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    ANGLE SENSING USING DIFFERENTIAL MAGNETIC MEASUREMENT AND A BACK BIAS MAGNET
    1.
    发明申请
    ANGLE SENSING USING DIFFERENTIAL MAGNETIC MEASUREMENT AND A BACK BIAS MAGNET 审中-公开
    使用差分磁测量和背偏磁的角度检测

    公开(公告)号：WO2017139082A1

    公开(公告)日：2017-08-17

    申请号：PCT/US2017/014505

    申请日：2017-01-23

    Applicant: ALLEGRO MICROSYSTEMS, LLC

    Inventor： TIMA, Simon ,  VUILLERMET, Yannick ,  FRIEDRICH, Andreas, P. ,  KERDRAON, Thomas

    IPC: G01D5/14

    CPC classification number: G01D5/2013 ,  G01B7/14 ,  G01D5/147 ,  G01R33/072

    Abstract: A magnetic field sensor includes a back bias magnet to generate a DC magnetic field. First and second magnetic field sensing elements of the magnetic field sensor are disposed proximate to at least one ferromagnetic surface of a ferromagnetic target object. The first and second magnetic field sensing elements generate first and second electronic signals, respectively, in response to first and second sensed magnetic fields corresponding to the DC magnetic field but influenced by the at least one ferromagnetic surface. The magnetic field sensor generates a difference signal that is a difference of amplitudes of the first and second electronic signals. The difference signal is indicative of a rotation measurement of an absolute relative rotation of the ferromagnetic target object and the magnetic field sensor about a rotation axis.

    Abstract translation: 磁场传感器包括用于产生DC磁场的反向偏置磁体。 磁场传感器的第一和第二磁场感测元件被布置成靠近铁磁目标物体的至少一个铁磁性表面。 第一和第二磁场感测元件响应于对应于DC磁场但受至少一个铁磁性表面影响的第一和第二感测磁场分别产生第一和第二电子信号。 磁场传感器生成差分信号，该差分信号是第一和第二电子信号的幅度的差异。 差信号表示铁磁目标物体和磁场传感器围绕旋转轴的绝对相对旋转的旋转测量。

    CURRENT SENSOR SYSTEM
    2.
    发明申请
    CURRENT SENSOR SYSTEM 审中-公开

    公开(公告)号：WO2023038725A1

    公开(公告)日：2023-03-16

    申请号：PCT/US2022/038329

    申请日：2022-07-26

    Applicant: ALLEGRO MICROSYSTEMS, LLC

    Inventor： VUILLERMET, Yannick ,  MESSIER, Loïc, André

    IPC: G01R15/20

    Abstract: A current sensor system, includes: a plurality of conductors that are integrated into a substrate, each of the plurality of conductors having a respective first through-hole formed therein and a plurality of current sensors, each of the plurality of current sensors being disposed on the substrate. Each of the plurality of current sensors is disposed above or below the respective first through-hole of a different one of the plurality of conductors, and the substrate includes a plurality of conductive traces, each coupled to at least one of the plurality of current sensors.

    METHODS AND APPARATUS FOR PHASE OFFSET SELECTION IN RING MAGNET SENSING
    4.
    发明申请
    METHODS AND APPARATUS FOR PHASE OFFSET SELECTION IN RING MAGNET SENSING 审中-公开
    圆环磁感应中相位偏移选择的方法和装置

    公开(公告)号：WO2017091314A1

    公开(公告)日：2017-06-01

    申请号：PCT/US2016/058563

    申请日：2016-10-25

    Applicant: ALLEGRO MICROSYSTEMS, LLC

    Inventor： METIVIER, Ryan, J. ,  VUILLERMET, Yannick

    IPC: G01D5/14

    CPC classification number: G01D5/145

    Abstract: Methods and apparatus for positioning a magnetic field sensor IC package having a first channel for a planar magnetic field sensing element and a second channel for vertical magnetic field sensing element in relation to an axis of a ring magnet to provide a desired phase relationship between the first and second channels. In embodiments, positioning the sensor includes an offset angle and a displacement with respect to a centerline of the ring magnet.

    Abstract translation: 用于定位磁场传感器IC封装的方法和设备，所述磁场传感器IC封装具有用于平面磁场感测元件的第一通道和用于垂直磁场感测元件的第二通道，所述第二通道相对于环形磁体的轴线 在第一和第二通道之间提供期望的相位关系。 在实施例中，定位传感器包括相对于环形磁体的中心线的偏移角和位移。

    ORIENTATION INDEPENDENT MAGNETIC FIELD SENSOR
    6.
    发明申请
    ORIENTATION INDEPENDENT MAGNETIC FIELD SENSOR 审中-公开

    公开(公告)号：WO2021167706A1

    公开(公告)日：2021-08-26

    申请号：PCT/US2021/012254

    申请日：2021-01-06

    Applicant: ALLEGRO MICROSYSTEMS, LLC

    Inventor： FOLETTO, Andrea ,  VUILLERMET, Yannick ,  KULLA, Florian

    IPC: G01P3/488 ,  G01P3/489 ,  G01D5/14

    Abstract: Methods and apparatus for an orientation insensitive speed sensor. At least four magnetic field sensing elements are located on a planar circle, in diagonally opposed pairs. Each opposite pair is differentially combined to generate a respective channel signal, without the influence of external stray fields. The channel signals are combined to generate an output signal which is independent from the orientation of the sensor with regard to an axis perpendicular to the sensor plane. Embodiments can include true power on state processing to determine whether a tooth or a valley of the target is opposing the sensor during start up.

    MAGNETIC FIELD SENSOR FOR SENSING A MOVEMENT OF A TARGET OBJECT
    9.
    发明申请
    MAGNETIC FIELD SENSOR FOR SENSING A MOVEMENT OF A TARGET OBJECT 审中-公开
    用于感测目标物体运动的磁场传感器

    公开(公告)号：WO2016108992A2

    公开(公告)日：2016-07-07

    申请号：PCT/US2015/055230

    申请日：2015-10-13

    Applicant: ALLEGRO MICROSYSTEMS, LLC

    Inventor： FOLETTO, Andrea ,  VUILLERMET, Yannick ,  FRIEDRICH, Andreas, P.

    CPC classification number: G01D5/14 ,  G01D5/147 ,  G01D5/16

    Abstract: A magnetic field sensor operates as a motion detector for sensing a movement of a ferromagnetic target object having features. The magnetic field sensor has a plurality of magnetoresistance elements to generate, in a first channel, a feature signal indicative of a proximity of a feature of a ferromagnetic target object and, in a second channel, an edge signal indicative of a proximity of an edge of a feature of a ferromagnetic target object.

    Abstract translation: 磁场传感器用作运动检测器，用于感测具有特征的铁磁目标物体的运动。 磁场传感器具有多个磁阻元件，以在第一通道中生成指示铁磁目标物体的特征的接近度的特征信号，并且在第二通道中生成指示边缘的接近度的边缘信号 的铁磁目标物体的特征。

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