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    METHODS AND APPARATUS FOR PHASE OFFSET SELECTION IN RING MAGNET SENSING
    11.
    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。

    METHODS AND APPARATUS FOR ERROR DETECTION IN A MAGNETIC FIELD SENSOR
    12.
    发明申请
    METHODS AND APPARATUS FOR ERROR DETECTION IN A MAGNETIC FIELD SENSOR 审中-公开
    用于磁场传感器中的误差检测的方法和装置

    公开(公告)号：WO2016069216A3

    公开(公告)日：2017-05-26

    申请号：PCT/US2015054172

    申请日：2015-10-06

    Applicant: ALLEGRO MICROSYSTEMS LLC

    Inventor： SNYDER STEVEN E ,  MCCONNELL CRAIG ,  WELLS PETER G

    IPC: G01P21/02 ,  G01D5/14 ,  G01D18/00 ,  G01P3/487 ,  G01P3/488 ,  G01P13/04 ,  G01R33/09

    CPC classification number: G01D18/00 ,  G01D5/14 ,  G01P3/487 ,  G01P3/488 ,  G01P13/045 ,  G01P21/02 ,  G01R33/093 ,  G01R33/096 ,  G01R33/098

    Abstract: A magnetic field sensor for detecting motion of an object includes error detection circuitry and processing. Magnetic field sensing elements are configured to generate at least two magnetic field signals in response to a magnetic field associated with the object which signals are used by detectors to generate right and left channel signals with edges indicative of motion of the object. A direction calculation processor responsive to right and left channel signals generates a direction signal having a state indicative of a direction of motion of the object and an output signal generator generates an output signal having a pulse indicative of the direction of motion of the object in response to the direction signal. In particular, output pulses indicating motion are produced with different length according to the direction of rotation. An error detection processor responsive to the output signal and to the direction signal is configured to detect an error in at least one of the direction signal and the output signal. In particular, it can be checked whether the edges of the output signal occur at the same time as the edges of one input signal and whether the duration of the pulses corresponds to one of the predetermined durations.

    Abstract translation: 用于检测物体的运动的磁场传感器包括错误检测电路和处理。 磁场感测元件被配置成响应于与物体相关联的磁场而生成至少两个磁场信号，所述信号被检测器用于生成具有指示物体的运动的边缘的右和左信道信号。 响应于右声道信号和左声道信号的方向计算处理器生成具有指示对象的运动方向的状态的方向信号，并且输出信号生成器生成具有表示对象的运动方向的脉冲的输出信号 到方向信号。 特别是，根据旋转方向产生具有不同长度的指示运动的输出脉冲。 响应于输出信号和方向信号的错误检测处理器被配置为检测方向信号和输出信号中的至少一个中的错误。 具体地说，可以检查输出信号的边缘是否与一个输入信号的边缘同时发生，以及脉冲的持续时间是否对应于预定持续时间中的一个。

    MAGNETIC FIELD SENSORS AND METHODS USING MIXING IN A MAGNETORESISTANCE ELEMENT
    13.
    发明申请
    MAGNETIC FIELD SENSORS AND METHODS USING MIXING IN A MAGNETORESISTANCE ELEMENT 审中-公开
    磁场传感器和使用磁阻元件中的混合的方法

    公开(公告)号：WO2017058586A1

    公开(公告)日：2017-04-06

    申请号：PCT/US2016/052745

    申请日：2016-09-21

    Applicant: ALLEGRO MICROSYSTEMS, LLC ,  COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES

    Inventor： MONREAL, Gerardo, A. ,  FRIEDRICH, Andreas, P. ,  FERMON, Claude ,  PANNETIER-LECOEUR, Myriam

    IPC: G01R33/06 ,  G01R33/09

    CPC classification number: G01R33/0023 ,  G01R33/09 ,  G01R33/093

    Abstract: A magnetic field sensor and an associated method use one or more magnetoresistance elements ( 1302, 1304, 1306, 1308) driven with an AC mixing current (1312, 1316) and experiencing an AC mixing magnetic field which have AC components of the same frequency (fmod), such as to generate a DC voltage signal (1334a, 1334b) or a DC voltage signal component related to a slope of a transfer curve of the one or more magnetoresistance elements, wherein the mixing takes place in the magnetoresistance element(s) and results in changes of the value of the DC component in response to changes of the sensed external magnetic field.

    Abstract translation: 磁场传感器和相关联的方法使用由AC混合电流（1312,1316）驱动并经历具有相同频率的AC分量的AC混合磁场的一个或多个磁阻元件（1302,1304,1306,1308） fmod），以产生与一个或多个磁阻元件的传输曲线的斜率相关的DC电压信号（1334a，1334b）或DC电压信号分量，其中混合发生在磁阻元件中， 并且响应于所感测的外部磁场的变化而导致DC分量的值的变化。

    MAGNETIC FIELD SENSOR FOR ANGLE DETECTION WITH A PHASE-LOCKED LOOP
    14.
    发明申请
    MAGNETIC FIELD SENSOR FOR ANGLE DETECTION WITH A PHASE-LOCKED LOOP 审中-公开
    用于具有相位锁定环的角度检测的磁场传感器

    公开(公告)号：WO2016200637A1

    公开(公告)日：2016-12-15

    申请号：PCT/US2016/034931

    申请日：2016-05-31

    Applicant: ALLEGRO MICROSYSTEMS, LLC

    Inventor： DAUBERT, Steven

    IPC: G01R33/00 ,  G01R33/07

    CPC classification number: G01R33/077 ,  G01R33/0041 ,  G01R33/075

    Abstract: A magnetic field sensor includes a phase-locked loop to receive a measured magnetic field signal formed from sensing element output signals of a plurality of magnetic field sensing elements in response to a magnetic field. The phase-locked loop is configured to generate an angle signal having a value indicative of the angle of the magnetic field. Associated methods are also described.

