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    Sensor having a shaped coil
    51.
    发明授权
    Sensor having a shaped coil 有权

    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

    IPC: G01D5/16 ,  G01R33/09

    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.

    Coil actuated pressure sensor and deflectable substrate
    52.
    发明授权
    Coil actuated pressure sensor and deflectable substrate 有权

    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

    IPC: G01L9/00 ,  G01R33/00 ,  G01R33/07 ,  G01L13/02

    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.

    Magnetic field sensor that corrects for the effect of a stray magnetic field using one or more magnetoresistance elements, each having a reference layer with the same magnetic direction
    53.
    发明授权
    Magnetic field sensor that corrects for the effect of a stray magnetic field using one or more magnetoresistance elements, each having a reference layer with the same magnetic direction 有权

    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.

    PHOTODETECTOR WITH A BURIED LAYER
    54.
    发明申请
    PHOTODETECTOR WITH A BURIED LAYER 审中-公开

    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.

    MAGNETIC FIELD SENSOR THAT CORRECTS FOR THE EFFECT OF A STRAY MAGNETIC FIELD USING ONE OR MORE MAGNETORESISTANCE ELEMENTS, EACH HAVING A REFERENCE LAYER WITH THE SAME MAGNETIC DIRECTION
    55.
    发明申请
    MAGNETIC FIELD SENSOR THAT CORRECTS FOR THE EFFECT OF A STRAY MAGNETIC FIELD USING ONE OR MORE MAGNETORESISTANCE ELEMENTS, EACH HAVING A REFERENCE LAYER WITH THE SAME MAGNETIC DIRECTION 审中-公开

    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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