中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

116 records (took 0.024 seconds)

    MAGNETIC FIELD CURRENT SENSOR TO REDUCE STRAY MAGNETIC FIELDS
    91.
    发明公开
    MAGNETIC FIELD CURRENT SENSOR TO REDUCE STRAY MAGNETIC FIELDS 审中-公开

    公开(公告)号：US20230400537A1

    公开(公告)日：2023-12-14

    申请号：US17806336

    申请日：2022-06-10

    Applicant: Allegro MicroSystems, LLC

    Inventor： Rémy Lassalle-Balier ,  Alexander Latham

    IPC: G01R33/09 ,  G01R15/20

    CPC classification number: G01R33/098 ,  G01R15/205 ,  G01R33/091

    Abstract: In one aspect, a magnetic field current sensor includes an annihilation detector. The annihilation detector includes an annihilation bridge that includes magnetoresistance elements. The annihilation detector also includes a current bridge that includes at least two of the magnetoresistance elements, a first comparator configured to compare an output signal from the annihilation bridge and a second comparator configured to compare an output signal from the current bridge. An output of the annihilation detector indicates whether an annihilation exists in one or more of the magnetoresistance elements using at least one of the outputs signals of the first and second comparators.

    High isolation current sensor
    93.
    发明授权
    High isolation current sensor 有权

    公开(公告)号：US11800813B2

    公开(公告)日：2023-10-24

    申请号：US16887045

    申请日：2020-05-29

    Applicant: Allegro MicroSystems, LLC

    Inventor： Alexander Latham ,  Natasha Healey

    IPC: G01R15/20 ,  G01R19/00 ,  G01R33/06 ,  H10N50/80 ,  H01L25/16

    CPC classification number: H10N50/80 ,  G01R15/207 ,  G01R19/0092 ,  G01R33/06 ,  H01L25/16

    Abstract: Methods and apparatus for providing a high isolation current sensor. In embodiments, a current sensor includes a leadframe having a current conductor first portion and a second portion, a magnetic field sensing element positioned in relation to the current conductor for detecting a magnetic generated by current flow through the current conductor, and a die supported by at least a portion of the first and/or second portions of the leadframe, wherein the first portion of the lead frame includes an isolation region aligned with a first edge of the die. In embodiments, a current sensor includes SOI processing and features to enhance active layer isolation.

    MAGNETIC FIELD DIFFERENTIAL TORQUE SENSOR
    94.
    发明公开
    MAGNETIC FIELD DIFFERENTIAL TORQUE SENSOR 审中-公开

    公开(公告)号：US20230258515A1

    公开(公告)日：2023-08-17

    申请号：US17651265

    申请日：2022-02-16

    Applicant: Allegro MicroSystems, LLC

    Inventor： Till-Jonas Ostermann ,  Alexander Latham

    IPC: G01L3/10 ,  G01L5/22

    CPC classification number: G01L3/101 ,  G01L5/221

    Abstract: Systems, methods, and apparatus for differential magnetic field torque sensors that include first and second magnetic targets for coupling to one or more rotatable shafts. The magnetic targets can include multipole ring magnets having a plurality of alternating magnetic domains. First and second differential magnetic field angular position sensors positioned proximate to the magnetic targets produce angular position of the targets and a processing unit is operative to receive an angular position from each of the first and second differential magnetic field angular position sensors and determine a difference between the angular positions. The difference corresponds to an angle between the targets, and the processing unit is operative to calculate, based on the angle, a torque applied to the one or more rotatable shafts.

