis of the detection loop is perpendicular to the principal axis of the drive coil.

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Номер записи: 6

02-02-2012 дата публикации

Magnetoresistive sensor

Номер: US20120025819A1

Автор: Andreas Bernardus Maria Jansman, Frederik Willem Maurits Vanhelmont, Jaap Ruigrok, Kim Phan Le, Robert Hendrikus Margaretha VAN VELDHOVEN

Принадлежит: NXP BV

A magnetoresistive sensor comprising first and second magnetoresistive elements is disclosed. Each magnetoresistive element is coupled at a respective first end to a common ground terminal and comprises one or more magnetoresistive segments, each overlying a corresponding segment of an excitation coil. The resistance of the magnetoresistive segments in each of the first and second magnetoresistive elements is the same and the resistance of the segments of the excitation coil corresponding to the first magnetoresistive element is the same as the resistance of the segments of the excitation coil corresponding to the second magnetoresistive element.

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Номер записи: 7

16-02-2012 дата публикации

Automatic determination of the position of an object

Номер: US20120038347A1

Автор: Tilman Bucher

Принадлежит: Cairos Technologies AG

The disclosure relates to a method for analysis of magnetic fields or signals used for the determination of the position of an object, wherein two temporally to each other shifted magnetic signals or fields are generated by two conductors arranged at least in part or completely separated from each other. The magnetic fields generated by the conductors are consecutively being captured by at least one and preferably three sensors arranged orthogonally to each other and determining from the captured signals information for determining the position of the object carrying the sensors relative to the conductors.

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Номер записи: 8

23-02-2012 дата публикации

Magnetic-core polymer-shell nanocomposites with tunable magneto-optical and/or optical properties

Номер: US20120043495A1

Автор: Alejandra Lopez-Santiago, Palash Gangopadhyay, Robert A. Norwood

Принадлежит: Arizona Board of Regents of University of Arizona

Methods are disclosed for synthesizing nanocomposite materials including ferromagnetic nanoparticles with polymer shells formed by controlled surface polymerization. The polymer shells prevent the nanoparticles from forming agglomerates and preserve the size dispersion of the nanoparticles. The nanocomposite particles can be further networked in suitable polymer hosts to tune mechanical, optical, and thermal properties of the final composite polymer system. An exemplary method includes forming a polymer shell on a nanoparticle surface by adding molecules of at least one monomer and optionally of at least one tethering agent to the nanoparticles, and then exposing to electromagnetic radiation at a wavelength selected to induce bonding between the nanoparticle and the molecules, to form a polymer shell bonded to the particle and optionally to a polymer host matrix. The nanocomposite materials can be used in various magneto-optic applications.

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Номер записи: 9

15-03-2012 дата публикации

Magnetic balance type current sensor

Номер: US20120062224A1

Автор: Akira Takahashi, Hideharu Matsuo, Hidekazu Kobayashi, Kenji Ichinohe, Masahiro Iizuka, Masamichi Saito, Naoki Sakatsume, Shigenobu Miyajima, Tatsuya Kogure, Tsuyoshi Nojima, Yoshihiro Nishiyama, Yosuke Ide

Принадлежит: Alps Green Devices Co Ltd

A magnetic balance type current sensor includes a magnetoresistance effect element whose resistance value changes owing to the application of an induction magnetic field from a current to be measured; a feedback coil disposed in the vicinity of the magnetoresistance effect element and generating a cancelling magnetic field cancelling out the induction magnetic field; a magnetic field detection bridge circuit including two outputs causing a voltage difference corresponding to the induction magnetic field to occur; and a magnetic shield attenuating the induction magnetic field and enhancing the cancelling magnetic field, wherein, on the basis of the current flowing through the feedback coil at the time of an equilibrium state in which the induction magnetic field and the cancelling magnetic field are cancelled out, the current to be measured is measured, wherein the feedback coil, the magnetic shield, and the magnetic field detection bridge circuit are formed on a same substrate.

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Номер записи: 10

29-03-2012 дата публикации

Method to measure 3 component of the magnetic field vector at nanometer resolution using scanning hall probe microscopy

Номер: US20120079632A1

Автор: Ahmet Oral, Munir Dede, Rizwan Arkam

Принадлежит: Individual

Scanning hall probe microscopy is used to measure 3 components of the magnetic field vector at nanometer resolution by connecting of Hall probe to the end of the piezo scanner, then gluing of the sample to the sample holder, thereafter positioning of the SHPM head under the optical microscope with approximately X40 magnification, then moving back of the slider puck around approximately 30 steps or moving the sensor or sample back by suffient amount using motors, piezo or other positioner such that signal decays to negligible levels; thereafter setting the temperature of cryostat or to desired temperature, then offset nulling of the Hall sensor in gradiometer or normal conditions, and finally setting of the scan area, speed, resolution and the acquisition channels through SPM control program.

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Номер записи: 11

12-04-2012 дата публикации

Apparatus and Method for Reducing a Transient Signal in a Magnetic Field Sensor

Номер: US20120086444A1

Автор: Michael G. Ward, Weihua Chen

Принадлежит: Allegro Microsystems LLC

A magnetic field sensor includes a compensation loop coupled in series with normal circuit couplings in order to reduce a transient signal that would otherwise be generated when the magnetic field sensor experiences a high rate of change of magnetic field. In some embodiments, the magnetic field sensor is a current sensor responsive to a magnetic field generated by a current-carrying conductor.

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Номер записи: 12

19-04-2012 дата публикации

Integrated apparatus for sensing current

Номер: US20120091994A1

Автор: Dong Ok Han, Kyung Uk Kim

Принадлежит: Samsung Electro Mechanics Co Ltd

There is provided an integrated apparatus for sensing current including: a voltage regulator; a Hall effect device receiving current by the voltage regulator and outputting hall voltage in proportional to strength of a magnetic field; and a coil having one end connected to a first connecting terminal and the other end connected to a second connecting terminal, wound to have a plurality of turns along a circumference of the Hall effect device on the same plane spaced apart by a predetermined distance from the Hall effect device in a direction of the magnetic field, and forming the magnetic field according to current flowing through the first connecting terminal and the second connecting terminal, wherein the Hall effect device and the coil are integrated within one chip. A manufacturing cost of a product may be reduced, simultaneously with sensing the current without loss of the magnetic field according to a distance through the above-mentioned configuration.

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Номер записи: 13

17-05-2012 дата публикации

Rotating field sensor

Номер: US20120119729A1

Автор: Hiraku Hirabayashi, Shunji Saruki, Yosuke KOMASAKI

Принадлежит: TDK Corp

A rotating field sensor includes a first detection circuit that outputs a first signal indicating the intensity of a component of a rotating magnetic field in a first direction, a second detection circuit that outputs a second signal indicating the intensity of a component of the rotating magnetic field in a second direction, and an arithmetic circuit that calculates a detected angle value based on the first and second signals. Each of the first and second detection circuits includes at least one MR element row. Each MR element row is composed of a plurality of MR elements connected in series. Each MR element has a magnetization pinned layer. The plurality of MR elements forming each MR element row include one or more pairs of MR elements. Magnetization directions of the magnetization pinned layers in two MR elements making up a pair form a predetermined relative angle other than 0° and 180°.

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Номер записи: 14

24-05-2012 дата публикации

Method and apparatus for non-destructive evaluation of materials

Номер: US20120126803A1

Автор: Andrew P. Washabaugh, Christopher Martin, Daivd A. Jablonski, Neil J. Goldfine, Robert Lyons, Zachary Thomas

Принадлежит: Jentek Sensors Inc

Methods and apparatus for characterizing composite materials for manufacturing quality assurance (QA), periodic inspection during the useful life, or for forensic analysis/material testing. System are provided that relate eddy-current sensor responses to the fiber layup of a composite structure, the presence of impact damage on a composite structure with or without a metal liner, volumetric stress within the composite, fiber tow density, and other NDE inspection requirements. Also provided are systems that determine electromagnetic material properties and material dimensions of composite materials from capacitive sensor inspection measurements. These properties are related to the presence of buried defects in non-conductive composite materials, moisture ingress, aging of the material due to service or environmental/thermal exposure, or changes in manufacturing quality.

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Номер записи: 15

24-05-2012 дата публикации

Current Sensor

Номер: US20120126805A1

Автор: Udo Ausserlechner, Wolfgang Scherr

Принадлежит: INFINEON TECHNOLOGIES AG

Embodiments of the invention provide a current sensor including a conductive element and at least two magnetic field sensors. The conductive element includes at least three terminal areas and a common conductive area, wherein each of the at least three terminal areas is connected to the common conductive area to guide a current applied to the respective terminal area into the common conductive area. The at least two magnetic field sensors are arranged at different geometric positions adjacent to the common conductive area, wherein each of the at least two magnetic field sensors is configured to sense a magnetic field component of each current flowing into the common conductive area to provide a sensor signal based on the sensed magnetic field component.

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Номер записи: 16

21-06-2012 дата публикации

Biasing circuit for a magnetic field sensor, and corresponding biasing method

Номер: US20120153937A1

Автор: Carlo Alberto Romani, Enrico Pozzati, Fabio Bottinelli

Принадлежит: STMICROELECTRONICS SRL

Described herein is a biasing circuit for a magnetic-field sensor; the magnetic-field sensor is provided with a first detection structure, which generates a first electrical detection quantity as a function of a first component of an external magnetic field, and a second detection structure, which generates a second electrical detection quantity as a function of a second component of an external magnetic field. The biasing circuit electrically supplies the first detection structure and the second detection structure in respective biasing time intervals, at least partially distinct from one another, which preferably do not temporally overlap one other.

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Номер записи: 17

28-06-2012 дата публикации

Current perpendicular to plane (CPP) magnetoresistive sensor having dual composition hard bias layer

Номер: US20120161263A1

Автор: Alexander M. Zeltser, Stefan Maat

Принадлежит: Individual

A current-perpendicular-to-the-plane (CPP) magnetoresistive (MR) sensor has a dual composition hard bias layer structure that is used to longitudinally bias the sensor's free ferromagnetic layer. The dual composition hard bias layer structure is composed of first layer of CoPt, having high anisotropy compared to the second layer. The second layer, composed of CoFe, has a higher magnetization compared to the first layer. The resulting dual hard bias layer structure exhibits high values of coercivity and squareness while maintaining a reduced sensor thickness compared to sensors of the prior art.

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Номер записи: 18

12-07-2012 дата публикации

Micromachined resonant magnetic field sensors

Номер: US20120176128A1

Автор: Baris CAGDASER, Chiung C. Lo, Derek Shaeffer, Joseph Seeger

Принадлежит: InvenSense Inc

A micromachined magnetic field sensor comprising is disclosed. The micromachined magnetic field comprises a substrate; a drive subsystem, the drive subsystem comprises a plurality of beams, and at least one anchor connected to the substrate; a mechanism for providing an electrical current through the drive subsystem along a first axis; and Lorentz force acting on the drive subsystem along a second axis in response to a magnetic field along a third axis. The micromachined magnetic field sensor also includes a sense subsystem, the sense subsystem comprises a plurality of beams, and at least one anchor connected to the substrate; wherein a portion of the sense subsystem moves along a fourth axis; a coupling spring between the drive subsystem and the sense subsystem which causes motion of the sense subsystem in response to the magnetic field; and a position transducer to detect the motion of the sense subsystem.

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Номер записи: 19

19-07-2012 дата публикации

Method and apparatus for identifying accessaries using non-contact interface

Номер: US20120185071A1

Автор: Hee-Jun KWON

Принадлежит: SAMSUNG ELECTRONICS CO LTD

The present invention relates to non-contact interface and, in a method for identifying peripheral accessories to perform different modes of function, the method comprises determining if a hall switch located at a previously defined location detects a magnetic field and identifying the function mode based on the location of the hall switch that detected the magnetic field.

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Номер записи: 20

02-08-2012 дата публикации

Sensor system and method for use with an automated guided vehicle (agv)

Номер: US20120197477A1

Автор: Dean Colwell

Принадлежит: Fori Automation Inc

A sensor system for use with an automated guided vehicle (AGV) includes a plurality of sensor units electronically coupled to a sensor control module via parallel communications. Each sensor unit may include a sensor array having a plurality of sensor elements, a conditioning circuit having one or more filter/amplifiers, and a conversion circuit. The sensor control module may be configured to communicate with other AGV components via serial communications. The sensor system is capable of obtaining and storing sensor readings with or without associated offset values and can use the sensor readings to determine the center of a magnetic field using methods that require relatively little processing power. A method of calibrating the sensor system may include determining and storing offset values for a plurality of sensor elements and may be performed with the sensor system installed or uninstalled to the AGV.

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Номер записи: 21

16-08-2012 дата публикации

Mems oscillating magnetic sensor and method of making

Номер: US20120206134A1

Автор: Alan Edelstein, Gregory A. Fischer, Jonathan E. Fine

Принадлежит: US Department of Army

A microelectromechanical system (MEMS) device for sensing a magnetic field comprising: a base; a cantilever attached to the base structure at a first end and movable at a second end, the second end oscillating at a predetermined frequency upon application of a current; a magnetic sensor attached to the movable second end; at least one flux concentrator mounted on the base adapted to transfer magnetic flux to the sensor; whereby when the current is applied, the oscillation of the cantilever causes the sensor to oscillate between the lines of flux transferred from the at least one flux concentrator resulting in the shift of the frequency of the sensed magnetic field to the predetermined frequency. The invention further comprises a method of making the MEMS device.

