Semiconductor Type Solid-state Or Magnetoresistive Magnetometers Patents (Class 324/252)
  • Patent number: 10732232
    Abstract: Provided is a magnetic field detection device that includes a first soft magnetic body and a magnetic detector. The first soft magnetic body includes a first plate and a first protrusion. The first plate includes a first surface including a first outer edge. The first protrusion is provided at a first arrangement position in the first surface and includes a first tip on opposite side to the first surface. The first arrangement position is set back from the first outer edge. The magnetic detector is provided in the vicinity of the first tip.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: August 4, 2020
    Assignee: TDK CORPORATION
    Inventors: Masaki Nagata, Kazuya Watanabe, Keisuke Uchida, Kohei Honma, Hiraku Hirabayashi
  • Patent number: 10718830
    Abstract: A magnetoresistive sensor is provided. The magnetoresistive sensor comprises a magnetic sensing layer, a magnetic reference layer, and a tunnel barrier layer between the magnetic sensing layer and the magnetic reference layer. The magnetoresistive sensor also comprises a sensing exchange layer having a layer of anti-ferromagnetic material. The sensing exchange layer is exchange coupled with the magnetic sensing layer. Also, the magnetoresistive sensor still further comprises a reference exchange layer having a layer of anti-ferromagnetic material. The reference exchange layer is exchange coupled with the magnetic reference layer.
    Type: Grant
    Filed: June 8, 2016
    Date of Patent: July 21, 2020
    Assignee: INL-INTERNATIONAL IBERIAN NANOTECHNOLGY LABORATORY
    Inventors: Ricardo Alexandre de Matos Antunes Ferreira, Elvira Pérez de Colosia Paz
  • Patent number: 10712178
    Abstract: A position detection device includes a first magnetic field generation unit for generating a first magnetic field, a second magnetic field generation unit for generating a second magnetic field, and a magnetic sensor. The position of the second magnetic field generation unit relative to the first magnetic field generation unit is variable. The magnetic sensor detects the direction of a target magnetic field at a detection position in a reference plane. The target magnetic field is a composite magnetic field of first and second magnetic field components which are respective components of the first and second magnetic fields parallel to the reference plane. The magnetic sensor includes a magnetoresistive element including a free layer and a magnetization pinned layer. In the reference plane, two directions orthogonal to the magnetization direction of the magnetization pinned layer are each different from both of directions of the first and second magnetic field components.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: July 14, 2020
    Assignee: TDK CORPORATION
    Inventors: Keisuke Uchida, Tsuyoshi Umehara, Toshihide Suto, Hiraku Hirabayashi
  • Patent number: 10712369
    Abstract: Embodiments of the present disclosure provide mechanisms for measuring currents flowing in one or more conductor wires. The mechanisms are based on using magnetic sensor pairs arranged within a housing with an opening for the wires, where each magnetic sensor pair can generate a pair of signals indicative of magnetic fields in two different directions. The outputs of the sensor pairs can be used to derive a measure of current(s) flowing through the one or more wires. The use of magnetic sensor pairs that can measure magnetic field in two different directions may enable simultaneous current measurement in multiple wires placed within the opening, improve accuracy of current measurements while relaxing requirements for precise control of the placement of the wire(s), reduce the impact of stray magnetic interference, and enable both AC and DC measurements.
    Type: Grant
    Filed: June 8, 2018
    Date of Patent: July 14, 2020
    Assignee: ANALOG DEVICES GLOBAL UNLIMTED COMPANY
    Inventors: Boris Lerner, Yogesh Jayaraman Sharma, Sefa Demirtas, Jochen Schmitt, Paul Blanchard, Arthur J. Kalb, Harvey Weinberg, Jonathan Ephraim David Hurwitz
  • Patent number: 10697799
    Abstract: An angle sensor includes a plurality of composite magnetic field information generation units and an angle computing unit. The plurality of composite magnetic field information generation units detect, at a plurality of detection positions, a composite magnetic field of a magnetic field to be detected and a noise magnetic field other than the magnetic field to be detected, and thereby generate a plurality of pieces of composite magnetic field information including information on the direction of the composite magnetic field. The angle computing unit generates a detected angle value by performing an operation using the plurality of pieces of composite magnetic field information so that an error of the detected angle value caused by the noise magnetic field is made smaller than in the case where the detected angle value is generated on the basis of any and only one of the plurality of pieces of composite magnetic field information.
    Type: Grant
    Filed: December 10, 2019
    Date of Patent: June 30, 2020
    Assignee: TDK CORPORATION
    Inventors: Kenkichi Anagawa, Shinichirou Mochizuki, Hiraku Hirabayashi, Kazuya Watanabe
  • Patent number: 10684310
    Abstract: A magnetic field transducer mounting apparatus can include a first mount configured to fixedly couple to a side surface of a wafer test fixture magnet, and a second and third mount configured to adjustably position a magnetic field transducer in a predetermined location proximate a face of the wafer test fixture magnet.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: June 16, 2020
    Assignee: Spin Memory, Inc.
