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    Magnetic field sensor with immunity to external magnetic influences
    32.
    发明授权
    Magnetic field sensor with immunity to external magnetic influences 有权

    公开(公告)号：US09664494B2

    公开(公告)日：2017-05-30

    申请号：US13891519

    申请日：2013-05-10

    Applicant: Allegro Microsystems, LLC

    Inventor： Devon Fernandez ,  Paul David ,  William P. Taylor

    IPC: G01B7/30 ,  G01B7/00 ,  G01R33/00

    CPC classification number: G01B7/003 ,  G01R33/0023

    Abstract: A magnetic field sensor with enhanced immunity to external magnetic interference is presented. Included is a magnetic field signal generator and a demodulator. The magnetic field signal generator produces a magnetic field signal having a modulated signal portion in a first frequency band based on a sensed modulated AC bias magnetic field. The modulated AC bias magnetic field is produced by movement of ferromagnetic target relative to a bias coil when an AC signal is applied to the bias coil. When the magnetic field signal also includes an unwanted signal portion in a second frequency band based on external magnetic interference, demodulation performed by the demodulator results in the modulated signal portion being shifted from the first frequency band to a third frequency band and the unwanted signal portion being shifted to the first frequency band. The bias coil may be provided as part of the magnetic field sensor.

    SYSTEMS AND METHODS FOR PROCESSING TEMPERATURE DATA OR OTHER SIGNALS
    34.
    发明申请
    SYSTEMS AND METHODS FOR PROCESSING TEMPERATURE DATA OR OTHER SIGNALS 有权
    处理温度数据或其他信号的系统和方法

    公开(公告)号：US20160238671A1

    公开(公告)日：2016-08-18

    申请号：US15138559

    申请日：2016-04-26

    Applicant: Allegro Microsystems, LLC

    Inventor： Mathew Drouin ,  Devon Fernandez ,  William P. Taylor

    IPC: G01R33/00 ,  G01R33/09 ,  G01R33/07

    CPC classification number: G01R33/0082 ,  G01D3/0365 ,  G01K7/00 ,  G01K7/01 ,  G01R33/0017 ,  G01R33/0029 ,  G01R33/0041 ,  G01R33/07 ,  G01R33/09 ,  G01R35/005

    Abstract: In an embodiment, a circuit is configured to produce a magnetic field signal having a frequency spectrum. The circuit may also produce a temperature signal. A modulation circuit may modulate the temperature signal with a frequency outside the frequency spectrum of the magnetic field signal. The modulated signal and the magnetic field signal may be combined to produce a combined signal. A separation circuit may be configured to separate component signals from the combined signal. The separation circuit may include a first filter, which, when applied to the combined signal, produces a filtered signal; a modulation circuit configured to shift the data representing the temperature signal to a baseband frequency; and a second filter configured to separate the data representing the temperature signal from the combined signal.

    Abstract translation: 在一个实施例中，电路被配置为产生具有频谱的磁场信号。 电路也可能产生温度信号。 调制电路可以用在磁场信号的频谱之外的频率来调制温度信号。 调制信号和磁场信号可以被组合以产生组合信号。 分离电路可以被配置为从组合信号中分离分量信号。 分离电路可以包括第一滤波器，当应用于组合信号时，产生滤波信号; 调制电路，被配置为将表示温度信号的数据移位到基带频率; 以及第二滤波器，被配置为将表示温度信号的数据与组合信号分离。

    Output Driver Having Reduced Electromagnetic Susceptibility and Associated Methods
    39.
    发明申请
    Output Driver Having Reduced Electromagnetic Susceptibility and Associated Methods 审中-公开
    具有降低电磁敏感性和相关方法的输出驱动器

    公开(公告)号：US20160282893A1

    公开(公告)日：2016-09-29

    申请号：US15161529

    申请日：2016-05-23

    Applicant: Allegro Microsystems, LLC

    Inventor： Richard B. Cooper ,  Maxim Klebanov ,  Washington Lamar ,  Devon Fernandez

    IPC: G05F3/02 ,  H01L43/02

    CPC classification number: G05F3/02 ,  H01L27/0259 ,  H01L27/0266 ,  H01L43/02 ,  H03K19/00361

    Abstract: An electronic circuit includes semiconductor substrate having a first doping type and a reference terminal coupled to the semiconductor substrate. A tub area having a second doping type is formed in the semiconductor substrate. A well area having the first doping type is formed within the tub area. A driver circuit comprising a transistor is formed within the well area and has an output terminal. A control circuit is coupled to the driver circuit for controlling the driver circuit. A second transistor is within the well area and coupled in series between the driver circuit and the output terminal, the second transistor having a first terminal coupled to the driver circuit and a second terminal coupled to the output terminal. A biasing circuit is coupled to a gate terminal of the second transistor and configured to bias the transistor to a conducting state.

    Abstract translation: 电子电路包括具有耦合到半导体衬底的第一掺杂型和参考端的半导体衬底。 在半导体衬底中形成具有第二掺杂类型的桶区。 具有第一掺杂类型的阱区形成在桶区内。 包括晶体管的驱动电路形成在阱区内并具有输出端。 控制电路耦合到驱动电路以控制驱动器电路。 第二晶体管在阱区内并且串联耦合在驱动器电路和输出端之间，第二晶体管具有耦合到驱动电路的第一端子和耦合到输出端的第二端子。 偏置电路耦合到第二晶体管的栅极端子并且被配置为将晶体管偏置为导通状态。

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