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Номер записи: 22

16-08-2012 дата публикации

Monolithic tri-axis amr sensor and manufacturing method thereof

Номер: US20120206137A1

Автор: Chongwon Byun, Leyue Jiang, YANG Zhao, Yongyao Cai

Принадлежит: Memsic Inc

A monolithic tri-axis anisotropic magnetoresistive (AMR) sensor and the method of manufacturing of the AMR sensor are presented. In one embodiment, the monolithic tri-axis AMR sensor includes (a) a substrate, (b) a first horizontal direction sensor disposed on the substrate, (c) a second horizontal direction sensor disposed on the substrate, (d) a third horizontal direction sensor disposed on the substrate, and (e) a flux concentrator disposed on the third horizontal direction sensor, wherein the flux concentrator is in cooperation with the third horizontal direction sensor to realize a function of a Z-axis sensor, such that the Z-axis direction can be effectively measured. The integration of the tri-axis AMR sensor is therefore accomplished. In addition, the integrated tri-axis AMR sensor has low production cost and improved reliability.

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Номер записи: 23

23-08-2012 дата публикации

Apparatus and method for sequentially resetting elements of a magnetic sensor array

Номер: US20120212217A1

Автор: Bradley Engel, Phillip MATHER

Принадлежит: Everspin Technologies Inc

A semiconductor process and apparatus provide a high-performance magnetic field sensor with three differential sensor configurations which require only two distinct pinning axes, where each differential sensor is formed from a Wheatstone bridge structure with four unshielded magnetic tunnel junction sensor arrays, each of which includes a magnetic field pulse generator for selectively applying a field pulse to stabilize or restore the easy axis magnetization of the sense layers to orient the magnetization in the correct configuration. prior to measurements of small magnetic fields. The field pulse is sequentially applied to groups of the sense layers of the Wheatstone bridge structures, thereby allowing for a higher current pulse or larger sensor array size for maximal signal to noise ratio.

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Номер записи: 24

30-08-2012 дата публикации

Magnetic tunnel junction having coherent tunneling structure

Номер: US20120217598A1

Автор: Konstantin Nikolaev, Taras Pokhil, Victor Sapazhnikov, Xilin Peng, Yonghua Chen

Принадлежит: SEAGATE TECHNOLOGY LLC

A magnetic tunnel junction includes an amorphous ferromagnetic reference layer having a first reference layer side and an opposing second reference layer side. The first reference layer side has a greater concentration of boron than the second reference layer side. A magnesium oxide tunnel barrier layer is disposed on the second side of the amorphous ferromagnetic reference layer. The magnesium oxide tunnel barrier layer has a crystal structure. An amorphous ferromagnetic free layer is disposed on the magnesium oxide tunnel barrier layer.

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Номер записи: 25

06-09-2012 дата публикации

Multiple dimension position sensor

Номер: US20120223597A1

Автор: Alexander Krupyshev, Christopher Hofmeister, John F. Zettler, Krzystof Majczak, Martin Hosek, Sergei Syssoev

Принадлежит: Brooks Automation Inc

An apparatus including a controller, a workpiece transport in communication with the controller having a movable portion and a transport path, and a multi-dimensional position measurement device including at least one field generating platen attached to the movable portion and at least one sensor group positioned along the transport path and in communication with the controller, the field generating platen is configured for position measurement and propelling the movable portion, each sensor in the at least one sensor group is configured to provide but one output signal along a single axis corresponding to a sensed field generated by the at least one field generating platen and the controller is configured calculate a multi-dimensional position of the movable portion based on the but one output signal of at least one of the sensors in the at least one sensor group, the multi-dimensional position including a planar position and a gap measurement.

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Номер записи: 26

20-09-2012 дата публикации

Magnet Strength Measurement

Номер: US20120234109A1

Автор: Christopher M.S. Sears

Принадлежит: KLA Tencor Corp

An apparatus for determining an integral strength of a magnet, including a magnetically attractive specimen, a force-sensing device for receiving the specimen and determining a magnitude of a first force applied by the specimen against the force-sensing device in the presence of the magnet and a magnitude of a second force applied by the specimen against the force-sensing device in the absence of the magnet, and a platform for receiving the magnet and for positioning the magnet at a desired distance above the specimen.

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Номер записи: 27

27-09-2012 дата публикации

Vertical hall sensor and method for producing a vertical hall sensor

Номер: US20120241887A1

Автор: Christian Schott, Peter Hofmann

Принадлежит: MELEXIS TECHNOLOGIES NV, X Fab Semiconductor Foundries GmbH

The invention relates to a vertical Hall sensor integrated in a semiconductor chip and a method for the production thereof. The vertical Hall sensor has an electrically conductive well of a first conductivity type, which is embedded in an electrically conductive region of a second conductivity type. The electrical contacts are arranged along a straight line on a planar surface of the electrically conductive well. The electrically conductive well is generated by means of high-energy ion implantation and subsequent heating, so that it has a doping profile which either has a maximum which is located at a depth T 1 from the planar surface of the electrically conductive well, or is essentially constant up to a depth T 2 .

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Номер записи: 28

04-10-2012 дата публикации

Stram with compensation element and method of making the same

Номер: US20120248558A1

Автор: Haiwen Xi, Kaizhong Gao, Olle Heinonen, Wenzhong Zhu

Принадлежит: SEAGATE TECHNOLOGY LLC

A spin-transfer torque memory unit includes a free magnetic layer having a magnetic easy axis; a reference magnetic element having a magnetization orientation that is pinned in a reference direction; an electrically insulating and non-magnetic tunneling barrier layer separating the free magnetic layer from the magnetic reference element; and a compensation element adjacent to the free magnetic layer. The compensation element applies a bias field on the magnetization orientation of the free magnetic layer. The bias field is formed of a first vector component parallel to the easy axis of the free magnetic layer and a second vector component orthogonal to the easy axis of the free magnetic layer. The bias field reduces a write current magnitude required to switch the direction of the magnetization orientation of the free magnetic layer.

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Номер записи: 29

04-10-2012 дата публикации

Magnetic head including side shield layers on both sides of a mr element

Номер: US20120250189A1

Автор: Kenzo Makino, Naomichi Degawa, Satoshi Miura, Shohei Kawasaki, Takahiko Machita, Takekazu Yamane, Takumi YANAGISAWA, Yoshikazu Sawada

Принадлежит: TDK Corp

A magnetic head that reads information of a magnetic recording medium is provided. The magnetic head according to one embodiment includes: an MR element, formed with multilayer films, of which an electrical resistance changes according to an external magnetic field; a first shield layer that is disposed on a lower side in an lamination direction of the MR element; a second shield layer that is disposed on an upper side in the lamination direction of the MR element, and that applies voltage to the MR element together with the first shield layer; and side shield layers that are disposed on both sides of the MR element in a truck width direction. The side shield layers include soft magnetic layers and hard magnetic layers magnetized in a predetermined direction.

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Номер записи: 30

01-11-2012 дата публикации

System for fiber dc magneto-optic detection and method thereof

Номер: US20120274321A1

Автор: Haijun Yuan

Принадлежит: Individual

A system for fiber DC magneto-optic detection and method thereof are provided. The system comprises a power supply and signal processing module (400), an optical fiber device (200), a magneto-optic probe (100) and a reference device (300). The reference device (300) is mounted in the system, and the measured signal can be corrected via a reference magnetic field pulse signal generated by the reference device (300) so as to eliminate the influence that the environmental factors caused on the measurement, and to obtain accurate measurement data, thus improving measurement accuracy of the system.

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Номер записи: 31

15-11-2012 дата публикации

Spin current generator for stt-mram or other spintronics applications

Номер: US20120287704A1

Автор: Gurtej Sandhu, Jun Liu

Принадлежит: Micron Technology Inc

Spin current generators and systems and methods for employing spin current generators. A spin current generator may be configured to generate a spin current polarized in one direction, or a spin current selectively polarized in two directions. The spin current generator may by employed in spintronics applications, wherein a spin current is desired.

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Номер записи: 32

15-11-2012 дата публикации

Manufacturing method of magneto-resistive element

Номер: US20120288963A1

Автор: Kazumasa Nishimura

Принадлежит: Canon Anelva Corp

The present invention provides a manufacturing method of a magneto-resistive element capable of obtaining a higher MR ratio, in a method of forming a metal oxide layer (e.g., MgO layer) by oxidation treatment of a metal layer (e.g., Mg layer). An embodiment of the present invention includes the steps of; providing a substrate having a first ferromagnetic layer; fabricating a tunnel barrier layer on the first ferromagnetic layer; and forming a second ferromagnetic layer on the tunnel barrier layer. The step of fabricating the tunnel barrier layer includes; the steps of; depositing a first metal layer on the first ferromagnetic layer; oxidizing the first metal layer; depositing a second metal layer on the oxidized first metal layer; and performing heating treatment on the oxidized first metal layer and the second metal layer at a temperature at which the second metal layer boils.

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Номер записи: 33

22-11-2012 дата публикации

Magnetoresistance sensor with built-in self-test and device configuring ability and method for manufacturing same

Номер: US20120293164A1

Автор: Fu-Tai Liou, Ta-Yung WONG, Tai-Lang TANG, Wei-Tung Peng

Принадлежит: Voltafield Technology Corp

A magnetoresistance sensor includes a multifunctional circuit structure having the functionality of built-in self-testing and/or device configuration. The magnetoresistance sensor further includes a substrate having a first dielectric layer formed thereon and a magnetoresistance structure. The multifunctional circuit structure is disposed on the dielectric layer and includes a winding structure for generating a magnetic field for testing and configuring the magnetoresistance sensor. The magnetoresistance structure is disposed on the multifunctional circuit structure, wherein a topmost layer of the magnetoresistance structure includes a magnetoresistance layer, and the magnetoresistance structure generates electrical resistance variance corresponding to the generated magnetic field for testing and configuring the magnetoresistance sensor. A method for manufacturing the magnetoresistance sensor is also provided.

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Номер записи: 34

13-12-2012 дата публикации

Magnetic Field Detection Using Faraday Effect

Номер: US20120313634A1

Автор: Allen D. Parks

Принадлежит: US Department of Navy

A magnetometer is provided for detecting a magnetic field of strength B using the Faraday effect. The magnetometer includes a photon emitter, a first polarizer, a prism, a second polarizer, a detector and an analyzer. The emitter projects an emitted light beam substantially parallel to the magnetic field and having wavelength λ. The prism has an interface surface and is composed of a Faraday medium having Verdet value V. The emitted light beam passes through the first polarizer and then the prism, exiting from the interface surface making an incident angle θ 0 to normal of the surface and then refracting into a secondary medium as first and second circularly polarized light beams that are separated by a small angular divergence δ. These polarized light beams have average refraction angle θ to the normal and pass through a post-selection polarizer before the detector measures a weak value A w of a photon having “which path” operator Â associated with the polarized light beams. The magnetic field strength is determined as B ≈ - 2  ɛ   A w  π   n 0  cos   θ V   λsin   θ 0 . The parameters include n 0 as index of refraction of the secondary medium, and ε as amplification factor. The pointer rotation angle A w can be expressed as A w = ( θ + - θ - )  cos   ɛ + [ ( θ + + θ - ) - 2  θ 0 ]  sin   ɛ 2   sin   ɛ in which θ + and θ − are respectively right- and left-polarized refraction angles with the average refraction angle such that θ = 1 2  ( θ + + θ - ) . The pointer rotation angle A w can be approximated as A w ≈δ/2ε when 0<ε<<1. A method is provided incorporating operations described for the magnetometer.

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Номер записи: 35

20-12-2012 дата публикации

Method of measuring contact failure and contact failure measuring device

Номер: US20120319854A1

Автор: Atsushi Demachi, Hideyuki Tsuchikiri, Koji Fukuda, Susumu Maruyama

Принадлежит: Honda Motor Co Ltd

In the disclosed method of measuring contact failure and contact failure measuring device, the magnitude of the excessive response fluctuation of the inductive magnetic field around a harness under measurement when an external force is applied to a terminal fitting part of the harness is detected by a magnetic sensor, and the result is displayed as an index of the quality of the contact state of the terminal fitting part.

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Номер записи: 36

03-01-2013 дата публикации

Giant Magnetoresistive Sensor Having Horizontal Stablizer

Номер: US20130003229A1

Автор: Kevin D. McKinstry

Принадлежит: Oracle International Corp

A giant magnetoresistive (GMR) sensor for reading information from a magnetic storage medium has a first non-magnetoresistive layer, a first magnetoresistive layer formed on the first non-magnetoresistive layer, a second non-magnetoresitive layer formed on the first magnetoresistive layer, a second magnetoresistive layer formed on the second non-magnetoresistive layer, and a third non-magnetoresistive layer formed on the second magnetoresistive layer. The first non-magnetoresistive layer is provided with a single step on a surface of the first non-magnetoresistive layer. The step has an edge extending in a direction substantially parallel to a plane of a working surface of the GMR sensor.

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Номер записи: 37

10-01-2013 дата публикации

Electrical current sensor device

Номер: US20130008022A1

Автор: Koyu Yamanoi, Ming Gao Yao, Wei Xiong

Принадлежит: SAE Magnetics HK Ltd

An electrical current sensor device includes a first printed circuit board assembly, a second printed circuit board assembly positioned opposite to the first printed circuit board assembly, and a holder holding the first and second printed circuit board assemblies and providing a passage to allow an electrical conductor to pass through. The first printed circuit board assembly includes a first sensing circuit having a first element pair that includes two magnetoresistive elements with a first pinning direction, the second printed circuit board assembly comprises a second sensing circuit with a second element pair that includes having two magnetoresistive elements with a second pinning direction that is opposite to the first pinning direction, and the first and second pinning directions are perpendicular to a current direction of a current passing through the electrical conductor, the first sensing circuit electrically connects with the second sensing circuit to form a Wheatstone bridge circuit.