    Inventors: Danny Yam, Jorge Vasquez, Georg Wolf, Roberto Cordero
  • Patent number: 10677860
    Abstract: A magnetic sensor includes a magnetoresistive body that is disposed over a surface of an insulator, a protective film that is provided over a surface of the insulator, including over the magnetoresistive body, and an open portion that runs along at least a portion of a perimeter of the magnetoresistive body and penetrates the protective film in a thickness direction of the protective film. In the magnetic sensor, a separation distance between an inside wall of the open portion and the magnetoresistive body, this being a minimum distance with respect to the magnetoresistive body, is configured so as to be longer than an alignment margin dimension of the open portion with respect to the magnetoresistive body.
    Type: Grant
    Filed: August 29, 2018
    Date of Patent: June 9, 2020
    Assignee: KABUSHIKI KAISHA TOKAI-RIKA-DENKI-SEISAKUSHO
    Inventor: Yoichi Ishizaki
  • Patent number: 10670671
    Abstract: Sensor devices, systems and methods are provided, including a first magnetic sensor configured to measure a first magnetic field in a first frequency range and output a first sensor signal based on the measured first magnetic field, a second magnetic sensor configured to measure a second magnetic field in a second frequency range and output a second sensor signal based on the measured second magnetic field, and a sensor circuit configured to receive the first and the second sensor signals, combine the first and the second sensor signals, and output a combined sensor signal. The first magnetic sensor and the second magnetic sensor are configured to share a cross-over frequency.
    Type: Grant
    Filed: December 5, 2017
    Date of Patent: June 2, 2020
    Assignee: Infineon Technologies AG
    Inventor: Udo Ausserlechner
  • Patent number: 10650849
    Abstract: An exchange-coupled film according to the present invention includes an antiferromagnetic layer, pinned magnetic layer, and free magnetic layer which are stacked. The antiferromagnetic layer is composed of a Pt—Cr sublayer and an X—Mn sublayer (where X is Pt or Ir). The X—Mn sublayer is in contact with the pinned magnetic layer. The Pt—Cr sublayer has a composition represented by the formula Pt?Cr100 at %-? (? is 44 at % to 58 at %) when the X—Mn sublayer is placed on the Pt—Cr sublayer or has a composition represented by the formula Pt?Cr100 at %-? (? is 44 at % to 57 at %) when the X—Mn sublayer is placed on the pinned magnetic layer.
    Type: Grant
    Filed: February 11, 2019
    Date of Patent: May 12, 2020
    Assignee: ALPS ALPINE CO., LTD.
    Inventors: Masamichi Saito, Fumihito Koike, Hiroaki Endo
  • Patent number: 10613161
    Abstract: A magnetic sensor includes an MR element and two stacks. The two stacks are spaced apart from each other along a first direction. Each stack includes a ferromagnetic layer and an antiferromagnetic layer stacked along a second direction orthogonal to the first direction. An element placement region is formed between the two stacks when viewed in the second direction. The element placement region includes a middle region and two end regions. The MR element is placed to lie within the middle region.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: April 7, 2020
    Assignee: TDK CORPORATION
    Inventor: Yosuke Komasaki
  • Patent number: 10605626
    Abstract: An angle sensor may comprise a sensing element including a first half bridge, where magnetic reference directions of resistors of the first half bridge are along a first reference axis. The sensing element may include a second half bridge, where magnetic reference directions of resistors of the second half bridge are along a second reference axis. The sensing element may include a third half bridge, where magnetic reference directions of resistors of the third half bridge are along a third reference axis. At least two of the first reference axis, the second reference axis, or the third reference axis may be non-orthogonal to each other.
    Type: Grant
    Filed: June 12, 2017
    Date of Patent: March 31, 2020
    Assignee: Infineon Technologies AG
    Inventor: Dirk Hammerschmidt
  • Patent number: 10591555
    Abstract: A magnetic sensor device includes: a magnet; a magnetic-resistance-effect-element mounted substrate on which a magnetic-resistance-effect-element mounted body is mounted on a surface thereof opposite to a surface thereof facing the magnet, the magnetic-resistance-effect-element mounted body extending in the longitudinal direction of the magnet; a case that accommodates or retains the magnet and the magnetic-resistance-effect-element mounted substrate; and a magnetic shield that covers the case except for the surface of the magnetic-resistance-effect-element mounted substrate on which is mounted the magnetic-resistance-effect-element mounted body. The magnetic shield covers the case at a position corresponding to the surface of the magnetic-resistance-effect-element mounted substrate facing the magnet, or from the position corresponding to the surface of the magnetic-resistance-effect-element mounted substrate facing the magnet to a side of the case opposite to the magnet.
