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公开(公告)号:US11150110B2
公开(公告)日:2021-10-19
申请号:US16529125
申请日:2019-08-01
Applicant: Allegro MicroSystems, LLC
Inventor: Bryan Cadugan
Abstract: Methods and apparatus for sensing target position by generating a signal by energizing a shaped coil with an AC signal. A sensor receives a signal reflected by a target in response to the signal from the shaped coil, wherein the shaped coil has a first width, and wherein the sensor includes a first sensing element aligned with the shaped coil at the first width, wherein a ratio of the first width and a distance from the sensor to the target is about three-to-one. The received signal can be processed to determine position information of the target. In some embodiments, a shaped coil can have a trapezoidal shape and sensors aligned with the coil to select a sensor based upon target to sensor distance.
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公开(公告)号:US11061084B2
公开(公告)日:2021-07-13
申请号:US16295131
申请日:2019-03-07
Applicant: Allegro MicroSystems, LLC
Inventor: Bryan Cadugan , Paul A. David , Jason Boudreau , William P. Taylor
Abstract: A pressure sensor includes a conductive substrate having a cavity which forms a thin portion that can be deformed by a pressure differential. A magnetic field sensor has at least one coil responsive to a changing coil drive signal and positioned proximate to the thin portion of the substrate that induces eddy currents in the thin portion that generate a reflected magnetic field. Magnetic field sensing elements detect the reflected magnetic field and generate a magnetic field signal. The magnetic field sensor is positioned so that deformation of the thin portion of the substrate causes a distance between the thin portion of the substrate and the magnetic field sensor to change.
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公开(公告)号:US10746820B2
公开(公告)日:2020-08-18
申请号:US16157317
申请日:2018-10-11
Applicant: Allegro MicroSystems, LLC
Inventor: Rémy Lassalle-Balier , Bryan Cadugan
IPC: G01R33/025 , G01R33/09
Abstract: A magnetic field sensor can include a magnetic field sensor can include a substrate having a major surface in an x-y plane with an x axis and a y axis. The magnetic field sensor can also have an external field sensing circuit disposed upon the substrate and responsive to an external magnetic field generated outside of the magnetic field sensor. The external field sensing circuit can include one or more magnetoresistance elements, each having a respective reference layer with a magnetic direction parallel to the y axis and in the x-y plane. The one or more magnetoresistance elements can be operable to generate a magnetoresistance element signal responsive to the external magnetic field. The external field sensing circuit can also include a component determination module coupled to receive the magnetoresistance element signal and operable to generate a measured x-dominant value and a measured y-dominant value, wherein the measured x-dominant value is indicative of an x component and a y component of the external magnetic field projected onto the x-y plane, wherein the measured x-dominant value more indicative of the x component and less indicative of the y component, wherein the measured y-dominant value is indicative of the x component and the y component, wherein the measured y-dominant value is more indicative of the y component and less indicative of the x component.
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公开(公告)号:US20200259026A1
公开(公告)日:2020-08-13
申请号:US16272005
申请日:2019-02-11
Applicant: Allegro MicroSystems, LLC
Inventor: Bryan Cadugan , Harianto Wong , William P. Taylor
IPC: H01L31/0352 , H01L31/105 , H01L31/18
Abstract: An electronics module assembly for detecting photons is provided to include: a substrate layer; a buried layer deposited upon a first surface area of the substrate layer; an intrinsic layer deposited upon a first portion of a first surface area of the buried layer; a plug layer deposited upon a second portion of the first surface area of the buried layer; a p-plus layer deposited upon a first surface area of the intrinsic layer; an n-plus layer deposited upon a first surface area of the plug layer; a pre-metal dielectric (PMD) layer deposited upon the p-plus layer and n-plus layer; a first node coupled, through the PMD layer, to the p-plus layer; and a second node coupled, through the PMD layer, to the n-plus layer.
