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    Magnetic Field Sensor Integrated Circuit with Integral Ferromagnetic Material
    1.
    发明申请
    Magnetic Field Sensor Integrated Circuit with Integral Ferromagnetic Material 审中-公开
    具有积分铁磁材料的磁场传感器集成电路

    公开(公告)号：US20130249544A1

    公开(公告)日：2013-09-26

    申请号：US13424618

    申请日：2012-03-20

    申请人： Ravi Vig ,  William P. Taylor ,  Andreas P. Friedrich ,  Paul David ,  Marie-Adelaide Lo ,  Eric Burdette ,  Eric Shoemaker ,  Michael C. Doogue

    发明人： Ravi Vig ,  William P. Taylor ,  Andreas P. Friedrich ,  Paul David ,  Marie-Adelaide Lo ,  Eric Burdette ,  Eric Shoemaker ,  Michael C. Doogue

    IPC分类号： G01R33/02

    CPC分类号： G01R33/0047 ,  G01B7/30 ,  G01R33/0011

    摘要： A magnetic field sensor includes a lead frame, a semiconductor die supporting a magnetic field sensing element, a non-conductive mold material enclosing the die and a portion of the lead frame, a ferromagnetic mold material secured to the non-conductive mold material and a securing mechanism to securely engage the mold materials. The ferromagnetic mold material may comprise a soft ferromagnetic material to form a concentrator or a hard ferromagnetic material to form a bias magnet. The ferromagnetic mold material may be tapered and includes a non-contiguous central region, as may be an aperture or may contain the non-conductive mold material or an overmold material. Further embodiments include die up, lead on chip, and flip-chip arrangements, wafer level techniques to form the concentrator or bias magnet, integrated components, such as capacitors, on the lead frame, and a bias magnet with one or more channels to facilitate overmolding.

    摘要翻译： 磁场传感器包括引线框架，支撑磁场感测元件的半导体管芯，封装模具的非导电模具材料和引线框架的一部分，固定到非导电模具材料的铁磁模具材料和 固定机构可牢固地接合模具材料。 铁磁模具材料可以包括软铁磁材料以形成集中器或硬铁磁材料以形成偏置磁体。 铁磁模具材料可以是锥形的并且包括不连续的中心区域，可以是孔或可以包含非导电模具材料或包覆模制材料。 另外的实施例包括裸片，片上芯片和倒装芯片布置，用于形成集中器或偏置磁体的晶片级技术，引线框架上的诸如电容器之类的集成部件，以及具有一个或多个通道的偏置磁体，以便于 包覆成型

    CIRCUITS AND METHODS FOR GENERATING A THRESHOLD SIGNAL USED IN A MAGNETIC FIELD SENSOR BASED ON A PEAK SIGNAL ASSOCIATED WITH A PRIOR CYCLE OF A MAGNETIC FIELD SIGNAL
    2.
    发明申请
    CIRCUITS AND METHODS FOR GENERATING A THRESHOLD SIGNAL USED IN A MAGNETIC FIELD SENSOR BASED ON A PEAK SIGNAL ASSOCIATED WITH A PRIOR CYCLE OF A MAGNETIC FIELD SIGNAL 有权
    基于与磁场信号的先前周期相关的峰值信号在磁场传感器中产生阈值信号的电路和方法

    公开(公告)号：US20140145711A1

    公开(公告)日：2014-05-29

    申请号：US13685287

    申请日：2012-11-26

    申请人： Eric Burdette ,  James M. Bailey ,  Daniel S. Dwyer ,  Jeff Eagen ,  Glenn A. Forrest ,  Christine Graham ,  Eric Shoemaker ,  P. Karl Scheller

    发明人： Eric Burdette ,  James M. Bailey ,  Daniel S. Dwyer ,  Jeff Eagen ,  Glenn A. Forrest ,  Christine Graham ,  Eric Shoemaker ,  P. Karl Scheller

    IPC分类号： G01B7/14

    CPC分类号： G01B7/14 ,  G01D5/2448 ,  G01P3/488 ,  G01P3/489

    摘要： A circuit to detect a movement of an object includes a magnetic field sensing element for generating a magnetic field signal proportional to a magnetic field associated with the object and a motion detector to generate a motion signal indicative of the movement of the object. The motion detector includes a peak identifying circuit to provide a peak signal and a peak sample selection module that selects a sample associated with one or more prior cycles of a magnetic field signal to generate a selected peak signal. The motion detector further includes a threshold generator to generate a threshold signal as a function of the selected peak signal and a comparator to compare the threshold signal with the magnetic field signal to generate the motion signal. Peak samples from prior magnetic field signal cycles may be averaged for use to establish the threshold signal. A method associated with the circuit is also described.