    Type: Grant
    Filed: March 14, 2017
    Date of Patent: March 17, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hideki Matsui, Tomokazu Ogomi, Masaaki Okada, Kenji Shimohata, Sadaaki Yoshioka
  • Patent number: 10578684
    Abstract: A magnetic field sensor can include a substrate, a first magnetoresistance element disposed over the substrate and including a first maximum response axis and a first bias layer structure configured to generate a first bias magnetic field with a first magnetic direction between ninety degrees and sixty degrees relative to the first maximum response axis. The magnetic field sensor can also include a second magnetoresistance element disposed over the substrate and including a second maximum response axis parallel to the first maximum response axis and a second bias layer structure configured to generate a second bias magnetic field with a second magnetic direction parallel to the first magnetic direction and opposed to the first magnetic direction. The first and second magnetoresistance elements can each have a pair of electrical contacts for coupling to circuits.
    Type: Grant
    Filed: February 13, 2018
    Date of Patent: March 3, 2020
    Assignee: Allegro MicroSystems, LLC
    Inventors: Bryan Cadugan, Rémy Lassalle-Balier, Alexander Latham, Paolo Campiglio, Noémie Belin
  • Patent number: 10571298
    Abstract: A rotation detecting device includes first to fourth magneto-resistive elements that are provided on a first substrate to constitute a bridge circuit, a detection circuit provided on a second substrate, first to fourth wirings each connecting between the detection circuit and respective one of ends of the first to fourth magneto-resistive elements, first to fourth nodes provided on the second substrate, and first and second amplifiers provided on the second substrate. The first node combines signals on the first and second wirings. The second node combines signals on the third and fourth wirings. The first and second amplifiers amplify signals at the first and second nodes, respectively.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: February 25, 2020
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Takuya Tomida, Takeshi Uemura, Hideaki Fujiura, Ryo Osabe
  • Patent number: 10564228
    Abstract: The magnetoresistive effect element unit includes an anisotropic magnetoresistive effect element and a conductive reset line that, as viewed in a direction orthogonal to both a magnetic sensing direction x? and an easy magnetization direction y? of the anisotropic magnetoresistive effect element, passes through a center of the anisotropic magnetoresistive effect element, extends in a direction inclined from the easy magnetization direction y? so as to form an angle of 45° or less with the easy magnetization direction y?, and is parallel to a plane including the magnetic sensing direction x? and the easy magnetization direction y?. As viewed in the direction orthogonal to both the magnetic sensing direction x? and the easy magnetization direction y?, the reset line has a width that covers an entirety of the anisotropic magnetoresistive effect element.
    Type: Grant
    Filed: January 15, 2018
    Date of Patent: February 18, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tomokazu Ogomi, Kenji Shimohata, Jin Inoue, Tetsuji Imamura, Yoshinori Yamaguchi, Takashi Daimon
  • Patent number: 10545176
    Abstract: A current measurement circuit suitable for measuring the flow of current along a path in an electrical circuit such as a part of an electric power assisted steering system comprises a current measurement resistor that is located in series in the electrical path through which a current to be measured may flow, a first measurement sub-circuit that measures the voltage dropped across at least a part of the resistor and produces a first output signal, and a second measurement sub-circuit that measures the voltage dropped across at least a part of the resistor and produces a second output signal, and in which the electrical connections of the two sub-circuits to the resistor are independent of each other.
    Type: Grant
    Filed: October 8, 2015
    Date of Patent: January 28, 2020
    Assignee: TRW Limited
    Inventors: Stephen Harvey, Andrew Williams, Philip Browne
  • Patent number: 10535456
    Abstract: A permanent magnet includes at least two antiferromagnetic layers and at least two first ferromagnetic layers. A magnetization direction of each first ferromagnetic layer is set, by an exchange coupling, with one of the antiferromagnetic layers of the stack, parallel to and in the same direction as the magnetization directions of the other first ferromagnetic layers. The permanent magnet also includes at least one second ferromagnetic layer. A magnetization direction of each second ferromagnetic layer is pinned only by RKKY (Ruderman-Kittel-Kasuya-Yosida) coupling with at least one of the first ferromagnetic layers or with at least one other of the second ferromagnetic layers.
    Type: Grant
    Filed: April 16, 2015
    Date of Patent: January 14, 2020
    Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
    Inventors: Bertrand Delaet, Mathilde Cartier, Marie-Claire Cyrille
  • Patent number: 10533878
    Abstract: An angle sensor includes a plurality of composite magnetic field information generation units and an angle computing unit. The plurality of composite magnetic field information generation units detect, at a plurality of detection positions, a composite magnetic field of a magnetic field to be detected and a noise magnetic field other than the magnetic field to be detected, and thereby generate a plurality of pieces of composite magnetic field information including information on the direction of the composite magnetic field. The angle computing unit generates a detected angle value by performing an operation using the plurality of pieces of composite magnetic field information so that an error of the detected angle value caused by the noise magnetic field is made smaller than in the case where the detected angle value is generated on the basis of any and only one of the plurality of pieces of composite magnetic field information.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: January 14, 2020
    Assignee: TDK CORPORATION
    Inventors: Kenkichi Anagawa, Shinichirou Mochizuki, Hiraku Hirabayashi, Kazuya Watanabe
  • Patent number: 10522592
    Abstract: A TMR element includes a base layer that is disposed on an upper surface of a via interconnect part, a magnetic tunnel junction that is disposed on a surface of the base layer, and an interlayer insulation layer that covers a side surface of each of the via interconnect part and the base layer. The base layer includes a stress relieving region. The magnetic tunnel junction includes a reference layer having a magnetization fixed direction, a magnetization free layer, and a tunnel barrier layer disposed between the reference layer and the magnetization free layer. The interlayer insulation layer includes an insulation material.