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公开(公告)号:US20200116800A1
公开(公告)日:2020-04-16
申请号:US16157317
申请日:2018-10-11
Applicant: Allegro MicroSystems, LLC
Inventor: Rémy Lassalle-Balier , Bryan Cadugan
IPC: G01R33/025 , G01R33/09
Abstract: A magnetic field sensor can include a magnetic field sensor can include a substrate having a major surface in an x-y plane with an x axis and a y axis. The magnetic field sensor can also have an external field sensing circuit disposed upon the substrate and responsive to an external magnetic field generated outside of the magnetic field sensor. The external field sensing circuit can include one or more magnetoresistance elements, each having a respective reference layer with a magnetic direction parallel to the y axis and in the x-y plane. The one or more magnetoresistance elements can be operable to generate a magnetoresistance element signal responsive to the external magnetic field. The external field sensing circuit can also include a component determination module coupled to receive the magnetoresistance element signal and operable to generate a measured x-dominant value and a measured y-dominant value, wherein the measured x-dominant value is indicative of an x component and a y component of the external magnetic field projected onto the x-y plane, wherein the measured x-dominant value more indicative of the x component and less indicative of the y component, wherein the measured y-dominant value is indicative of the x component and the y component, wherein the measured y-dominant value is more indicative of the y component and less indicative of the x component.
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公开(公告)号:US20200033424A1
公开(公告)日:2020-01-30
申请号:US16047342
申请日:2018-07-27
Applicant: Allegro MicroSystems, LLC , Commissariat à l'énergie atomique et aux énergies alternatives
Inventor: Paolo Campiglio , Bryan Cadugan , Amal Hamdache , Florian Pallier , Claude Fermon
Abstract: A magnetoresistance assembly can include a substrate and a first GMR element disposed over the substrate, the first GMR element having a bottom surface and top surface. The magnetoresistance assembly can further include a first TMR element disposed over the substrate, the first TMR element having a top surface and a bottom surface, wherein a line perpendicular to and intersecting the top or bottom surface of the first TMR element intersects the first GMR element. The first GMR element and the first TMR element are in electrical communication.
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57.
公开(公告)号:US20200018780A1
公开(公告)日:2020-01-16
申请号:US16578767
申请日:2019-09-23
Applicant: Allegro MicroSystems, LLC
Inventor: Bryan Cadugan , Rémy Lassalle-Balier , Alexander Latham , Paolo Campiglio , Noémie Belin
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.
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58.
公开(公告)号:US20190219616A1
公开(公告)日:2019-07-18
申请号:US15869620
申请日:2018-01-12
Applicant: Allegro MicroSystems, LLC
Inventor: Bryan Cadugan , Rémy Lassalle-Balier , Alexander Latham , Paolo Campiglio , Noémie Belin
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.
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公开(公告)号:US20180340986A1
公开(公告)日:2018-11-29
申请号:US15606332
申请日:2017-05-26
Applicant: Allegro MicroSystems, LLC , COMMISSARIAT À L'É;NERGIE ATOMIQUE ET AUX ÉNERGIES ALTERNATIVES
Inventor: Alexander Latham , Claude Fermon , Jason Boudreau , Myriam Pannetier-Lecoeur , Bryan Cadugan , Hemán D. Romero
IPC: G01R33/00
Abstract: A magnetic field sensor includes at least one coil responsive to an AC coil drive signal; at least one magnetic field sensing element responsive to a sensing element drive signal and configured to detect a directly coupled magnetic field generated by the at least one coil and to generate a magnetic field signal in response to the directly coupled magnetic field; a processor responsive to the magnetic field signal to compute a sensitivity value associated with detection of the directly coupled magnetic field and substantially independent of a reflected magnetic field reflected by a conductive target disposed proximate to the at least one magnetic field sensing element; and an output signal generator configured to generate an output signal of the magnetic field sensor indicative of the reflected magnetic field.
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公开(公告)号:US20180149677A1
公开(公告)日:2018-05-31
申请号:US15363285
申请日:2016-11-29
Applicant: Allegro MicroSystems, LLC
Inventor: Shaun D. Milano , Bryan Cadugan , Michael C. Doogue , Alexander Latham , William P. Taylor , Harianto Wong , Sundar Chetlur
CPC classification number: G01R15/148 , G01R15/202 , G01R15/205 , G01R15/207 , G01R19/0092 , H01L2224/16145 , H01L2224/48091 , H01L2224/48247 , H01L2224/48465 , H01L2224/73265 , H01L2924/00014 , H01L2924/00
Abstract: Systems and methods described herein are directed towards integrating a shield layer into a current sensor to shield a magnetic field sensing element and associated circuitry in the current sensor from electrical, voltage, or electrical transient noise. In an embodiment, a shield layer may be disposed along at least one surface of a die supporting a magnetic field sensing element. The shield layer may be disposed in various arrangements to shunt noise caused by a parasitic coupling between the magnetic field sensing element and the current carrying conductor away from the magnetic field sensing element.
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