    Linear inductive torque sensor
    95.
    发明授权
    Linear inductive torque sensor 有权

    公开(公告)号：US11662260B2

    公开(公告)日：2023-05-30

    申请号：US17466202

    申请日：2021-09-03

    Applicant: Allegro MicroSystems, LLC

    Inventor： Alexander Latham ,  Hernán D. Romero

    IPC: G01L3/10 ,  G01L5/22

    CPC classification number: G01L3/105 ,  G01L5/221

    Abstract: Methods and apparatus for linear inductive torque sensing that may include transmitting an AC magnetic field with a transmit coil toward a conductive target and receiving a field reflected by the conductive target with a receive coil, wherein the conductive target comprises first and second targets positioned with respect to each other and each shaped to linearly increase or decrease an amount of conductive area of the conductive target due to relative movement of the first and second targets which changes an amount of the field reflected by the conductive target. A signal from the receive coil can be processed to determine a relative position of the first and second targets corresponding to an amount of torque on an elongate member connected to the first and second targets. In other embodiments, a change in inductance of the transmit coil is measured to determine relative target position.

    INTEGRATED SHUNT AND MAGNETIC FIELD CURRENT SENSOR
    96.
    发明申请
    INTEGRATED SHUNT AND MAGNETIC FIELD CURRENT SENSOR 有权

    公开(公告)号：US20220283200A1

    公开(公告)日：2022-09-08

    申请号：US17189480

    申请日：2021-03-02

    Applicant: Allegro MicroSystems, LLC

    Inventor： Andreas P. Friedrich ,  Loïc André Messier ,  Alexander Latham

    IPC: G01R15/20 ,  G01K7/22 ,  G01R19/00

    Abstract: According to some embodiments, a device includes: a magnetic field current sensor magnetically coupled to a conductor and configured to generate a magnetic field signal having a magnitude responsive to a current flowing through the conductor; a shunt interface having first and second input terminals electrically coupled to ends of a shunt disposed along the conductor, the shunt interface configured to generate a shunt signal having a magnitude responsive to the current flowing through the conductor; and a diagnostic circuit configured to receive the magnetic field signal and the shunt signal and to generate a fault signal based on a comparison between the magnitude of the magnetic field signal and the magnitude of the shunt signal.

    HIGH ISOLATION CURRENT SENSOR
    98.
    发明申请
    HIGH ISOLATION CURRENT SENSOR 有权

    公开(公告)号：US20210376227A1

    公开(公告)日：2021-12-02

    申请号：US16887045

    申请日：2020-05-29

    Applicant: Allegro MicroSystems, LLC

    Inventor： Alexander Latham ,  Natasha Healey

    IPC: H01L43/02 ,  G01R15/20 ,  G01R33/06 ,  G01R19/00 ,  H01L25/16

    Abstract: Methods and apparatus for providing a high isolation current sensor. In embodiments, a current sensor includes a leadframe having a current conductor first portion and a second portion, a magnetic field sensing element positioned in relation to the current conductor for detecting a magnetic generated by current flow through the current conductor, and a die supported by at least a portion of the first and/or second portions of the leadframe, wherein the first portion of the lead frame includes an isolation region aligned with a first edge of the die. In embodiments, a current sensor includes SOI processing and features to enhance active layer isolation.

    Magnetic field sensor with modulated diagnostic signal
    99.
    发明授权
    Magnetic field sensor with modulated diagnostic signal 有权

    公开(公告)号：US11143732B2

    公开(公告)日：2021-10-12

    申请号：US15901135

    申请日：2018-02-21

    Applicant: Allegro MicroSystems, LLC

    Inventor： Hernán D. Romero ,  Alexander Latham

    IPC: G01R35/00 ,  G01R33/00 ,  G01R33/07 ,  G01R33/09 ,  G01D5/14 ,  G01D18/00 ,  G01D5/16

    Abstract: A magnetic field sensor comprises a first coil configured to generate a magnetic field having a first frequency and induce a reflected magnetic field from a target. A second coil configured to generate a diagnostic magnetic field having a second frequency is included. The diagnostic magnetic field is configured not to induce a reflected magnetic field from the target that is measurable by the magnetic field sensor. At least two magnetic field sensing elements detect the reflected magnetic field and the diagnostic magnetic field and generate a signal representing the reflected magnetic field and the diagnostic magnetic field. A processing circuit is coupled to the at least two magnetic field sensing elements and configured to receive the signal, extract a diagnostic magnetic field portion of the signal representing the diagnostic magnetic field, and generate an error signal if a fault is detected.

Patent Agency Ranking