    Type: Grant
    Filed: October 16, 2017
    Date of Patent: December 31, 2019
    Assignee: TDK CORPORATION
    Inventors: Tomoyuki Sasaki, Yoshitomo Tanaka
  • Patent number: 10509058
    Abstract: A current sensor can indirectly measure a sensed current by directly measuring static perturbing AC magnetic fields with magnetoresistance elements, the perturbing magnetic fields generated by perturbing coils. The sensed current can be indirectly measured by modulating or changing sensitivities of the magnetoresistance elements in a way that is directly related to the sensed current.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: December 17, 2019
    Assignee: Allegro MicroSystems, LLC
    Inventors: Bryan Cadugan, Rémy Lassalle-Balier, Alexander Latham, Paolo Campiglio, Noémie Belin
  • Patent number: 10509080
    Abstract: (Subject) To provide a differential magnetic sensor capable of accurate magnetic detection of a local weak magnetic field even when there is a difference in detection sensitivity of a plurality of magnetic sensors used as a differential type magnetic sensor.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: December 17, 2019
    Assignee: AICHI STEEL CORPORATION
    Inventors: Takeshi Kawano, Hitoshi Aoyama, Michiharu Yamamoto, Hideo Arakawa
  • Patent number: 10502767
    Abstract: An electric current detection device includes magnetism detector elements for detecting a strength of a magnetic field generated by an electric current flowing through an electric current path, a detection circuit for detecting a magnitude of an electric current flowing through the electric current path based on an output of the magnetism detector elements, and plural wires that are connected to the magnetism detector elements and extend in a direction away from the electric current path. The magnetism detector elements are arranged such that a direction of a magneto-sensitive axis thereof lies on a first plane parallel to a current-carrying direction of the electric current path and parallel to an extending direction of the plurality of wires. The plural wires are arranged on a same plane of a second plane orthogonal to the first plane.
    Type: Grant
    Filed: October 10, 2014
    Date of Patent: December 10, 2019
    Assignee: HITACHI METALS, LTD.
    Inventors: Masaki Noguchi, Naoki Futakuchi, Ken Okuyama
  • Patent number: 10502589
    Abstract: An XMR angle sensor arrangement with a safety mechanism comprises an XMR angle sensor having a sensing area for sensing an in-plane magnetic field and for outputting a sensor signal based on the in-plane magnetic field component sensed in the sensing area; a permanent magnet, which is rotatably arranged with respect to the XMR angle sensor to generate a first in-plane magnetic field component in the sensing area of the XMR angle sensor; an excitation current rail path, which is arranged proximate to the sensing area of the XMR angle sensor; and an excitation current provider configured to provide the excitation current rail path with an excitation signal having a excitation signal strength, wherein the excitation signal strength of the excitation signal is chosen to generate a second in-plane magnetic field component in the sensing area of the XMR angle sensor which results, due to a super position of the first and second in-plane magnetic field components, in an expected change of the direction of the result
    Type: Grant
    Filed: November 28, 2016
    Date of Patent: December 10, 2019
    Assignee: Infineon Technologies AG
    Inventor: Wolfgang Granig
  • Patent number: 10488445
    Abstract: In an embodiment, a current difference sensor includes first and second conductors arranged relative to one another such that when a first current flows through the first conductor and a second current, equal to the first current, flows through the second conductor, a first magnetic field induced in the first conductor and a second magnetic field induced in the second conductor cancel each other at first and second positions; first and second magnetic field sensing elements are arranged at the first and second positions, respectively, and have a first sensitivity to the first and second currents; third and fourth magnetic field sensing elements are arranged at other positions, and have a second sensitivity to the first and second currents; and the first sensitivity is less than the second sensitivity such that the first and second magnetic field sensing elements and not the third and fourth magnetic sensing elements are selected.
    Type: Grant
    Filed: May 24, 2017
    Date of Patent: November 26, 2019
    Assignee: Infineon Technologies AG
    Inventors: Udo Ausserlechner, Berthold Astegher
  • Patent number: 10466315
    Abstract: A magnetic field detection device includes a Z-direction detection unit with magnetoresistive elements provided on inclined side surfaces of Z-direction detection recesses; an X-direction detection unit includes magnetoresistive elements provided on inclined side surfaces of X-direction detection recesses and a Y-detection unit includes magnetoresistive elements provided on inclined side surfaces of Y-direction detection recesses, each of the detection units having a bridge circuit comprising two element lines connected in parallel, each element line comprising two of the magnetoresistive elements connected in series.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: November 5, 2019
    Assignee: ALPS ALPINE CO., LTD.