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Номер записи: 38

10-01-2013 дата публикации

Probe card and method for testing magnetic sensors

Номер: US20130009659A1

Автор: Lianjun Liu, Phillip MATHER

Принадлежит: Everspin Technologies Inc

A probe card and method are provided for testing magnetic sensors at the wafer level. The probe card has one or more probe tips having a first pair of solenoid coils in parallel configuration on first opposed sides of each probe tip to supply a magnetic field in a first (X) direction, a second pair of solenoid coils in parallel configuration on second opposed sides of each probe tip to supply a magnetic field in a second (Y) direction orthogonal to the first direction, and an optional third solenoid coil enclosing or inscribing the first and second pair to supply a magnetic field in a third direction (Z) orthogonal to both the first and second directions. The first pair, second pair, and third coil are each symmetrical with a point on the probe tip array, the point being aligned with and positioned close to a magnetic sensor during test.

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Номер записи: 39

10-01-2013 дата публикации

Spin-torque oscillator (sto) with magnetically damped free layer

Номер: US20130009712A1

Автор: Bruce Alvin Gurney, Patrick Mesquita Braganca

Принадлежит: Individual

A spin-torque oscillator (STO) has increased magnetic damping of the oscillating free ferromagnetic layer. The Gilbert magnetic damping parameter (a) is at least 0.05, and preferably greater than 0.05. The free layer may be a any type of conventional ferromagnetic material, but contains one or more damping elements as a dopant. The damping element is selected from the group consisting of Pt, Pd and the 15 lanthanide elements. The free layer damping may also be increased by a damping layer adjacent the free layer. One type of damping layer may be an antiferromagnetic material, like a Mn alloy. As a modification to the antiferromagnetic damping layer, a bilayer damping layer may be formed of the antiferromagnetic layer and a nonmagnetic metal electrically conductive separation layer between the free layer and the antiferromagnetic layer. Another type of damping layer may be one formed of one or more of the elements selected from Pt, Pd and the lanthanides.

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Номер записи: 40

17-01-2013 дата публикации

Current detection apparatus

Номер: US20130015842A1

Автор: Yasunori KAWAGUCHI

Принадлежит: Yazaki Corp

A current detection apparatus includes two magnetic detectors that are arranged oppositely on a front surface and a back surface of a board which is located above a current path in order to detect a strength of a magnetic field, an electromagnetic shielding frame member that is mounted on the current path so that the two magnetic detectors and a part of the current path are accommodated inside the electromagnetic shielding frame member, and a control circuit that determines whether a failure which occurs in either of the two magnetic detectors from a difference between magnetic fields detected by the two magnetic detectors, respectively. Sensitivities of the two magnetic detectors are made adjusted so that current values outputted from the two magnetic detectors depending on detected magnetic fields are identical to each other in a normal state.

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Номер записи: 41

31-01-2013 дата публикации

Fiber optic magnetic flux sensor for application in high voltage generator stator bars

Номер: US20130027030A1

Автор: Erik ABROMITIS, Michael Twerdochlib

Принадлежит: Siemens Energy Inc

A magnetic flux sensor for measuring the radial component of the magnetic flux impinging on a stator bar of a high voltage generator. The magnetic flux sensor includes a fiber Bragg grating formed in an optical fiber and enclosed within a magnetostrictive coating. The magnetostrictive coating responds to changes in magnetic flux by applying a strain on the fiber that changes the reflected wavelength of the Bragg grating that can be measured to provide a measurement of the flux. In one embodiment, one or more of the magnetic flux sensors is positioned directly within an insulating layer of the particular stator bar.

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Номер записи: 42

31-01-2013 дата публикации

Thin-wafer current sensors

Номер: US20130029432A1

Автор: Mario Motz, Udo Ausserlechner

Принадлежит: INFINEON TECHNOLOGIES AG

Embodiments relate to IC current sensors fabricated using thin-wafer manufacturing technologies. Such technologies can include processing in which dicing before grinding (DBG) is utilized, which can improve reliability and minimize stress effects. While embodiments utilize face-up mounting, face-down mounting is made possible in other embodiments by via through-contacts. IC current sensor embodiments can present many advantages while minimizing drawbacks often associated with conventional IC current sensors.

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Номер записи: 43

21-02-2013 дата публикации

Magnetometer bias and anomaly detector

Номер: US20130046489A1

Автор: William Kerry Keal

Принадлежит: InvenSense Inc

The computer implemented method, system or computer program product comprises collecting magnetometer data from the device; and calculating a center of a shape of the magnetometer data as a result of minimization. The minimization of calculating the center of the shape further comprises calculating a plurality of running sums of the magnetometer data; storing the plurality of running sums; storing a count of the number of terms in each of the running sums; and calculating the center of the shape and setting the estimated magnetometer bias to the center of the shape. The radius of the sphere is calculated to ensure accuracy in the estimator of the magnetometer bias.

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Номер записи: 44

28-02-2013 дата публикации

Semiconductor Chip Package and Method

Номер: US20130049746A1

Автор: Stefan Landau, Udo Ausserlechner, Volker Strutz

Принадлежит: INFINEON TECHNOLOGIES AG

A semiconductor chip package and a method to manufacture a semiconductor chip package are disclosed. An embodiment of the present invention comprises a substrate and a semiconductor chip disposed on the substrate and laterally surrounded by a packaging material. The package further comprises a current rail adjacent the semiconductor chip, the current rail isolated from the semiconductor chip by an isolation layer, a first external pad, and a via contact contacting the current rail with the first external pad.

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Номер записи: 45

14-03-2013 дата публикации

Conductor to which current detection head is fixed, and current detection head used in manufacture of same

Номер: US20130063128A1

Автор: Yusuke Seo

Принадлежит: Toyota Motor Corp

Provided is a technique for mass-producing a conductor to which is fixed a current detection head that detects the value of current flowing in the conductor, and in which the relationship between the detection value and the current value is stabilized. The head comprises a lens, a magneto-optical element, a conductor, and a fixing member, and the lens, the magneto-optical element, and the conductor are respectively fixed to the fixing member. An optical system is formed using the current detection head such that light is guided through the lens to the magneto-optical element, and light affected by a magneto-optical effect due to the magneto-optical element is guided to the lens. All of the members contributing to current detection are fixed to the fixing member, and therefore the relative positional relationships of all the members contributing to current detection are uniquely determined, enabling conductors with little variation in current detection characteristics to be mass-produced. A shape for determining the positional relationship between the fixing member and the conductor may be formed therebetween in advance, and the positioned current detection head and conductor may be fixed to obtain the conductor.

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Номер записи: 46

28-03-2013 дата публикации

Magnetic memory

Номер: US20130075847A1

Автор: Hiroaki Honjou

Принадлежит: NEC Corp

A magnetic memory has: a pinning layer being a perpendicular magnetic film whose magnetization direction is fixed; an underlayer formed on the pinning layer; and a data storage layer being a perpendicular magnetic film formed on the underlayer. The data storage layer has: a magnetization free region whose magnetization direction is reversible; and a magnetization fixed region magnetically coupled with the pinning layer through the underlayer. A magnetization direction of the magnetization fixed region is fixed by the magnetic coupling. The underlayer has a magnetic underlayer made of a magnetic material.

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Номер записи: 47

28-03-2013 дата публикации

Magnetic sensor device

Номер: US20130076350A1

Автор: Daisuke Muraoka, Kentaro Fukai, Minoru Ariyama, Tomoki Hikichi

Принадлежит: Seiko Instruments Inc

A magnetic sensor device for generating a logic output in accordance with a magnetic field intensity applied to a magnetoelectric conversion element includes: a comparator for inputting amplified output signals of the magnetoelectric conversion element, and outputting a comparison result; and a logic circuit for performing arithmetic processing on an output signal of the comparator. Only when the logic output is changed by a change in the magnetic field intensity, the logic circuit performs successive matching determination of logic outputs a plurality of times. Thus, the variation in determination for detection or canceling of a magnetic field intensity, which is caused by noise generated from respective constituent elements included in the magnetic sensor device and external noise, may be reduced while suppressing electric power consumption.

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Номер записи: 48

28-03-2013 дата публикации

Metering device and metering method

Номер: US20130076351A1

Автор: Yo Sub Moon

Принадлежит: Samsung Electro Mechanics Co Ltd

Provided is a metering device and a metering method. The metering device includes a Hall sensor configured to output a Hall voltage generated by a magnetic field generated from a power supply line, an analog-digital converter configured to receive a voltage signal between a minimum voltage value and a maximum voltage value to convert the voltage signal into a digital signal and output the digital signal, an output adjustment unit connected between the Hall sensor and the analog-digital converter, and configured to attenuate and output the Hall voltage when the Hall voltage output from the Hall sensor is larger than the maximum voltage value and output adjustment information that adjusted the Hall voltage, and a control unit connected to the analog-digital converter and the output adjustment unit, and calculate the digital signal output from the analog-digital converter and the adjustment information output from the output adjustment unit to calculate wattage.

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Номер записи: 49

04-04-2013 дата публикации

Apparatus having a back-bias magnet and a semiconductor chip element

Номер: US20130082340A1

Автор: Georg Ernst, Horst Theuss, Klaus Elian

Принадлежит: INFINEON TECHNOLOGIES AG

An apparatus may include a back-bias magnet; and a semiconductor chip element; wherein the semiconductor chip element has a sensor for measuring a magnetic field strength; and wherein a contact surface is formed on a contact side of the back-bias magnet and on a contact side of the semiconductor chip element and wherein the contact side of the semiconductor chip element has one or more structures such that the contact surface of the back-bias magnet is shaped in a manner corresponding to the structures of the semiconductor chip element.

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Номер записи: 50

04-04-2013 дата публикации

Hall-Effect Measurement Apparatus

Номер: US20130082694A1

Автор: Che-Hung Liu, Ming-Cheng Lin

Принадлежит: Taiwan Semiconductor Manufacturing Co TSMC Ltd

A Hall-Effect measure apparatus comprises a magnetic source, a wafer on a thermal chuck, a dc current source and a voltage meter. The magnetic source generates a magnetic field in a perpendicular position relative to the wafer. Furthermore, the magnetic field is targeted at a specific region of the wafer to be tested. By performing a Hall-Effect measurement and van der Pauw measurement, the carrier mobility of the specific region of the wafer can be calculated.

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Номер записи: 51

04-04-2013 дата публикации

Nuclear magnetic resonance imaging apparatus and nuclear magnetic resonance imaging method

Номер: US20130082701A1

Автор: Kiyoshi Ishikawa, Natsuhiko Mizutani, Tetsuo Kobayashi

Принадлежит: Canon Inc

The present invention has an object to provide a nuclear magnetic resonance imaging apparatus or the like that avoids a region with zero sensitivity of an optical magnetometer and allows imaging by strong magnetic resonance when a common magnetic field is used as a bias field of an optical magnetometer and as a magnetostatic field to be applied to a sample. When a direction of a magnetostatic field application unit applying a magnetostatic field to a sample is a z direction, alkali metal cells of a plurality of scalar magnetometers are arranged so as not to overlap a region to be imaged in a z direction, and so as not to intersect the region to be imaged in an in-plane direction perpendicular to the z direction.

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Номер записи: 52

11-04-2013 дата публикации

TWO-CORE OPTICAL FIBER MAGNETIC FIELD SENSOR

Номер: US20130088223A1

Автор: Konno Yoshihiro, Sasaki Masaru

Принадлежит: ADAMANT KOGYO CO., LTD.

A two-core optical fiber magnetic field sensor is configured from at least a light incidence/emission unit; a lens; a magnetic garnet; and a reflector, wherein the lens and the magnetic garnet are disposed between the light incidence/emission end of the light incidence/emission unit and the reflector; a light beam is emitted from one optical fiber; the light beam is reflected by the reflector after being transmitted through the lens and the magnetic garnet; the light beam is transmitted again through the magnetic garnet and the lens after the reflection; and incident on the other optical fiber, the light beam is emitted again from the other optical fiber, and reflected by the reflector after being transmitted through the lens and the magnetic garnet; and the light beam is transmitted again through the magnetic garnet and the lens after the reflection and incident again on the one optical fiber. 1. A two-core optical fiber magnetic field sensor at least comprising:a light incidence/emission unit;a lens;a magnetic garnet; anda reflector,wherein the lens and the magnetic garnet are arranged between a light incidence/emission end portion of the light incidence/emission unit and the reflector,the light incidence/emission unit is configured to include two single mode optical fibers,a light beam emitted from the one optical fiber transmits through the lens and the magnetic garnet and is reflected by the reflector, and after the reflection, the light beam transmits through the magnetic garnet and the lens again and is incident on the other optical fiber, anda light beam is emitted from the other optical fiber again and transmits through the lens and the magnetic garnet and is reflected by the reflector, and after the reflection, the light beam transmits through the magnetic garnet and the lens again and is incident on the one optical fiber again.2. The two-core optical fiber magnetic field sensor according to claim 1 , wherein a plurality of the magnetic garnets are ...