    摘要翻译： 用于检测物体运动的电路包括用于产生与与物体相关联的磁场成比例的磁场信号的磁场感测元件和运动检测器，以产生指示物体运动的运动信号。 运动检测器包括提供峰值信号的峰值识别电路和峰值采样选择模块，其选择与磁场信号的一个或多个先前循环相关联的采样以产生所选择的峰值信号。 运动检测器还包括阈值产生器，用于根据所选择的峰值信号产生阈值信号;以及比较器，用于将阈值信号与磁场信号进行比较以产生运动信号。 来自先前磁场信号周期的峰值采样可以被平均以用于建立阈值信号。 还描述了与电路相关联的方法。

    Circuits and methods for generating a threshold signal used in a magnetic field sensor based on a peak signal associated with a prior cycle of a magnetic field signal
    4.
    发明授权
    Circuits and methods for generating a threshold signal used in a magnetic field sensor based on a peak signal associated with a prior cycle of a magnetic field signal 有权
    基于与磁场信号的先前周期相关联的峰值信号来产生在磁场传感器中使用的阈值信号的电路和方法

    公开(公告)号：US08723512B1

    公开(公告)日：2014-05-13

    申请号：US13685287

    申请日：2012-11-26

    申请人： Eric Burdette ,  James M. Bailey ,  Daniel S. Dwyer ,  Jeff Eagen ,  Glenn A. Forrest ,  Christine Graham ,  Eric Shoemaker ,  P. Karl Scheller

    发明人： Eric Burdette ,  James M. Bailey ,  Daniel S. Dwyer ,  Jeff Eagen ,  Glenn A. Forrest ,  Christine Graham ,  Eric Shoemaker ,  P. Karl Scheller

    IPC分类号： G01B7/30

    CPC分类号： G01B7/14 ,  G01D5/2448 ,  G01P3/488 ,  G01P3/489

    摘要： A circuit to detect a movement of an object includes a magnetic field sensing element for generating a magnetic field signal proportional to a magnetic field associated with the object and a motion detector to generate a motion signal indicative of the movement of the object. The motion detector includes a peak identifying circuit to provide a peak signal and a peak sample selection module that selects a sample associated with one or more prior cycles of a magnetic field signal to generate a selected peak signal. The motion detector further includes a threshold generator to generate a threshold signal as a function of the selected peak signal and a comparator to compare the threshold signal with the magnetic field signal to generate the motion signal. Peak samples from prior magnetic field signal cycles may be averaged for use to establish the threshold signal. A method associated with the circuit is also described.

    摘要翻译： 用于检测物体运动的电路包括用于产生与与物体相关联的磁场成比例的磁场信号的磁场感测元件和运动检测器，以产生指示物体运动的运动信号。 运动检测器包括提供峰值信号的峰值识别电路和峰值采样选择模块，其选择与磁场信号的一个或多个先前循环相关联的采样以产生所选择的峰值信号。 运动检测器还包括阈值产生器，用于根据所选择的峰值信号产生阈值信号;以及比较器，用于将阈值信号与磁场信号进行比较以产生运动信号。 来自先前磁场信号周期的峰值采样可以被平均以用于建立阈值信号。 还描述了与电路相关联的方法。

    Motion sensor, method, and computer-readable storage medium providing a motion sensor that adjusts gains of two circuit channels to bring the gains close to each other
    5.
    发明授权
    Motion sensor, method, and computer-readable storage medium providing a motion sensor that adjusts gains of two circuit channels to bring the gains close to each other 有权
    运动传感器，方法和计算机可读存储介质，提供运动传感器，其调节两个电路通道的增益以使增益彼此接近

    公开(公告)号：US08680848B2

    公开(公告)日：2014-03-25

    申请号：US12793163

    申请日：2010-06-03

    申请人： Andrea Foletto ,  Devon Fernandez ,  Eric Burdette

    发明人： Andrea Foletto ,  Devon Fernandez ,  Eric Burdette

    IPC分类号： G01D5/14 ,  G01D5/244 ,  G01P3/487

    CPC分类号： G01D5/14 ,  G01D5/145 ,  G01D5/2448 ,  G01P3/487 ,  G01P3/488 ,  G01P3/489 ,  G01P21/00

    摘要： A motion sensor includes an amplitude difference processor coupled to receive a first signal representative of a first one of a plurality of AGC control signals and a second signal representative of a second one of the plurality of AGC control signals. The amplitude difference processor is configured to detect if a value of the first signal is representative of a different gain than a value of the second signal by a predetermined amount. In response to the detection, the AGC processor is configured to change the value of the first one of the plurality of AGC control signals to bring its value closer to the value of the second one of the AGC control signals. A method and computer-readable storage medium can use the motion sensor.

    摘要翻译： 运动传感器包括一个振幅差分处理器，被耦合以接收表示多个AGC控制信号中的第一个的第一信号和表示多个AGC控制信号中的第二个AGC控制信号的第二信号。 幅度差处理器被配置为检测第一信号的值是否表示与第二信号的值不同的增益预定量。 响应于该检测，AGC处理器被配置为改变多个AGC控制信号中的第一个AGC控制信号的值，使其值更接近第二个AGC控制信号的值。 方法和计算机可读存储介质可以使用运动传感器。