    Inventor: Eiji Umetsu
  • Patent number: 10415997
    Abstract: A method of determining a position of a sensor device relative to an external magnetic field, comprises: providing currents to conductors to generate an internal magnetic field that will superimpose with the external magnetic field, measuring field components of the combined magnetic field, calculating a position based on the applied currents and/or on the measured residual magnetic field. A position sensor is provided for performing the method.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: September 17, 2019
    Assignee: MELEXIS TECHNOLOGIES SA
    Inventors: Samuel Huber Lindenberger, Javier Bilbao De Mendizabal
  • Patent number: 10393828
    Abstract: An interdigitated Y-axis magnetoresistive sensor, comprising a substrate, and located on the substrate is a first comb-shaped soft ferromagnetic flux guide, a second comb-shaped soft ferromagnetic flux guide, and a push-pull magnetoresistive bridge sensing unit. It also may include a calibration and/or an initialization coil. The first and the second comb-shaped soft ferromagnetic flux guides are formed into an interdigitated shape. The gaps between a second comb tooth and two adjacent the first comb teeth are the first gap and the second gap. Furthermore, a pair of gaps are formed between the second come tooth and the base of the first comb as well as between the first comb tooth and the second comb tooth base. A push magnetoresistive unit string and a pull magnetoresistive unit string are alternately placed in the first gap and the second gap, respectively. The resulting magnetoresistive sensing unit senses the magnetic field along the X-axis.
    Type: Grant
    Filed: June 1, 2016
    Date of Patent: August 27, 2019
    Assignee: MultiDimension Technology Co., Ltd.
    Inventors: James Geza Deak, Zhimin Zhou
  • Patent number: 10379176
    Abstract: A single-chip high-magnetic-field X-axis linear magnetoresistive sensor with a calibration and an initialization coil, comprising a high magnetic field single-chip referenced bridge X-axis magnetoresistive sensor, a calibration coil, and an initialization coil, wherein the calibration coils are planar coils, and the initialization coils are planar or three-dimensional coils. The planar calibration coils and the planar initialization coils can be placed above a substrate and below the magnetoresistive sensor units, between the magnetoresistive sensor units and the soft ferromagnetic flux guides, above the soft ferromagnetic flux guides, or at gaps between the soft ferromagnetic flux guides. The three-dimensional initialization coil is wound around the soft ferromagnetic flux guides and magnetoresistive sensor units.
    Type: Grant
    Filed: February 3, 2016
    Date of Patent: August 13, 2019
    Assignee: MultiDimension Technology Co., Ltd.
    Inventors: James Geza Deak, Zhimin Zhou
  • Patent number: 10379175
    Abstract: Magnetic sensors are disclosed, as well as methods for fabricating and using the same. In some embodiments, an EMR effect sensor includes a semiconductor layer. In some embodiments, the EMR effect sensor may include a conductive layer substantially coupled to the semiconductor layer. In some embodiments, the EMR effect sensor may include a voltage lead coupled to the conductive layer. In some embodiments, the voltage lead may be configured to provide a voltage for measurement by a voltage measurement circuit. In some embodiments, the EMR effect sensor may include a second voltage lead coupled to the semiconductor layer. In some embodiments, the second voltage lead may be configured to provide a voltage for measurement by a voltage measurement circuit. Embodiments of a Hall effect sensor having the same or similar structure are also disclosed.
    Type: Grant
    Filed: December 5, 2013
    Date of Patent: August 13, 2019
    Assignee: KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Jurgen Kosel, Jian Sun
  • Patent number: 10365667
    Abstract: An observed operational state can include an operational state of one or more system devices. A sensor can emit, in response to a detected observable condition reflective of a given operational state, a simulated signal reflective of a different operational state as a proxy for the detected condition. A controller receiving such a proxy signal can, at least partially responsively to the proxy signal, issue a command corresponding to the given operational state. An electro-mechanical actuator can be selectively activatable responsive to the command.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: July 30, 2019
    Assignee: CoolIT Systems, Inc.
    Inventors: Geoff Sean Lyon, Mike Holden
  • Patent number: 10367248
    Abstract: An antenna according to one exemplary aspect of the present invention includes an antenna element and a reflector conductor that is arranged to be spaced apart from the antenna element. The antenna element includes a first split-ring conductor having such a shape that a part of a ring is cut by a split part, a first connection conductor having one end that is electrically connected to the first split-ring conductor and another end that is electrically connected to the reflector conductor, and a feed line conductor having one end that is electrically connected to the first split-ring conductor. The feed line conductor spans an opening that is formed inside the first split-ring conductor and overlaps an area surrounded by an outer edge of the first connection conductor.