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Номер записи: 53

11-04-2013 дата публикации

CPP Device with Improved Current Confining Structure and Process

Номер: US20130088797A1

Автор: Kunliang Zhang, Min Li, Yue Liu

Принадлежит: Headway Technologies Inc

Plasma nitridation, in place of plasma oxidation, is used for the formation of a CCP layer. Al, Mg, Hf, etc. all form insulating nitrides under these conditions. Maintaining the structure at a temperature of at least 150° C. during plasma nitridation and/or performing post annealing at a temperature of 220° C. or higher, ensures that no copper nitride can form. Additionally, unintended oxidation by molecular oxygen of the exposed magnetic layers (mainly the pinned and free layers) is also avoided

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Номер записи: 54

18-04-2013 дата публикации

Magnetic Field Sensor and Method Used in a Magnetic Field Sensor That Adjusts a Sensitivity and/or an Offset Over Temperature

Номер: US20130093416A1

Автор: Haas David J., Vig Ravi

Принадлежит:

A magnetic field sensor and a method associated with the magnetic field sensor provide gain correction coefficients and/or offset correction coefficients stored in the magnetic field sensor in digital form. The gain correction coefficients and/or offset correction coefficients can be used to generate analog control signals to control a sensitivity and/or an offset of an analog signal path through the magnetic field sensor. 1. A magnetic field sensor , comprising:a magnetic field sensing element configured to generate a magnetic field signal;a gain adjustable analog circuit coupled to receive a signal representative of the magnetic field signal, coupled to receive a gain control signal, and configured to generate a gain adjusted signal having a gain responsive to the gain control signal;a coefficient table memory configured to receive and store a plurality of gain correction coefficients, wherein pairs of the plurality of gain correction coefficients are associated with boundaries of respective temperature segments, each temperature segment bounded by a pair of temperatures, wherein temperature boundaries of the temperature segments are unequally spaced;a temperature sensor configured to generate a temperature signal representative of a temperature; anda segment processor coupled to receive a signal representative of the temperature signal, configured to identify a temperature segment in which the temperature represented by the temperature signal is lies, coupled to receive a pair of gain correction coefficients associated with the identified temperature segment, and configured to interpolate between the pair of gain correction coefficients in accordance with the temperature signal to generate an interpolated gain correction value, wherein the gain control signal is related to the interpolated gain correction value.2. The magnetic field sensor of claim 1 , further comprising a user gain correction value register coupled to receive a user gain correction value claim 1 ...

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Номер записи: 55

18-04-2013 дата публикации

Device Comprising Deuterated Organic Interlayer

Номер: US20130095327A1

Автор: Fujian Wang, Leonard Wojcik, Tho Duc Nguyen, Zeev Valy Vardeny

Принадлежит: University of Utah Research Foundation UURF

The present invention relates to devices that can be manipulated or controlled with a magnetic field, such as a spin-valve device, an organic light-emitting device, a compass, or a magnetometer. The devices of the invention comprise an organic interlayer comprising a deuterated organic material.

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Номер записи: 56

25-04-2013 дата публикации

Magnetic nano-multilayers for magnetic sensors and manufacturing method thereof

Номер: US20130099780A1

Автор: Houfang Liu, Qinli Ma, Xiufeng Han

Принадлежит: Institute of Physics of CAS

The invention discloses a magnetic nano-multilayers structure and the method for making it. The multilayer film includes—sequentially from one end to the other end—a substrate, a bottom layer, a magnetic reference layer, a space layer, a magnetic detecting layer and a cap layer. The, up-stated structure is for convert the information of the rotation of the magnetic moment of the magnetic detecting layer into electrical signals. The magnetic detecting layer is of a pinning structure to react to the magnetic field under detection. On the other hand, the invention sandwiches an intervening layer between the AFM and the FM to mitigate the pinning effect from the exchange bias. Moreover, the thickness of the intervening layer is adjustable to control the pinning effect from the exchange bias. The controllability ensures that the magnetic moments of the magnetic reference layer and the magnetic detecting layer remain at right angles to each other when the external field is zero. The invention achieves a GMR or TMR magnetic sensor exhibiting a linear response and by tuning the thickness of the non-magnetic metallic layer, the sensitivity as well as the detecting range of the devices can be tuned easily.

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Номер записи: 57

25-04-2013 дата публикации

CURRENT SENSOR AND METHOD FOR DETECTING A CURRENTLESS STATE

Номер: US20130099781A1

Автор: Franke Joerg, HEBERLE Klaus

Принадлежит: Micronas GmbH

A current sensor having a magnetic field sensor, and a variable current source connected to the magnetic field sensor, and a first differential amplifier, connected to the magnetic field sensor, for amplifying a first sensor voltage. A second differential amplifier is provided and the second differential amplifier is connected to the first differential amplifier and to the current source. In the case of the first sensor voltage, a first operating current is present at the magnetic field sensor and in the case of a second sensor voltage, a second operating current is present, whereby the second Hall voltage is smaller than the first sensor voltage and the second operating current is greater than the first operating current. 1. A current sensor for detecting a currentless state , the current sensor comprising:a magnetic field sensor;a variable supply connectable to the magnetic field sensor;a first differential amplifier connectable to the magnetic field sensor, the first differential amplifier being configured to amplify a first sensor voltage, the first differential amplifier having an output that is configured to provided an amplified analog sensor voltage; anda second differential amplifier connectable to the supply, the second differential amplifier having a first input and a second input,wherein the first input of the second differential amplifier is connected directly to the output of the first differential amplifier and the second input of the second differential amplifier is connected to a reference voltage so that the amplified analog sensor voltage is provided at the first input of the second differential amplifier,wherein the first differential amplifier, the second differential amplifier, and the magnetic field sensor with the variable supply form an analog control loop;wherein, in the case of the first sensor voltage, a first operating current or a first supply voltage is provided at the magnetic field sensor, and, in the case of a second sensor voltage, ...

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Номер записи: 58

25-04-2013 дата публикации

HALL SENSOR SYSTEM

Номер: US20130099782A1

Автор: KEJIK Pavel, REYMOND Serge

Принадлежит: LEM INTELLECTUAL PROPERTY SA

Integrated circuit Hall sensor system comprising a plurality of elementary blocks (EB), each elementary block including a Hall cell (), a differential pair () of an input stage of a Differential Difference Amplifier (DDA), and terminals (), wherein the terminals () are placed laterally on opposing outer sides of each elementary block parallel to a Y axis and the plurality of elementary blocks are arranged in a juxtaposed manner to form at least one row () extending along an X axis orthogonal to the Y axis and interconnected by the terminals. 114-. (canceled)15. Integrated circuit Hall sensor system comprising a plurality of elementary blocks (EB) , each elementary block including a Hall cell , a switch box connected to the Hall cell , an input stage of an amplifier , and terminals , wherein the terminals are placed laterally on opposing outer sides of each elementary block parallel to a Y axis and the plurality of elementary blocks are arranged in a juxtaposed manner to form at least one row extending along an X axis orthogonal to the Y axis and interconnected by the terminals.16. Integrated circuit Hall sensor system according to claim 15 , wherein said switch box connected to the Hall cell is a four phase switch box.17. Integrated circuit Hall sensor system according to claim 15 , wherein each row of elementary blocks is terminated by a second stage of said amplifier claim 15 , forming a front-end channel.18. Integrated circuit Hall sensor system according to claim 17 , wherein each channel comprises a logic circuit connected through connections (A claim 17 , B claim 17 , C claim 17 , D) of the elementary blocks configured to deliver logic signals to a four phase current switch box of each elementary block connected to the Hall cell to perform four-phase spinning current on each Hall cell.19. Integrated circuit Hall sensor system according to claim 17 , wherein each channel comprises a demodulator based on a switched-capacitor circuit.20. Integrated circuit Hall ...

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Номер записи: 59

25-04-2013 дата публикации

Dual-axis anisotropic magnetoresistive sensors

Номер: US20130099783A1

Автор: Jan KUBIK

Принадлежит: Individual

An integrated dual-axis anisotropic magnetoresistive sensor can include first and second sensor units. A resistor bridge of the first sensor unit can include a plurality of magnetoresistors, each having at least one strip of anisotropic magnetoresistive material with a longitudinal axis substantially parallel to the technological anisotropy axis of the material. A resistor bridge of the second sensor unit can include a plurality of magnetoresistors having a plurality of strips of the anisotropic magnetoresistive material, the plurality of strips including a first subset having longitudinal axes aligned at a first angle to the technological anisotropy axis and a second subset having longitudinal axes aligned at a second angle to the technological anisotropy axis. The second angle can have the same magnitude as the first, but be rotated in an opposite direction from the technological anisotropy axis.

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Номер записи: 60

02-05-2013 дата публикации

Electric motor, steering device and method

Номер: US20130106340A1

Автор: Antoine Chabaud, Pascal Hiry

Принадлежит: ROBERT BOSCH GMBH

The invention relates to an electronically commutated electric motor. The electronically commutated electric motor comprises a stator and a rotor, which in particular is designed to be permanently magnetic. The electric motor also comprises a rotor position sensor, wherein the rotor position sensor is designed to detect a predetermined number of in particular discrete, rotor positions along a rotational direction of the rotor. The rotor position sensor is also designed to generate a sensor signal representing the rotor positions. The electric motor also comprises a control unit connected to the rotor position sensor, wherein the control unit is designed to actuate the stator in order to generate a magnetic rotary field in dependence on the sensor signal. According to the invention, the control unit comprises an input for a steering angle signal, in particular an analog or digital steering angle signal, which represents a steering angle of a vehicle steering system. The control unit is designed to additionally actuate the stator depending on the steering angle signal.

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Номер записи: 61

02-05-2013 дата публикации

Eddy current array probe

Номер: US20130106409A1

Автор: Aparna Chakrapani Sheila-Vadde, Changting Wang, Mandar Diwakar Godbole, Yuri Alexeyevich Plotnikov

Принадлежит: General Electric Co

Present embodiments include eddy current array probes having differential coils capable of detecting both long and short flaws in a test specimen and, additionally or alternatively, multiplexed drive coils. For example, an eddy current array probe may include a first plurality of eddy current channels disposed in a first row and a second plurality of eddy current channels disposed in a second row. The first plurality and second plurality of eddy current channels overlap in a first direction but do not overlap in a second direction. The probe also includes a semi-circular drive coil disposed proximate to the first plurality and second plurality of eddy current channels and configured to generate a probing magnetic field for each sense coil of the eddy current channels.

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Номер записи: 62

02-05-2013 дата публикации

Magnetic head, magnetic sensor, and magnetic recording/reproducing apparatus

Номер: US20130107395A1

Автор: Hirofumi Suto, Kiwamu Kudo, Koichi Mizushima, Rie Sato, Tao Yang, Tazumi Nagasawa

Принадлежит: Individual

A magnetic head according to an embodiment includes: a spin-torque oscillator comprising a first ferromagnetic layer, a second ferromagnetic layer, a third ferromagnetic layer provided on the opposite side of the second ferromagnetic layer from the first ferromagnetic layer, a first nonmagnetic layer provided between the first ferromagnetic layer and the second ferromagnetic layer, a second nonmagnetic layer provided between the second ferromagnetic layer and the third ferromagnetic layer, a first electrode provided on a surface on the opposite side of the first ferromagnetic layer from the first nonmagnetic layer, and a second electrode provided on a surface on the opposite side of the third ferromagnetic layer from the second nonmagnetic layer. Magnetization precession is induced in each of the first through third ferromagnetic layers when current is applied between the first and second electrodes.

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Номер записи: 63

09-05-2013 дата публикации

CIRCUIT ASSEMBLY AND METHOD FOR PROGRAMMING A HALL SENSOR HAVING AN UPSTREAM CONTROLLER

Номер: US20130113476A1

Автор: BAGNUOLI Gualtiero, DE ROSA Adriano

Принадлежит: Micronas GmbH

A circuit assembly having a controller in which the Hall sensor or a programmable circuit component integrated therein is programmed by clocking or modulating a Hall sensor power supply voltage. A clocked or modulated controller power supply voltage is applied to the controller in clocked or modulated form; and where the clock or modulated Hall sensor power supply voltage is applied to the Hall sensor by the controller as a function of the clocked or modulated controller power supply voltage. 1. A circuit assembly , comprising:a housing;a Hall sensor including a Hall sensor power supply voltage terminal for applying a Hall sensor power supply voltage, a Hall sensor output terminal for providing measured values or a measuring voltage, and an integrated programmable circuit component which is programmable by clocking or modulation of the Hall sensor power supply voltage; anda controller configured upstream of the Hall sensor, which controller includes a controller power supply voltage terminal for applying a controller power supply voltage and an internal output terminal for applying a control signal which is proportional to or equal to the controller power supply voltage,wherein the internal output terminal is connected to or connectable to the Hall sensor power supply voltage terminal for applying the control signal from the controller power supply voltage terminal,wherein the Hall sensor power supply voltage is clocked or modulated to provide the control signal for programming the circuit component, andwherein the Hall sensor and the upstream controller are configured in the housing.2. The circuit assembly of claim 1 , wherein the controller has an internal voltage output terminal that is connectable to the Hall sensor power supply voltage terminal and outputs the Hall sensor power supply voltage claim 1 , and wherein the Hall sensor power supply voltage is less than the controller power supply voltage.3. The circuit assembly of claim 2 , wherein the internal ...