    Abstract translation: 磁场传感器包括锁相环，用于响应于磁场接收由多个磁场感测元件的感测元件输出信号形成的测量的磁场信号。 锁相环被配置为产生具有指示磁场角度的值的角度信号。 还描述了相关方法。

    METHODS AND APPARATUS FOR ERROR DETECTION IN A MAGNETIC FIELD SENSOR
    17.
    发明申请
    METHODS AND APPARATUS FOR ERROR DETECTION IN A MAGNETIC FIELD SENSOR 审中-公开
    用于磁场传感器中错误检测的方法和装置

    公开(公告)号：WO2016069216A2

    公开(公告)日：2016-05-06

    申请号：PCT/US2015/054172

    申请日：2015-10-06

    Applicant: ALLEGRO MICROSYSTEMS, LLC

    Inventor： SNYDER, Steven, E. ,  MCCONNELL, Craig ,  WELLS, Peter, G.

    IPC: G01P21/02 ,  G01P3/487 ,  G01P3/488 ,  G01P13/04

    CPC classification number: G01D18/00 ,  G01D5/14 ,  G01P3/487 ,  G01P3/488 ,  G01P13/045 ,  G01P21/02 ,  G01R33/093 ,  G01R33/096 ,  G01R33/098

    Abstract: A magnetic field sensor for detecting motion of an object includes error detection circuiting and processing. Magnetic field sensing elements are configured to generate at least two magnetic field signals in response to a magnetic field associated with the object which signals are used by detectors to generate right and left channel signals with edges indicative of motion of the object. A direction calculation processor responsive to right and left channel signals generates a direction signal having a state indicative of a direction of motion of the object and an output signal generator generates an output signal having a pulse indicative of the direction of motion of the object in response to the direction signal. An error detection processor responsive to the output signal and to the direction signal is configured to detect an error in at least one of the direction signal and the output signal.

    Abstract translation: 用于检测物体运动的磁场传感器包括误差检测电路和处理。 磁场感测元件被配置为响应于与物体相关联的磁场而产生至少两个磁场信号，该信号被检测器用于产生具有指示物体运动的边缘的左和右声道信号。 响应于右和左声道信号的方向计算处理器产生具有指示对象的运动方向的状态的方向信号，并且输出信号发生器产生具有指示对象的运动方向的脉冲的响应的输出信号 到方向信号。 响应于输出信号和方向信号的错误检测处理器被配置为检测方向信号和输出信号中的至少一个中的错误。

    SYSTEMS AND METHODS FOR SENSING CURRENT THROUGH A LOW-SIDE FIELD EFFECT TRANSISTOR
    19.
    发明申请
    SYSTEMS AND METHODS FOR SENSING CURRENT THROUGH A LOW-SIDE FIELD EFFECT TRANSISTOR 审中-公开
    通过低端场效应晶体管感测电流的系统和方法

    公开(公告)号：WO2015167822A1

    公开(公告)日：2015-11-05

    申请号：PCT/US2015/026332

    申请日：2015-04-17

    Applicant: ALLEGRO MICROSYSTEMS, LLC

    Inventor： MCINTOSH, James ,  CHRISTIE, Robert, D. ,  BRYCE, Douglas ,  WILSON, Walter Morrison, Stewart

    IPC: G01R19/165 ,  H02P8/12

    CPC classification number: H03K17/6871 ,  A61B17/1626 ,  B26B19/00 ,  B26B19/06 ,  G01R19/16538 ,  G01R19/16571 ,  H02P8/12 ,  H02P31/00

    Abstract: Systems and techniques detecting a reverse current are disclosed. An apparatus comprises a switching circuit coupled to a load and a reference node. The switching circuit may be capable of conducting a reverse current from the reference node to the load when a voltage at the load is lower than a voltage at the reference node. A voltage source has a first terminal coupled to the load, a second terminal configured to follow a voltage at the load, and produces a voltage proportional to a voltage drop across the switching circuit. A comparator circuit is coupled to compare a voltage at the second terminal of the voltage source to the voltage at the reference node and configured to indicate when the reverse current has a magnitude greater than a predetermined threshold.

    Abstract translation: 公开了检测反向电流的系统和技术。 一种装置包括耦合到负载和参考节点的开关电路。 当负载电压低于参考节点处的电压时，开关电路可能能够从参考节点向负载传导反向电流。 电压源具有耦合到负载的第一端子，被配置为跟随负载处的电压的第二端子，并产生与开关电路两端的电压降成比例的电压。 比较器电路被耦合以将电压源的第二端子处的电压与参考节点处的电压进行比较，并且被配置为指示何时反向电流具有大于预定阈值的幅度。

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