    Type: Grant
    Filed: March 17, 2015
    Date of Patent: July 30, 2019
    Assignee: NEC Corporation
    Inventors: Hiroshi Toyao, Keishi Kosaka
  • Patent number: 10352682
    Abstract: Provided is a displacement detection device which reduces the influence of disturbance noise on a magnetic field to be detected and makes a range detectable by a monopole magnet wider than a pitch of a magnetic detection elements. A displacement detection device includes a magnet which is displaced in a displacement direction Ds, is rod-shaped and has a form in which a longitudinal direction and the displacement direction Ds form a predetermined angle ?, and a sensor IC in which magnetic detection element groups, which detect a magnetic flux density of a magnetic field formed by the magnet in an x direction and a z direction orthogonal to the displacement direction Ds, are arranged in pairs with a predetermined interval dp, and which outputs a difference between outputs of the magnetic detection element groups.
    Type: Grant
    Filed: July 20, 2017
    Date of Patent: July 16, 2019
    Assignee: MELEXIS TECHNOLOGIES SA
    Inventor: Takumi Yoshiya
  • Patent number: 10312286
    Abstract: A magnetic sensor for detecting a component of an external magnetic field in a specific direction includes a resistor array including a plurality of resistive element sections each having a magnetoresistance element. Each of the plurality of resistive element sections has a different output characteristic curve with respect to the component of the external magnetic field in the specific direction.
    Type: Grant
    Filed: December 29, 2015
    Date of Patent: June 4, 2019
    Assignee: TDK Corporation
    Inventors: Toshihide Suto, Hiraku Hirabayashi
  • Patent number: 10302712
    Abstract: A magnetic field sensing apparatus including a plurality of first magnetoresistance units, a plurality of second magnetoresistance units, and a magnetic field sensing device is provided. Magnetic field sensing axes of the first and second magnetoresistance units are parallel to a first direction and a second direction respectively, and the first and second magnetoresistance units are disposed beside the magnetic field sensing device, which is configured to measure a magnetic field component in a third direction. The first and second magnetoresistance units are electrically connected to form at least one kind of Wheatstone full bridge in two different time periods to respectively measure magnetic field components in fourth and fifth directions and to cause this kind of Wheatstone full bridge to output two signals respectively corresponding to the magnetic field components in the fourth and fifth directions. The first direction to the fifth direction are different from each other.
    Type: Grant
    Filed: October 24, 2017
    Date of Patent: May 28, 2019
    Assignee: iSentek Inc.
    Inventors: Fu-Te Yuan, Meng-Huang Lai
  • Patent number: 10288697
    Abstract: An AMR-type integrated magnetoresistive sensor sensitive to perpendicular magnetic fields is formed on a body of semiconductor material covered by an insulating region. The insulating region houses a set/reset coil and a magnetoresistor arranged on the set/reset coil. The magnetoresistor is formed by a magnetoresistive strip of an elongated shape parallel to the preferential magnetization direction. A concentrator of ferromagnetic material is arranged on top of the insulating region as the last element of the sensor and is formed by a plurality of distinct ferromagnetic regions aligned parallel to the preferential magnetization direction.
    Type: Grant
    Filed: November 20, 2015
    Date of Patent: May 14, 2019
    Assignee: STMICROELECTRONICS S.R.L.
    Inventor: Dario Paci
  • Patent number: 10281531
    Abstract: A chopping technique, and associated structure, is implemented to cancel the magnetic 1/f noise contribution in a Tunneling Magnetoresistance (TMR) field sensor. The TMR field sensor includes a first bridge circuit including multiple TMR elements to sense a magnetic field and a second circuit to apply a bipolar current pulse adjacent to each TMR element. The current lines are serially or sequentially connected to a current source to receive the bipolar current pulse. The field sensor has an output comprising a high output and a low output in response to the bipolar pulse. This asymmetric response allows a chopping technique for 1/f noise reduction in the field sensor.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: May 7, 2019
    Assignee: EVERSPIN TECHNOLOGIES, INC.
    Inventors: Bradley Neal Engel, Phillip G. Mather
  • Patent number: 10267832
    Abstract: A power detection device for a facility monitoring system provides non-contact power detection in a power supply line for determining a powered up or energized state of equipment connected to the power supply line. The power detection device is adapted to be disposed in communication with a live power supply line without disconnecting or interrupting the power supply to the powered equipment. A hinged casing including a sensor circuit for detecting electrical current is frictionally engaged to the power supply line by closing the hinge and drawing opposed sides of the casing together. Sensor signals are aggregated and amplified such that an amplified signal above a threshold is indicative of a current flow sufficient to power the equipment and render a determination of an energized, or “equipment on” state. Conversely, the lack of a threshold signal indicates inactive equipment such that remedial measures may be commenced.
    Type: Grant
    Filed: March 28, 2017
    Date of Patent: April 23, 2019
    Assignee: AVTECH Software, Inc.
    Inventors: Richard Grundy, Robert Snow
  • Patent number: 10267653
    Abstract: A position sensor and method for determining an axial and/or an angular position of a setting stem of a timepiece. A magnet is provided on the setting stem, and at least one magnetic field sensor is configured to detect changes in magnetic field strength along at least a first axis and a second axis as the rotatable element rotates; the second axis is not parallel to the first axis. The changing magnetic field sensed by the magnetic sensor is converted into a characteristic signature path which may then be mapped onto a circular signature path in two dimensions to derive the angular position of the setting stem.