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Номер записи: 64

23-05-2013 дата публикации

Electronic device comprising hall effect region with three contacts

Номер: US20130127453A1

Автор: Udo Ausserlechner

Принадлежит: INFINEON TECHNOLOGIES AG

An electronic device is disclosed as a part of a magnetic field sensor or a mechanical stress sensor. The electronic device includes a Hall effect region, a first contact (temporarily functioning as a first supply contact), a second contact (second supply contact), and a third contact (temporarily functioning as a first sense contact) that are arranged in or on a surface of the Hall effect region. The first contact and the third contact are arranged in a substantially symmetrical manner to each other with respect to the second contact. An electrical current distribution within the Hall effect region is influenced by a physical quantity (e.g. magnetic field strength or mechanical stress) to be measured. A sense signal tapped at the third contact is a function of the current distribution, the sense signal thus being indicative of the physical quantity. A corresponding sensing method using the electronic device is also disclosed.

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Номер записи: 65

23-05-2013 дата публикации

MAGNETIC FIELD VECTOR SENSOR

Номер: US20130127455A1

Автор: Delamare Jérôme, Ettelt Dirk, Lebedev Gor, VIALA Bernard

Принадлежит:

A magnetic field vector sensor includes a substrate parallel to a plane, a support mobile relative to it and rotatable about a vertical rotation axis perpendicular to it, a magnetic field source generating a field having a moment in a non-perpendicular direction, the source being fixed to the support with no degree-of-freedom to exert torque on the support when a field to be measured is present, the field being non-collinear with the moment, a transducer to convert torque exerted on the support into a field amplitude of a component of the field along a measurement axis in the plane, wherein the source comprises a magnetostrictive permanent magnet for generating the field having a moment whose direction varies with stress on the magnet, and wherein the sensor further comprises a controllable device to reversibly modify the moment direction, and a stress generator to vary stress and hence moment direction. 1. An apparatus comprising a magnetic field vector sensor , said magnetic field vector sensor comprising a fixed substrate extending essentially parallel to a substrate plane , a mobile support , said mobile support being mobile relative to said fixed substrate and rotatable about at least a vertical rotation axis perpendicular to said substrate plane , a magnetic field source for generating a magnetic field having a magnetic moment in a direction that is not perpendicular to said substrate plane , said magnetic field source being fixed to said mobile support with no degree-of-freedom so as to exert a mechanical torque on said mobile support about said vertical rotation axis when a magnetic field to be measured is present , said magnetic field to be measured being non-collinear with said magnetic moment , at least one transducer adapted to convert said mechanical torque exerted on said mobile support about said vertical rotation axis into a signal representative of an amplitude of a component of said magnetic field to be measured along a measurement axis contained ...

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Номер записи: 66

23-05-2013 дата публикации

MAGNETIC BALANCE TYPE CURRENT SENSOR

Номер: US20130127456A1

Автор: HEBIGUCHI Hiroyuki

Принадлежит: ALPS GREEN DEVICES CO., LTD.

A magnetic balance type current sensor includes: a magnetic detection bridge circuit of which output varies due to an induced magnetic field from a current wire; a magnetic field attenuation unit that attenuates the induced magnetic field that acts on a magnetoresistive effect element; and a feedback coil which generates a cancel magnetic field that cancels the induced magnetic field in accordance with the output of the magnetic detection bridge circuit, and through which a current corresponding to the current to be measured flows when it enters a balanced state in which the cancel magnetic field and the induced magnetic field cancel each other, wherein the feedback coil is provided in such a manner that a direction of the cancel magnetic field that acts on the magnetic field attenuation unit is opposite to a direction of the induced magnetic field that acts on the magnetic field attenuation unit. 1. A magnetic balance type current sensor comprising:a magnetic sensor of which output varies due to an induced magnetic field from a current wire through which a current to be measured flows;a magnetic field attenuation unit that attenuates the induced magnetic field that acts on the magnetic sensor; anda feedback coil which generates a cancel magnetic field that cancels the induced magnetic field in accordance with the output of the magnetic sensor, and through which a current corresponding to the current to be measured flows when it enters a balanced state in which the cancel magnetic field and the induced magnetic field cancel each other,wherein the feedback coil is provided in such a manner that a direction of the cancel magnetic field that acts on the magnetic field attenuation unit is opposite to a direction of the induced magnetic field that acts on the magnetic field attenuation unit.2. The magnetic balance type current sensor according to claim 1 ,wherein the magnetic field attenuation unit is disposed between the magnetic sensor and the current wire.3. The ...

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Номер записи: 67

30-05-2013 дата публикации

Integrated Magnetometer and its Manufacturing Process

Номер: US20130134970A1

Автор: Gaudin Gilles, Montaigne François, Sabon Philippe, Schuhl Alain, Zermatten Pierre-Jean

Принадлежит:

Integrated magnetometer comprising a plurality of multilayer magnetoresistive sensors deposited on a surface, called the top surface, of a substantially planar substrate, characterized in that said top surface of the substrate has at least one cavity or protuberance provided with a plurality of inclined faces, and in that at least four said magnetoresistive sensors are placed on four said magnetoresistive sensors are placed on four said inclined faces, having different orientations and opposite one another in pairs, each sensor being sensitive to one component of an external magnetic field parallel to that face on which it is placed. Process for manufacturing such a magnetometer. 1. An integrated magnetometer comprising a plurality of multilayer magnetoresistive sensors (R , R , R , R) deposited on a top surface of a substantially planar substrate (2) , the magnetometer being characterized in that:said top surface of the substrate presents at least one cavity or projection (P, CP) having a plurality of inclined faces; and in thatat least four of said magnetoresistive sensors are deposited on four of said inclined faces, presenting orientations that are different and opposite in pairs, each sensor being sensitive to an external magnetic field component that is parallel to the face on which it is deposited.2. An integrated magnetometer according to claim 1 , wherein said substrate is of the monocrystalline type claim 1 , in particular of silicon claim 1 , said inclined faces corresponding to crystal planes of the substrate.3. An integrated magnetometer according to claim 1 , wherein said or each cavity or projection presents the shape of a pyramid or a truncated pyramid claim 1 , having a base which is square or rectangular.4. A magnetometer according to claim 3 , wherein the sensitivity axes (A claim 3 , A claim 3 , A claim 3 , A) of said sensors are directed towards or away from the tip of said pyramid.5. A magnetometer according to claim 1 , wherein each of said ...

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Номер записи: 68

30-05-2013 дата публикации

MAGNETIC-FIELD DETECTION MICROCOMPUTER AND MAGNETIC-FIELD DETECTION METHOD

Номер: US20130138374A1

Автор: KOMATSU Shigeyuki, Tomita Hideo

Принадлежит: Panasonic Corporation

A magnetic-field detection microcomputer includes: a magnetic-field detection device; a differential amplifier; a variable voltage circuit which generates a reference voltage that is variable; a comparator which compares an output from the differential amplifier with the reference voltage; a register which outputs a voltage control value to the variable voltage circuit; a ROM which previously store a first table in which a magnetic-field intensity and the voltage control value are associated with each other; and a CPU which sets, to the register, the voltage control value, and determines presence or absence of the magnetic-field intensity associated with the voltage control value based on a result of the comparison by the comparator and the first table. 1. A magnetic-field detection microcomputer comprising:a magnetic-field detection device which detects a magnetic field;a differential amplifier which amplifies an output voltage from the magnetic-field detection device;a variable voltage circuit which generates, according to a voltage control signal, a reference voltage that is variable;a comparator which compares an output from the differential amplifier with the reference voltage generated by the variable voltage circuit;a voltage controlling register which holds a voltage control value for controlling a level of the reference voltage generated by the variable voltage circuit, and outputs the voltage control signal having the voltage control value to the variable voltage circuit;a storage unit configured to previously store a first table in which a magnetic-field intensity indicating an intensity of the magnetic field to be applied to the magnetic-field detection device and the voltage control value are associated with each other; anda central processing unit (CPU) configured to set, to the voltage controlling register, the voltage control value corresponding to a magnetic field to be detected, and to determine presence or absence of the magnetic-field intensity ...

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Номер записи: 69

06-06-2013 дата публикации

SPIN-CURRENT EFFECT IN CARBON COATED CONDUCTORS

Номер: US20130140059A1

Автор: Koljonen Petteri, Saastamoinen Pekka

Принадлежит: SPINDECO OY

The present invention introduces a method and a structure for effectively generating spin currents in a metallic electric conductor. When, for example, a conductor manufactured from copper is evenly coated with a thin carbon layer, the internal direction of the magnetic axis, i.e. the spin, of the electrons acting as charge carriers can be polarized in such a way that the spins of the set of electrons align in the area of the interface between carbon and copper. This results in intensive generation of the spin current in the coated conductor. The generation of the spin current enables reduction of losses, shortening of delays relating to signal transfer and improvement of the general immunity to interferences. 1. A method for generating a spin current in an electric conductor , characterized in that the method comprises the steps:{'b': 1', '10', '2', '11', '1', '10, 'coating the electric conductor (, ) with a carbon layer (, ), the thickness of which is smaller than the diameter of the conductor material (, ); and'}{'b': 1', '10', '2', '11, 'setting an electric current to propagate in the electric conductor, whereby the spin current is formed in the environment of the interface between the electric conductor material (, ) and carbon (, ).'}2110. The method according to claim 1 , characterized in that the material of the electric conductor ( claim 1 , ) is copper.3211. The method according to claim 1 , characterized in that the carbon layer ( claim 1 , ) to be used in the method comprises graphene or a carbon nanotube structure.4211. The method according to claim 1 , characterized in that the thickness of the layer ( claim 1 , ) to be coated is between 10 nm and 100 μm.5110. The method according to claim 1 , characterized in that the electric conductor ( claim 1 , ) to be coated is a conductor on a printed circuit board claim 1 , a conductor in the internal circuitry of a component claim 1 , a conductor between different parts of a device or a conductor between ...

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Номер записи: 70

06-06-2013 дата публикации

MAGNETIC FIELD SENSOR

Номер: US20130141091A1

Автор: Delaet Bertrand, VIALA Bernard

Принадлежит: Commissariat A L'Energie Atomique Et Aux Energies Alternatives

A magnetic field sensor has a magnetoresistive rod having a stack of stacked layers that include a pinned layer having a fixed magnetization direction almost perpendicular to a longitudinal direction, a free layer comprising a magnetostrictive material having a coefficient of magnetostriction greater than 20 ppm to 25° C. and a longitudinal axis of easiest magnetization, the magnetization changing when the free layer is exposed to a magnetic field, a non-magnetic spacer layer interposed between the free and pinned layers to form a tunnel junction or spin valve, and a stress-generating layer for exerting uniaxial stress essentially such that a product of stress and magnetostriction coefficient is greater than 500 ppm·MPa at 25° C. The rod's length is at least ten times its greatest width. 1. An apparatus comprising a magnetic field sensor , said magnetic field sensor comprising a magnetoresistive rod comprising a stack having stacked layers , said stacked layers comprising a pinned layer having a fixed magnetization direction that is within ten degrees of being perpendicular to a longitudinal direction , a free layer comprising a magnetostrictive material having a coefficient of magnetostriction , the absolute value of which is greater than 20 ppm to 25° C. and having an axis of easiest magnetization that is parallel to said longitudinal direction , said free layer having a magnetization that changes when said free layer is subjected to a magnetic field to be measured , a non-magnetic spacer layer interposed between said free layer and said pinned layer to form one of a tunnel junction and a spin valve , and a stress-generating layer capable of exerting a uniaxial mechanical stress in a direction that is within ten degrees of being parallel to said longitudinal direction such that a product of said mechanical stress and said coefficient of magnetostriction is positive and greater than 500 ppm·MPa at 25° C. , said magnetoresistive rod having a length in a longitudinal ...

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Номер записи: 71

13-06-2013 дата публикации

Inductively interrogated passive sensor apparatus

Номер: US20130147470A1

Автор: Christopher D. Bartlett, Corey Jaskolski, Frank Borke, Gabriel Silva, John J. Mulholland

Принадлежит: FMC Technologies Inc

A sensor apparatus comprises a first magnetic transducer which in use is positioned on a first side of a barrier and a second magnetic transducer which in use is positioned on a second side of the barrier opposite the first side. The second transducer comprises a magnetic or electrical property which is dependent upon a sensible condition on the second side of the barrier, such as the pressure or temperature on the second side of the barrier. In operation, the first transducer generates a first magnetic field which induces the second transducer to generate a second magnetic field that is dependent upon the magnetic or electrical property of the second transducer. The first transducer detects the second magnetic field and generates a signal which is representative of the sensible condition on the second side of the barrier.

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Номер записи: 72

13-06-2013 дата публикации

Micro-Fabricated Atomic Magnetometer and Method of Forming the Magnetometer

Номер: US20130147472A1

Автор: Andrew James West, Byron Jon Roderick Shulver, Peter J. Hopper, Philipp Lindorfer, Roozbeh Parsa, William French

Принадлежит: Texas Instruments Inc

The cost and size of an atomic magnetometer are reduced by attaching a vapor cell structure that has a vapor cell cavity to a base die that has a laser light source that outputs light to the vapor cell cavity, and attaching a photo detection die that has a photodiode to the vapor cell structure to detect light from the laser light source that passes through the vapor cell cavity.

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Номер записи: 73

13-06-2013 дата публикации

Implementing spin-torque oscillator sensing with enhanced demodulator for hard disk drives

Номер: US20130148223A1

Автор: Bruce Alvin Gurney, Bruce Wilson, Neil Smith, Patrick Mesquita Braganca, Rehan Ahmed Zakai, Richard Leo Galbraith

Принадлежит: Hitachi Global Storage Technologies Netherlands BV

A method, apparatus, and system are provided for implementing spin-torque oscillator (STO) sensing with a demodulator for hard disk drives. The demodulator measures an instantaneous phase of the readback signal from a STO sensor and converts the readback signal into a signal that is proportional to the magnetic field affecting the STO frequency during a bit time. The converted signal is used for processing by conventional data detection electronics.

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Номер записи: 74

20-06-2013 дата публикации

TOROIDAL FLUXGATE CURRENT TRANSDUCER

Номер: US20130154629A1

Автор: Gery Gérard, Gudel Claude, Marcoz Benjamin, Richard Bernard

Принадлежит: LEM INTELLECTUAL PROPERTY SA

Toroidal fluxgate current transducer comprising a ring shaped fluxgate sensing unit () comprising a ring-shaped support (), a saturable magnetic core () mounted on the support (), an excitation coil () wound around the support and saturable core and a magnetic shell () mounted around the excitation coil, ring-shaped support and saturable core. The support is ringed-shape and comprises terminals () fixed to the support, a first pair of said terminals connected to ends of the excitation coil, and a second pair of said terminals connected to ends of a secondary coil of the current transducer. 115-. (canceled)16. Toroidal fluxgate current transducer comprising a ring shaped fluxgate sensing unit comprising a secondary coil made of a conducting wire , a ring-shaped dielectric support , a saturable magnetic core mounted on the support , an excitation coil made of a conducting wire wound around the support and saturable core , and a magnetic shell mounted around the excitation coil , ring-shaped support and saturable core , wherein the support comprises terminals fixed to the support , a first pair of said terminals connected to ends of the excitation coil , and a second pair of said terminals connected to ends of the secondary coil of the current transducer.17. Transducer according to claim 16 , further comprising a circuit board connected to said terminals of the sensing unit.18. Transducer according to claim 16 , wherein the sensing unit further comprises dielectric housing shells mounted around the excitation coil and saturable core and forming a support around which the secondary coil is wound.19. Transducer according to claim 18 , wherein the dielectric housing shells comprise a plurality of spaced apart radial fins.20. Transducer according to claim 18 , wherein the dielectric shell comprises protuberances engaging in complementary orifices in a circuit board of the transducer.21. Transducer according to claim 16 , wherein the ring-shaped dielectric support of the ...

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Номер записи: 75

27-06-2013 дата публикации

DLA ROTOR FLUX DESNITY SCAN METHOD AND TOOL

Номер: US20130162244A1

Автор: Rasokas Raymond, Weldon Craig Andrew

Принадлежит: CONTINENTAL AUTOMOTIVE SYSTEMS, INC.

A method of measuring flux density and run out to accommodate rotors of different diameters, evaluate intrinsic properties of magnet material and the magnetization process. Circular run out measurement capability is also used to evaluate bearing journal “ovality.” The method includes the use of a scan tool, or a DLA Rotor Flux Density Scan Fixture, which evaluates the electromagnetic field strength (gauss), combined with surface run out and presents the data in a scalable pictorial format. The scan tool includes a probe which measures a magnetic field strength and circular run out of the perimeter of the magnet. Simultaneously, a non-contact measurement sensor is used to measure the rotor surface for subtle variations. The resulting sine wave gauss data and the surface dimension data are manipulated into a scalable “radar” plot. The radar plot correlates magnetic pole field strength and surface circular run out variation to the index position. 1. A method for measuring the magnetic flux and run out of a surface , comprising the steps of:providing a digital linear actuator (DLA);providing a rotor, the rotor being part of the DLA;providing a magnet connected to and circumscribing the rotor, the magnet having an outer surface;providing a plot having the magnet flux density of the magnet, and the run out of the magnet;simultaneously measuring the run out and the magnet flux density of the rotor; andplotting the run out and the magnet flux density are together on the plot to correlate the measurements of the run out and the magnet flux density.2. The method for measuring the magnetic flux and run out of a surface of claim 1 , further comprising the steps of:providing a first section of the outer surface;providing a second section of the outer surface;providing a non-contact measurement sensor for measuring the run out on the first section of the outer surface of the magnet, and for measuring the run out on the second section of the outer surface of the magnet;providing a ...

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Номер записи: 76

27-06-2013 дата публикации

CURRENT DETECTING APPARATUS

Номер: US20130162246A1

Автор: Chaen Satoru, Nakajima Hirokatsu

Принадлежит: SUMITOMO WIRING SYSTEMS, LTD.

In a current detecting apparatus, a container member includes a substrate fixing portion, a core inner-edge positioning portions, and a lid member. The substrate fixing portion is a portion formed at a position outside an outer edge of a magnetic core, and to which a first portion of a circuit board is fixed. Two of the core inner-edge positioning portions come into contact with the magnetic core, and come into contact with the circuit board. The first portion, the second portion, and the third portion surround a magnetoelectric device, such as a Hall element, that detects a magnetic flux in a gap portion of the magnetic core. The lid-side substrate holding portion, with the container-side substrate holding portion, holds the circuit board tightly. 1. A current detecting apparatus comprising:a magnetic core formed of a magnetic material, having a first end, a second end, an inner edge, and an outer edge, the first end facing the second end and a gap portion being interposed between the first end and the second end, and the magnetic core being formed continuously so as to surround a periphery of a hollow portion of the magnetic core; a first portion,', 'a second portion, and', a first surface, and', 'a second surface, the first surface opposite to the second surface, and, 'a third portion, the first portion, the second portion and the third portion of the circuit board surrounding the magnetoelectric device, the first portion, the second portion and the third portion of the circuit board each including], 'a circuit board on which a magnetoelectric device configured to detect a magnetic flux in the gap portion of the magnetic core is mounted in an upright position, the circuit board including a container member;', 'a lid member, the container member and the lid member having insulating properties and being assembled together, the housing being configured to accommodate the magnetic core and the circuit board and to support the magnetic core and the circuit board in a ...

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Номер записи: 77

04-07-2013 дата публикации

Magnetic sensor

Номер: US20130168787A1

Автор: Kuei-Hung Shen

Принадлежит: Industrial Technology Research Institute ITRI

A magnetic sensor suitable for sensing an external magnetic field includes a magnetic tunnel junction (MTJ) device. The MTJ device is used to sense an out-of-plane (Z-axis) component of the external magnetic field at a perpendicular direction to the MTJ device. The MTJ device includes a first pinned magnetic layer, a tunnel layer and a magnetic sensing layer. The first pinned magnetic layer has a pinned magnetization perpendicular to the first pinned magnetic layer. The tunnel layer is disposed on the first pinned magnetic layer. The magnetic sensing layer is disposed on the tunnel layer. The magnetic sensing layer has a critical thickness to be at a superparamagnetic range, in which an out-of-plane (Z-axis) magnetic sensitivity is larger than an in-plane (X-axis, Y-axis) magnetic sensitivity. The first pinned magnetic layer, the tunnel layer and the magnetic sensing layer are stacked in a forward sequence or a reverse sequence.

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Номер записи: 78

04-07-2013 дата публикации

MAGNETIC FIELD OBSERVATION DEVICE AND MAGNETIC FIELD OBSERVATION METHOD

Номер: US20130174302A1

Автор: Saito Hitoshi, Yoshimura Satoru

Принадлежит: AKITA UNIVERSITY

A magnetic-field-observation device and method for measuring magnetic force near a magnetic material specimen's surface with high resolution and detecting the polarity of the magnetic pole of specimen's surface. The device including: a probe; excitation mechanism that excites it; scanning mechanism that relatively moves the probe and specimen; alternating magnetic field generation mechanism to make the probe periodically undergo magnetization reversal and apply thereto an alternating magnetic field having magnitude not making the specimen undergo magnetization reversal; and modulation measurement mechanism for measuring degree of periodical frequency modulation of the probe's oscillation caused by its apparent spring constant periodically changed by force of periodically changed intensity and applied to the probe by alternating force through magnetic interaction between magnetizations of the probe and specimen, by frequency demodulation or by measuring intensity of one sideband wave spectrum among spectrums generated by the frequency modulation. The method performed using the device. 1. A magnetic field observation device that observes a stray magnetic field from a magnetic material specimen , the magnetic field observation device comprising:a probe that has a magnetic moment which more easily undergoes magnetization reversal than the magnetic material specimen;an excitation mechanism that excites the probe;a scanning mechanism that relatively moves the probe and the magnetic material specimen to make the probe scan a surface of the magnetic material specimen;an alternating magnetic field generation mechanism that can make the probe periodically undergo magnetization reversal and that applies, to the probe, an alternating magnetic field having such a magnitude as not to make the magnetic material specimen undergo magnetization reversal; anda modulation measurement mechanism in which a degree of periodical frequency modulation of oscillation of the probe generated by ...

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Номер записи: 79

11-07-2013 дата публикации

METHOD OF ESTIMATING THE RESIDUAL MAGNETIC FLUX OF TRANSFORMER AND RESIDUAL MAGNETIC FLUX ESTIMATION DEVICE

Номер: US20130176021A1

Автор: Koshizuka Tadashi, MAEHARA Hiroyuki, SAITOH Minoru, Sato Yoshimasa, Udagawa Keisuke

Принадлежит:

A residual magnetic flux estimation device includes a DC power-source control device which controls a DC power source to apply a DC voltage across two terminals of a Δ connection that is a secondary winding or a tertiary winding, a voltage measuring device which measures a terminal voltage at the primary side of a three-phase transformer a computing device that determines a phase having a high voltage between the two phases other than the phase to which the voltage is applied, and a residual magnetic flux measuring device that measures a phase-to-phase residual magnetic flux between the two phases other than the high-voltage phase, and estimates a measured value of the phase-to-phase residual magnetic flux as a maximum residual magnetic flux in the measurement-target three-phase transformer. 1. A residual magnetic flux estimating method of a transformer , the method comprising:a step for applying, to a three-phase transformer having a primary winding connected to a Y connection and a secondary winding or a tertiary winding subjected to a Δ connection, a DC voltage to a phase connected between predetermined two terminals of the Δ connection;a step for measuring terminal voltages of two phases other than the phase to which the DC voltage is applied at a primary side of the three-phase transformer;a step for determining a phase having a higher measured terminal voltage as a high-voltage phase between the two phases where the terminal voltages are measured; anda step for measuring a phase-to-phase residual magnetic flux between the two phases other than the high-voltage phase and estimating the phase-to-phase residual magnetic flux as a maximum residual magnetic flux in the measurement-target three-phase transformer.2. A residual magnetic flux estimating method of a transformer , the method comprising:a step for applying, to a three-phase transformer having a primary winding connected to a Y connection and a secondary winding or a tertiary winding subjected to a Δ ...

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Номер записи: 80

11-07-2013 дата публикации

Detecting device, detecting system, power transmitting device, noncontact power transmission system, and detecting method

Номер: US20130176023A1

Автор: Shinji Komiyama

Принадлежит: Sony Corp

A detecting device includes a reading coil configured to read a magnetic flux generated by a detecting coil for detecting a magnetic field of an electromagnetic wave output from an exciting coil according to the magnetic field. The detecting device further includes a Q-value measuring section configured to measure a Q-value of the detecting coil on a basis of a temporal transition of oscillation of a voltage obtained in the reading coil according to the magnetic flux generated by the detecting coil.

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Номер записи: 81

18-07-2013 дата публикации

Sensor Package and Method for Producing a Sensor Package

Номер: US20130181703A1

Автор: Ausserlechner Udo

Принадлежит: INFINEON TECHNOLOGIES AG

Some embodiments herein relate to a sensor package. The sensor package includes a printed circuit board with a laminar current conductor arranged on a first main surface of the printed circuit board. The sensor package also includes a sensor chip adapted to measure a current flowing through the laminar current conductor, wherein the sensor chip comprises a magnetic field sensor. The sensor chip is electrically insulated from the current conductor by the printed circuit board, and is arranged on a second main surface of the printed circuit board opposite to the first main surface. The sensor chip is hermetically sealed between the mold material and the printed circuit board, or is arranged in the printed circuit board and hermetically sealed by the printed circuit board. 1. A sensor package , comprising:a current conductor;a sensor chip arranged adapted to measure a current flowing through the current conductor, the sensor chip comprising a magnetic field sensor; anda printed circuit board arranged between at least a part of the current conductor and at least a part of the sensor chip;wherein the sensor chip is sealed between a mold material and the printed circuit board, or wherein the sensor chip is sealed within the printed circuit board.2. The sensor package of claim 1 , wherein the sensor chip is flip-chip mounted or face-up mounted.3. The sensor package of claim 1 , wherein the sensor chip is arranged on a main surface of the printed circuit board claim 1 , and wherein the main surface of the printed circuit board comprises alignment structures or alignment marks for aligning of the sensor chip.4. The sensor package according to claim 1 , wherein the current conductor comprises a laminar current conductor.5. The sensor package according to claim 1 , wherein the current conductor comprises a planar current conductor.6. The sensor package according to claim 1 , wherein the lateral dimensions of the current conductor are larger than the vertical dimension of the ...

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Номер записи: 82

18-07-2013 дата публикации

MAGNETIC SENSOR FOR IMPROVING HYSTERESIS AND LINEARITY

Номер: US20130181704A1

Автор: ANDO Hideto, OBANA Masayuki, Sugihara Shinji

Принадлежит: ALPS ELECTRIC CO., LTD.