    Type: Grant
    Filed: September 22, 2015
    Date of Patent: April 23, 2019
    Assignee: The Swatch Group Research and Development Ltd
    Inventors: Yvan Ferri, David Hoover, Jean-Jacques Born
  • Patent number: 10244376
    Abstract: The present invention provides an information processing apparatus and a method of deciding a correction amount for correcting the radio field intensity of received radio waves in the information processing apparatus. The information processing apparatus receives a BLE (Bluetooth Low Energy) packet transmitted by an external apparatus, and displays a screen for deciding a correction amount for correcting the radio field intensity of the BLE packet. If a user inputs an instruction for deciding the correction amount via this screen, the correction amount is decided based on the radio field intensity of the received BLE packet and a reference value.
    Type: Grant
    Filed: November 16, 2017
    Date of Patent: March 26, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hiroaki Goto, Masaki Kawanishi
  • Patent number: 10228426
    Abstract: A single chip Z-axis linear magnetoresistive sensor with a calibration/initialization coil comprises a single chip Z-axis linear magnetoresistive sensor, and a calibration coil and/or an initialization coil. The calibration coil and the initialization coil are planar coils or three-dimensional coils. The planar coils are located above a substrate and below a magnetoresistive sensing unit, between a magnetoresistive sensing unit and a soft ferromagnetic flux concentrator, above a soft ferromagnetic flux concentrator, or in a gap of the soft ferromagnetic flux concentrator. The three-dimensional coil is wound around the soft ferromagnetic flux concentrator and the magnetoresistive sensing unit.
    Type: Grant
    Filed: January 5, 2016
    Date of Patent: March 12, 2019
    Assignee: MultiDimension Technology Co., Ltd.
    Inventors: James Geza Deak, Zhimin Zhou
  • Patent number: 10210970
    Abstract: Control of electrical conductivity is provided via electrically conductive magnetic domain walls between magnetic domains. The magnetic domains are identical except for their magnetic configuration. Altering a configuration of the magnetic domains (e.g., by thermal treatment, application of a magnetic field, etc.) can alter the electrical resistance of a device. Such devices can be used as non-volatile information storage devices or as sensors.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: February 19, 2019
    Assignees: The Board of Trustees of the Leland Stanford Junior University, RIKEN
    Inventors: Yue Ma, Yongtao Cui, Kentaro Ueda, Jun Fujioka, Yoshinori Tokura, Zhixun Shen, Robert B. Laughlin
  • Patent number: 10188312
    Abstract: The present invention provides a detecting head device for capacitively measuring an acupuncture point frequency of a human body, comprising: an internal oscillator, which generates a predetermined oscillation frequency; an electronic counter, which is connected to the internal oscillator and calculates an internal oscillation frequency; and an external interrupt security routine (ISR), which is connected to the counting module and calculates, in combination with the internal oscillation frequency, a frequency F2 of the contacted acupuncture point of the human body.
    Type: Grant
    Filed: January 12, 2016
    Date of Patent: January 29, 2019
    Inventor: Chin Hung Lu
  • Patent number: 10191125
    Abstract: A magnetic sensor of a sensor unit includes magnetic sensing elements, an encapsulating portion, a primary terminal group and a secondary terminal group. Another magnetic sensor includes magnetic sensing elements, an encapsulating portion, a primary terminal group and a secondary terminal group. The magnetic sensors are mounted on a common surface of a circuit board. The adjacent two magnetic sensors, which are oriented in a common direction, are arranged such that the secondary terminal group of one of the adjacent two magnetic sensors is opposed to the primary terminal group of the other one of the adjacent two magnetic sensors. A primary output terminal and a secondary output terminal are placed asymmetrically to each other with respect to a center line of the encapsulating portion.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: January 29, 2019
    Assignee: DENSO CORPORATION
    Inventors: Takaharu Kozawa, Hideki Kabune, Yoshiki Takahashi
  • Patent number: 10184993
    Abstract: A magnetometric sensor comprises a magnetoresistance effect element having a sensitivity axis in a specific direction; including a fixed magnetic layer, a nonmagnetic material layer, and a free magnetic layer stacked in this order on a substrate; and including a first antiferromagnetic layer on the free magnetic layer on the opposite side to the side facing the nonmagnetic material layer to cause an exchange coupling bias between the first antiferromagnetic layer and the free magnetic layer and align the magnetization direction of the free magnetic layer in a prescribed direction in a state of permitting variation in magnetization. The free magnetic layer includes a first free magnetic sub-layer, a misfit-reducing sub-layer for decreasing the lattice mismatch of the free magnetic layer with the first antiferromagnetic layer, and a second free magnetic sub-layer ferromagnetically coupled to the first free magnetic sub-layer in this order from the first antiferromagnetic layer side.
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: January 22, 2019
    Assignee: ALPS ELECTRIC CO., LTD.