A magnetic sensor includes a non-bias structure element section that has a laminated structure in which a fixed magnetic layer, a non-magnetic material layer, a free magnetic layer, and a protection layer are laminated, and that is extended in an X1-X2 direction; and soft magnetic bodies that are arranged on the element section in a contactless manner. The soft magnetic bodies include a first section, a second section, and a third section. The second section is located on a Y2 side of the element section and the third section is located on a Y1 side thereof. The second section of one of soft magnetic bodies faces the third section of the other soft magnetic body in a Y1-Y2 direction through the element section. An electrode layer is provided on the element section which faces the joint sections of the second section and the third section in the Y1-Y2 direction. 1. A magnetic sensor comprising:a non-bias structured element section that has a laminated structure in which, from a bottom, a fixed magnetic layer, a non-magnetic material layer, a free magnetic layer, and a protection layer are laminated in order or in which, from the bottom, the free magnetic layer, the non-magnetic material layer, the fixed magnetic layer, and the protection layer are laminated in order, and that is formed in such a way as to be extended in an X1-X2 direction; anda plurality of soft magnetic bodies that are arranged on the element section in a contactless manner,wherein a sensitivity axis direction of the element section is a Y1-Y2 direction which is perpendicular to the X1-X2 direction,wherein each of the soft magnetic bodies is extended in the Y1-Y2 direction, and includes a first section which faces the element section in a thickness direction in a contactless manner, a second section which is extended from a Y2 side end portion of the first section to the X1 direction and is arranged on the Y2 side of the element section in a plan view, and a third section which is extended from a Y1 ...

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Номер записи: 83

25-07-2013 дата публикации

MULTIPOLAR ENCODER FOR POSITION SENSORS, AND DETECTION DEVICE INCLUDING SUCH AN ENCODER COMBINED WITH AT LEAST ONE POSITION SENSOR

Номер: US20130187640A1

Автор: Corona Jérôme

Принадлежит: ELECTRICFIL AUTOMOTIVE

A position sensor coder of the type comprising a multipolar magnetic annulus () provided at its circumference with poles having polarities of opposite signs, the coder including at least one mark zone (Pi) presenting an angular width (Li) greater than the angular width of each of the alternating poles situated outside said zone around the circumference of the annulus, the coder being characterized in that said mark zone (Pi) comprises two adjacent singular poles (Ni, Si) presenting polarities of opposite signs and placed in the continuity of pole alternation in the annulus () and of angular width that is greater than the angular width of the poles lying outside the mark zone, the magnetization within the singular poles varying gradually in continuous manner between the two ends of the mark zone. 1232. A position sensor coder of the type comprising a multipolar magnetic annulus () provided at its circumference with poles having polarities of opposite signs that are placed in alternating manner and that are designed to travel past a measurement cell () that delivers a differential periodic signal corresponding to the variation in the intensity of the magnetic field delivered by the poles , the coder including at least one mark zone (Pi) presenting an angular width (Li) greater than the angular width of each of the alternating poles situated outside said zone around the circumference of the annulus , the coder being characterized in that said mark zone (Pi) comprises two adjacent singular poles (Ni , Si) presenting polarities of opposite signs and placed in the continuity of pole alternation in the annulus () and of angular width that is greater than the angular width of the poles lying outside the mark zone , the magnetization within the singular poles varying gradually in continuous manner between the two ends of the mark zone.2. A position sensor coder according to claim 1 , characterized in that the junction between the two singular poles (Ni claim 1 , Si) is ...

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Номер записи: 84

25-07-2013 дата публикации

MAGNETORESISTOR INTEGRATED SENSOR FOR MEASURING VOLTAGE OR CURRENT, AND DIAGNOSTIC SYSTEM

Номер: US20130187645A1

Автор: Fermon Claude, Giraud Alain, Pannetier-Lecoeur Myriam, Roy Francis

Принадлежит: PEUGEOT CITROEN AUTOMOBILES SA

The invention relates to an integrated sensor, including terminals () for connection to an electric generator, said terminals being connected to a metal measuring line () in which a current proportional to the voltage or current of the generator to be measured flows, and magnetoresistors (). The metal measuring line includes elongate and parallel sections () in which the current flows in opposite directions, said sections being connected to a portion () for closing the metal measuring line (), which is arranged on a galvanic isolation layer () that is in turn arranged on an integrated circuit portion including the magnetoresistors (), each of which have a sensitive portion that is vertically adjacent to one of the elongate sections (). The sensor can be integrated into a diagnostic system. 1. A magnetoresistor integrated sensor for measuring voltage or current , comprising first and second terminals for connection to a generator for which the voltage or current is to be measured , linked to a metal measuring line through which flows a current proportional to the voltage or current of the generator which is to be measured , and at least two magnetoresistors for measuring the magnetic field created remotely by said current flowing through such measuring line ,wherein the metal measuring line includes at least first and second elongated and parallel sections through which the current flows in opposite directions, connected to a section aimed at closing the measuring line, with the metal measuring line unit being arranged on one of the faces of an integrated galvanic isolation layer for voltages higher than or equal to 1500 V, with said integrated galvanic isolation layer being itself arranged on a section of the integrated detection circuit, said portion of the integrated detection circuit includes at least two magnetoresistors which themselves each have a sensitive section that is essentially superimposed onto one of the elongated sections of the metal measuring line ...

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Номер записи: 85

01-08-2013 дата публикации

Detection of a Metal or Magnetic Object

Номер: US20130193959A1

Автор: Albrecht Andrej, Zibold Tobias

Принадлежит:

A measuring device for detecting a metal object includes two emission coils configured to produce superimposed magnetic fields, a receiving coil in the region of both magnetic fields, and a control device configured to control the emission coils such that a value of a voltage, which is clock synchronized with alternating voltages and which is induced in the emission coils, is minimized. The control device is configured to detect the metal object when a ratio of the alternating voltages does not correspond to a ratio of distances between the receiving coils and the emission coils. 1. A measuring device for detecting a metallic object comprising:two transmitting coils configured to generate superimposed magnetic fields;a receiving coil arranged in an area of the magnetic fields; anda control device configured to supply the transmitting coils with alternating voltages such that a value of a voltage, which is clock-pulse synchronized with the alternating voltages and which is induced in the receiving coil, is minimized, wherein the control device is configured to detect the metallic object when a ratio of the alternating voltages does not correspond to a ratio of distances of the receiving coil from the transmitting coils.2. The measuring device as claimed in claim 1 , wherein the alternating voltages are mutually phase-shifted to change the magnetic fields periodically in value and phase.3. The measuring device as claimed in claim 1 , wherein the receiving coil is arranged symmetrically between the transmitting coils.4. The measuring device as claimed in claim 3 , wherein:at least one further receiving coil is arranged in the area of the magnetic fields; andthe control device is configured to supply the transmitting coils with voltage alternatingly based on a voltage induced in the receiving coil and a voltage induced in the further receiving coil.5. The measuring device as claimed in claim 4 , further comprising an evaluating device configured to determine at least ...

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Номер записи: 86

01-08-2013 дата публикации

Sensing fiber, coil of sensing fiber, and all-fiber current sensor

Номер: US20130195395A1

Автор: Yong Huang

Принадлежит: Individual

Embodiments of the present invention provide a sensing fiber, which includes a polarization-maintaining (PM) fiber being spun around a core thereof to have a first, a second, and a third sections, wherein the first section has an increasing rate of spin from a predetermined slow rate to a predetermined fast rate; the second section is spun at the predetermined fast rate; and the third section has a decreasing rate of spin from the predetermined fast rate to the predetermined slow rate. The first and third sections have a substantially same length and changes in rate of spin are substantially symmetric to each other. Embodiments of the present invention also provide a fiber coil made by the sensing fiber, with the first section and the third section being substantially overlapped along the coil, and provide an all-fiber current sensor employing the fiber coil.

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Номер записи: 87

08-08-2013 дата публикации

MAGNETIC FIELD SENSOR

Номер: US20130200883A1

Автор: Mehnert Walter, Theil Thomas

Принадлежит:

A magnetic field sensor for a position transducer having processing and control electronics for outputtomg signals of the magnetic field sensor and a permanent magnet exciter array has at least three Hall elements for registering the magnetic field direction of the permanent magnet array. The Hall elements are formed and arranged on a semiconductor IC and spaced in such a manner that their active surfaces lie in a common plane parallel to the surface of the semiconductor IC. A single deflecting body made of ferromagnetic material is is produced and installed as an independent component separate from the semiconductor IC, and the mutual distances of the Hall elements on the surface of the semiconductor IC comprise a multiple of the maximum dimensional extent of the Hall elements. 1. Magnetic field sensor , comprising:at least three Hall elements for a position transducer, the Hall elements being formed and located with mutual distances on a semiconductor integrated circuit such that their active surfaces lie in a common plane parallel to an upper surface of the semiconductor integrated circuit,processing and control electronics for outputting signals of the magnetic field sensor,a permanent magnet exciter array, a magnetic field direction of which is to be detected by means of the Hall elements, anda single deflecting body made of a ferromagnetic material, arranged such that field lines emanating from the permanent magnet exciter array, which, in the absence of the deflecting body, would run parallel to the common plane of the active surfaces of the Hall elements, receive at least one directional component perpendicularly penetrating the active surfaces,wherein the deflecting body is produced and installed as an independent component separate from the semiconductor integrated circuit, and that the mutual distances of the Hall elements on the surface of the semiconductor integrated circuit are a multiple of a maximum dimensional extent of the Hall elements themselves. ...

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Номер записи: 88

15-08-2013 дата публикации

Hall effect current sensor for medium-voltage applications

Номер: US20130207640A1

Автор: Peter Willard Hammond

Принадлежит: Siemens Industry Inc

A current sensor for measuring medium-voltage currents. The current sensor includes an input terminal configured to receive a current, an output terminal configured to transmit the current, a closed core made from a magnetic material and comprising a gap, at least one conductor operably connected to the input terminal and the output terminal and passing through the closed core, the at least one conductor sized to carry the current, and a molded case of solid dielectric material configured to encapsulate the closed core and the at least one conductor, wherein the gap and the terminals are not encapsulated by the molded case. The molded case is dimensioned such that internal and external spacings defined by the molded case are suitable for continuous operation with a medium voltage current as applied to the terminals and the at least one conductor while the core is at ground potential.

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Номер записи: 89

15-08-2013 дата публикации

Magnetic sensor apparatus

Номер: US20130207646A1

Автор: Xiao-Qiao KONG

Принадлежит: Isentek Inc

A magnetic sensor apparatus includes a substrate, a plurality of magnetoresistance sensor units, a reset coil and a compensation coil. The magnetoresistance sensor units are disposed on the substrate. The reset coil is disposed over the magnetoresistance sensor units for introducing a resetting current, and a magnetic field generated from this resetting current can be used to reset magnetization directions of the magnetoresistance sensor units. The reset coil includes a plurality of first main segments. The compensation coil is disposed over the magnetoresistance sensor units for introducing a compensating current, and another magnetic field generated from the compensating current is used as a compensation magnetic field onto the magnetoresistance sensor units. The compensation coil includes a plurality of second main segments. The first main segments of the reset coil are perpendicular to the second main segments of the compensation coil.

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Номер записи: 90

15-08-2013 дата публикации

OPTICALLY PUMPED MAGNETOMETER AND MAGNETIC SENSING METHOD

Номер: US20130207649A1

Автор: Kobayashi Tetsuo, Mizutani Natsuhiko

Принадлежит: CANON KABUSHIKI KAISHA

An optically pumped magnetometer and a magnetic sensing method acquire information as to strengths of magnetic fields in two different directions. A pump light having a circularly polarized component, first probe light having a liner polarized component and second probe light having a linearly polarized component are emitted to a cell containing a group of alkali metal atoms so as to form a crossing region A magnetic field applying unit applies a static magnetic field in a direction of the pump light incident on the crossing region during the emission of the pump light, the first probe light and the second probe light. And, information as to strengths of magnetic fields in two different directions perpendicular to the direction of the static magnetic field in the cell from the rotation angles of a polarization planes of the first and second probe lights during passage through the cell is calculated. 1. An optically pumped magnetometer acquiring an information as to strengths of magnetic fields in different two directions comprising:a cell including a group of alkali metal atoms;a pump light optical system configured to direct a pump light containing a circularly polarized component incident in the cell;a first probe light optical system configured to direct a first probe light containing a linearly polarized component so as to cross the pump light within the cell;a second probe light optical system configured to direct a second probe light containing a linearly polarized component so as to cross the pump light and the first probe light within the cell;a first detector configured to detect a rotation angle of the plane of polarization of the first probe light after passing through the cell;a second detector configured to detect a rotation angle of the plane of polarization of the second probe light after passing through the cell;a magnetic field applying unit configured to apply a static magnetic field within the cell; anda calculating unit configured to calculate ...

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Номер записи: 91

15-08-2013 дата публикации

MAGNETIC FIELD SENSOR AND METHOD FOR MANUFACTURING A MAGNETIC FIELD SENSOR

Номер: US20130207650A1

Автор: Koop Paul

Принадлежит: ROBERT BOSCH GMBH

A magnetic field sensor includes: a circuit board having a first surface, a second surface opposite to the first surface, and a recess extending from the first surface to the second surface; a Hall sensor component having a Hall sensor situated in a housing, the Hall sensor component having an active sensor area situated parallel to the first surface and in the area of the recess on the side of the second surface on the circuit board; and a first magnetic flux concentrator made of a magnetically permeable material and situated on the side of the first surface opposite to the Hall sensor component, the magnetic flux concentrator having a lateral surface which faces away from the circuit board and includes a first surface area and a lateral surface which faces toward the circuit board and includes a second surface area which is smaller than the first surface area. 1. A magnetic field sensor , comprising:a circuit board having a first surface, a second surface opposite to the first surface, and a recess extending from the first surface to the second surface;a Hall sensor component having a housing and at least one Hall sensor situated in the housing, wherein the Hall sensor has an active sensor area which is situated parallel to the first surface and in the area of the recess on the side of the second surface on the circuit board; anda first magnetic flux concentrator made of a magnetically permeable material and situated on the side of the first surface on the circuit board opposite to the Hall sensor component, wherein the first magnetic flux concentrator has a first lateral surface which faces away from the circuit board and includes a first surface area and a second lateral surface which faces toward the circuit board and includes a second surface area, and wherein the first surface area is greater than the second surface area.2. The magnetic field sensor as recited in claim 1 , wherein the first magnetic flux concentrator has a trapezoidal cross-sectional area.3. ...

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Номер записи: 92

15-08-2013 дата публикации

FLUXGATE SENSOR

Номер: US20130207651A1

Автор: FIDLER Florian, Lother Steffen, Radestock Oliver, Rückert Martin

Принадлежит:

A fluxgate sensor has a driver coil, a signal coil, and a magnetic core that magnetically couples the driver coil and the signal coil. A magnetic field detector that can be positioned in a remote area is provided. The magnetic field detector is connected to a magnetic field generator positioned in the vicinity of the magnetic core by a transmission line, where the magnetic field of the magnetic field generator is superposed with the driver field. 11103035673561113127. A fluxgate sensor ( , , ) comprising a driver coil ( , ) , a signal coil () and a magnetic core () , via which the driver coil ( , ) and the signal coil () are magnetically coupled , characterized in that a magnetic field detecting means () is provided that can be positioned in a remote area and is connected by means of a transmission line () to a magnetic field outputting means () that is positioned in the vicinity of the magnetic core () and whose magnetic field is superposed with the driver field.211030. The fluxgate sensor ( claim 1 , claim 1 , ) as claimed in claim 1 ,{'b': '13', 'characterized in that the transmission line () is a flux conductor.'}311030. The fluxgate sensor ( claim 1 , claim 1 , ) as claimed in claim 1 ,{'b': '13', 'characterized in that the transmission line () is an electric signal line.'}411030. The fluxgate sensor ( claim 1 , claim 1 , ) as claimed in one of the preceding claims claim 1 ,{'b': 11', '12, 'characterized in that the magnetic field detecting means () and/or the magnetic field outputting means () are/is of inductive design.'}511030. The fluxgate sensor ( claim 4 , claim 4 , ) as claimed in claim 4 ,{'b': 11', '12, 'characterized in that the magnetic field detecting means () and the magnetic field outputting means () are designed as coils.'}611030. The fluxgate sensor ( claim 4 , claim 4 , ) as claimed in one of the preceding claims claim 4 ,{'b': 12', '31', '7, 'characterized in that the magnetic field outputting means () comprises a coupling core () that forms a ...

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Номер записи: 93

22-08-2013 дата публикации

MAGNETIC SENSOR DEVICE

Номер: US20130214772A1

Автор: MURAOKA Daisuke

Принадлежит: SEIKO INSTRUMENTS INC.

Provided is a magnetic sensor device, which is configured to connect each terminal of a Hall element to another end of a variable resistor having one end connected to GND by switching of four switches. Thus, a detection voltage level for a magnetic field intensity can be arbitrarily set with a small-scale circuit. The detection voltage level is determined only by the resistance ratio, and hence the influence of fluctuations in power supply voltage and manufacturing fluctuations can be suppressed. This configuration can simplify signal processing and achieve higher-speed signal processing. 1. A magnetic sensor device for generating an output in accordance with a magnetic field intensity applied to a magnetoelectric conversion element ,the magnetic sensor device comprising:a first switch and a second switch each including one end connected to a power source;a third switch and a fourth switch each including one end connected to a ground potential;a comparator including a first input terminal, a second input terminal, and an output terminal;a fifth switch and a sixth switch each including one end connected to the first input terminal of the comparator;a seventh switch and an eighth switch each including one end connected to the second input terminal of the comparator;a variable resistor including one end connected to the ground potential;a ninth switch, a tenth switch, an eleventh switch, and a twelfth switch each including one end connected to another end of the variable resistor; anda bridge circuit as an equivalent circuit of the magnetoelectric conversion element, the bridge circuit comprising a first resistor, a second resistor, a third resistor, and a fourth resistor,wherein a contact between the fourth resistor and the first resistor is connected to another end of the first switch, another end of the fifth switch, and another end of the tenth switch, a contact between the first resistor and the second resistor is connected to another end of the second switch, ...

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Номер записи: 94

22-08-2013 дата публикации

GAS CELL AND MAGNETIC FIELD MEASURING APPARATUS

Номер: US20130214773A1

Автор: UENO Hitoshi

Принадлежит: SEIKO EPSON CORPORATION

A gas cell used for a magnetocardiograph that measures a magnetic field generated from a living body (magnetocardiography) and a magnetoencephalograph that measures a magnetic field generated from a brain (magnetoencephalography). 1. A gas cell comprising:wall surfaces forming a closed space;a carbon film formed on inner walls of the wall surfaces; andatoms enclosed in the closed space, excited by light, and spin-polarized.2. The gas cell according to claim 1 , wherein the carbon film includes diamond-like carbon.3. The gas cell according to claim 1 , wherein a surface of the carbon film is terminated by hydrogen or deuterium.4. A magnetic field measuring apparatus comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'the gas cell according to ;'}an irradiation unit that applies light to the gas cell; anda detection unit that detects a rotation angle of a polarization plane of the light transmitted through the gas cell.5. A magnetic field measuring apparatus comprising:{'claim-ref': {'@idref': 'CLM-00002', 'claim 2'}, 'the gas cell according to ;'}an irradiation unit that applies light to the gas cell; anda detection unit that detects a rotation angle of a polarization plane of the light transmitted through the gas cell.6. A magnetic field measuring apparatus comprising:{'claim-ref': {'@idref': 'CLM-00003', 'claim 3'}, 'the gas cell according to ;'}an irradiation unit that applies light to the gas cell; anda detection unit that detects a rotation angle of a polarization plane of the light transmitted through the gas cell.7. The magnetic field measuring apparatus according to claim 4 , further comprising a heating unit that heats the gas cell to a predetermined temperature lower than an upper temperature limit of the carbon film.8. The magnetic field measuring apparatus according to claim 5 , further comprising a heating unit that heats the gas cell to a predetermined temperature lower than an upper temperature limit of the carbon film.9. The magnetic field ...

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Номер записи: 95

22-08-2013 дата публикации

Circuits And Methods Using Adjustable Feedback For Self-Calibrating Or Self-Testing A Magnetic Field Sensor With An Adjustable Time Constant

Номер: US20130214774A1

Автор: Hernan D. Romero, Juan Manuel Cesaretti

Принадлежит: Allegro Microsystems LLC

A magnetic field sensor includes a reference-field-sensing circuit channel that allows a self-test or a self-calibration of the circuitry of the magnetic field sensor. The self-test or the self calibration can have at least two different bandwidths that provide a respective at least two different rates of self-test or self-calibration.

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Номер записи: 96

22-08-2013 дата публикации

SEMICONDUCTOR INTEGRATED CIRCUIT, MAGNETIC DETECTING DEVICE, ELECTRONIC COMPASS, AND AMMETER

Номер: US20130214777A1

Автор: Itoi Kazuhisa

Принадлежит: FUJIKURA LTD.

A semiconductor integrated circuit includes a clock-signal control circuit controlling intensity-signal output, which is output from a signal processing circuit, to be stopped in at least a forward outage time and a backward outage time. The forward outage time is previous to an apex point of a triangular wave and having 1 to 5% of a triangular wave period. The backward outage time is subsequent to the apex point of the triangular wave and having 1 to 5% of a triangular wave period. 1. A semiconductor integrated circuit comprising:a clock-signal generation circuit;a signal processing circuit outputting an intensity signal corresponding to an intensity of an external magnetic field based on a time interval between a first spike-shaped voltage waveform and a second spike-shaped voltage waveform in accordance with a clock signal output from the clock-signal generation circuit, the second spike-shaped voltage waveform being detected subsequent to the first spike-shaped voltage waveform, the second spike-shaped voltage waveform having an inverse sign to that of the first spike voltage waveform; anda clock-signal control circuit controlling intensity-signal output, which is output from the signal processing circuit, to be stopped in at least a forward outage time and a backward outage time, the forward outage time being previous to an apex point of a triangular wave and having 1 to 5% of a triangular wave period, the backward outage time being subsequent to the apex point of the triangular wave and having 1 to 5% of a triangular wave period.2. The semiconductor integrated circuit according to claim 1 , whereinthe semiconductor integrated circuit is used for a flux-gate magnetic sensor having a magnetic core, an excitation unit varying magnetic flux of the magnetic core, and a detecting coil detecting the magnetic flux of the magnetic core, andthe magnetic sensor provides a triangular wave current to the excitation unit as an excitation current, detects the first spike- ...

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Номер записи: 97

22-08-2013 дата публикации

APPARATUS AND METHOD FOR REDUCING A TRANSIENT SIGNAL IN A MAGNETIC FIELD SENSOR

Номер: US20130214778A1

Автор: Chen Weihua, WARD MICHAEL G.

Принадлежит: Allegro Microsystems, LLC

A magnetic field sensor includes a compensation loop coupled in series with normal circuit couplings in order to reduce a transient signal that would otherwise be generated when the magnetic field sensor experiences a high rate of change of magnetic field. In some embodiments, the magnetic field sensor is a current sensor responsive to a magnetic field generated by a current-carrying conductor. 1. A magnetic field sensor , comprising:a lead frame comprising: a base plate, a ground pin coupled to the base plate, and a signal output pin;a circuit die disposed upon the base plate, the circuit die comprising one or more circuit conductive traces coupled in series between the around pin and the signal output pin;a circuit loop comprising a conductive path between the ground pin and the signal output pin, wherein the conductive path comprises the one or more circuit conductive traces, wherein the circuit loop has a circuit loop interior area;a compensated signal output node coupled to the signal output pin; and 'a compensation loop coupled in a series arrangement with the circuit loop, wherein the compensation loop has a compensation loop interior area, wherein the compensation loop interior area is selected to be related to the interior area of the circuit loop, wherein a path traversing the circuit loop in a direction from a first end of the series arrangement to a second end of the series arrangement has a circuit loop rotation direction opposite from a compensation loop rotation direction traversing the compensation loop along the same path, and wherein the compensation loop interior area and the compensation loop rotation direction are selected to result in a reduction of an overshoot or an undershoot of an output signal at the compensated signal output node resulting from the circuit loop experiencing a rapid change in flux of the magnetic field.', 'a conductive structure, comprising2. The magnetic field sensor of claim 1 , further comprising a circuit board within ...

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Номер записи: 98

29-08-2013 дата публикации

Electronic Device and Method for Start-Up of an Electronic Device

Номер: US20130221759A1

Автор: Dieterle Roland, Girardey Romuald, Schlachter Marc

Принадлежит: ENDRESS + HAUSER GMBH + CO KG

An electronic device, comprising: a housing having at least one chamber; a magnetic element guideway for accommodating and guiding a magnetic element, wherein the magnetic element guideway enables positioning of an accommodated magnetic element in at least two magnetic element positions relative to the housing. A control and evaluation circuit is arranged in the chamber and has two Hall sensors for registering at least one component of a first local magnetic field at the respective site of the first Hall sensor and for the providing, in each case, a signal, which depends on the local magnetic field registered at the first site. The two Hall sensors have relative to the housing, in each case, a defined position, wherein the control circuit is suitable based on the signals to detect whether a magnetic element is present in the magnetic element guideway, and in case yes, based on at least one of the signals, to detect whether the magnetic element is located in the first defined magnetic element position or has been moved from this position. 113-. (canceled)14. An electronic device , comprising:a housing, which has at least one chamber in its interior;a magnetic element guideway for accommodating and guiding a magnetic element, wherein the magnetic element guideway enables positioning of an accommodated magnetic element in at least two defined magnetic element positions relative to the housing;a magnetic element; anda control and evaluation circuit, which is arranged in the chamber and has a first Hall sensor for registering at least one component of a first local magnetic field at the site of said first Hall sensor and for providing a first signal, which depends on the local magnetic field registered at the first site, wherein the first Hall sensor has a first defined position relative to the housing; anda second Hall sensor for registering at least one component of a second local magnetic field at the site of said second Hall sensor and for providing a second signal, ...

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Номер записи: 99

05-09-2013 дата публикации

Method for measuring current in an electric network

Номер: US20130229173A1

Автор: Paul Bertrand

Принадлежит: SMARTFUTURE SAS

A method for measuring current in an electric network comprising at least one first electric line. The method includes fitting the first line with a circuit breaker having a protection coil and having a wall traversed by a magnetic field emitted by the protection coil; arranging on the wall of the circuit breaker a synchronous three-axis digital magnetometer on a semiconductor chip; by way of the digital magnetometer, measuring at least one component of a magnetic field emitted by the coil; and determining the value of a current traversing the electric line from the measured component.

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Номер записи: 100