    Inventors: Yosuke Ide, Masamichi Saito
  • Patent number: 10161969
    Abstract: Two magnetic field sensors, ratiometric with respect to their common supply and featuring matched thermal coefficients, are inserted in the two airgaps of a magnetic circuit arranged so that said airgaps appear in series with respect to the magnetic flux generated by the current to be measured, while appearing in parallel with respect to the reference flux generated by a stable permanent magnet. The output signal of one of the sensors is thus proportional to the sum of said fluxes, the other to their difference. Adding and subtracting said signals produces two outputs, one proportional solely to the current to be measured, and the other solely to the reference flux. A feedback loop acts on the common supply of the two sensors in order to hold constant the output proportional to the reference flux, thus producing the effect that drifts with temperature of the magnetic sensitivities are intrinsically compensated for.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: December 25, 2018
    Assignee: C-Sigma s.r.l.
    Inventor: Luca Ghislanzoni
  • Patent number: 10151807
    Abstract: A magnetic field sensing apparatus and a detection method thereof are provided. The magnetic field sensing apparatus includes first and second AMR resistors, a current generator, and an arithmetic device. A magnetized direction of the first AMR resistor is set as a first direction. A magnetized direction of the second AMR resistor is set as a second direction opposite to or the same as the first direction. The current generator provides a current in a direction parallel to the first direction to flow through the first and second AMR resistors. The arithmetic device obtains a first detection voltage according to a voltage difference between two terminals of the first AMR resistor, obtains a second detection voltage according to a voltage difference between two terminals of the second AMR resistor, and performs his an arithmetic operation on the first and second detection voltages to obtain a first magnetic field detection result.
    Type: Grant
    Filed: November 25, 2016
    Date of Patent: December 11, 2018
    Assignee: iSentek Inc.
    Inventors: Fu-Te Yuan, Pei-Chun Kao, Meng-Huang Lai
  • Patent number: 10145908
    Abstract: Methods and apparatus for detecting a magnetic field include a semiconductor substrate, a coil configured to provide a changing magnetic field in response to a changing current in the coil; and a magnetic field sensing element supported by the substrate. The coil receives the changing current and, in response, generates a changing magnetic field. The magnetic field sensing element detects the presence of a magnetic target by detecting changes to the magnetic field caused by the target and comparing them to an expected value.
    Type: Grant
    Filed: July 19, 2013
    Date of Patent: December 4, 2018
    Assignee: Allegro MicroSystems, LLC
    Inventors: Paul David, William P. Taylor
  • Patent number: 10132843
    Abstract: A detector for detecting an occurrence of a current strength of interest of a current of a signal to be sensed includes a magnetoresistive structure and a detection unit. The magnetoresistive structure varies a resistance depending on a magnetic field caused by the current of the signal to be sensed. Further, the detection unit generates and provides a current detection signal indicating an occurrence of the current strength of interest based on a detected magnitude of the varying resistance of the magnetoresistive structure.
    Type: Grant
    Filed: July 11, 2013
    Date of Patent: November 20, 2018
    Assignee: Infineon Technologies Austria AG
    Inventors: Siegfried Krainer, Wolfgang Marbler, Wolfgang Granig
  • Patent number: 10082877
    Abstract: A vehicle sensor may indicate heading angle. A plurality of seating zones may each include an orientation sensor indicating seating angle. A component within one of the seating zones may provide interface information descriptive of commands and associated air gestures oriented to the one seating zone, and perform one of the commands responsive to a personal device detecting the corresponding air gesture, accounting for the heading angle and seating angle. Gesture input from a personal device may be adjusted to create acceleration data in a reference frame of an in-vehicle component in a seating zone using orientation of the device, vehicle heading relative to magnetic North, and orientation angle for the seating zone including the device. When the acceleration data matches an air gesture in a library of air gestures, a command may be sent to the component corresponding to the matching air gesture.
    Type: Grant
    Filed: March 15, 2016
    Date of Patent: September 25, 2018
    Assignee: Ford Global Technologies, LLC
    Inventors: Stephen Ronald Tokish, Pietro Buttolo, James Stewart Rankin, II, Stuart C. Salter
  • Patent number: 10018656
    Abstract: A device, an arrangement, and a method for measuring a current intensity in a primary conductor through which current flows are disclosed. In an embodiment, an apparatus includes a magnetic field-generating element configured to generate a reference magnetic field; and a magnetic field angle-sensitive element configured to measure an orientation of a total magnetic field, the total magnetic field is produced by overlapping of the primary magnetic field and the reference magnetic field in space, wherein the primary magnetic field and the reference magnetic field are not parallel to one another at a location of the magnetic field angle-sensitive element, and wherein the current intensity of the current flowing through the primary conductor is determinable from the orientation of the total magnetic field in space.
    Type: Grant
    Filed: October 29, 2014
    Date of Patent: July 10, 2018
    Assignee: EPCOS AG
    Inventors: Bernhard Ostrick, Carsten Dehoff