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    Peak-to-peak signal detector
    1.
    发明授权
    Peak-to-peak signal detector 有权
    峰峰值信号检测器

    公开(公告)号：US06919720B2

    公开(公告)日：2005-07-19

    申请号：US10347902

    申请日：2003-01-21

    申请人： Ravi Vig ,  Jay M. Towne ,  Michael C. Doogue

    发明人： Ravi Vig ,  Jay M. Towne ,  Michael C. Doogue

    IPC分类号： G01R19/04 ,  G01D5/14 ,  G01D5/244 ,  G01P3/488 ,  G01P3/489 ,  H03K5/08 ,  G01R33/00

    CPC分类号： G01D5/24457 ,  G01D5/145 ,  G01P3/488 ,  G01P3/489 ,  G01P21/02 ,  H03K5/082

    摘要： A detector to determine the peak-to-peak value of a signal is presented. The detector includes a first circuit to provide a tracking signal that tracks a positive slope of the signal during a first time interval and a negative slope of the signal during a second time interval. The detector further includes a second circuit configured to produce values associated with the tracking signal provided during one of the first and second time intervals, where one of the values is indicative of the peak-to-peak value of the signal.

    摘要翻译： 提出了一种用于确定信号的峰 - 峰值的检测器。 检测器包括第一电路，用于提供在第一时间间隔期间跟踪信号的正斜率和在第二时间间隔期间信号的负斜率的跟踪信号。 检测器还包括第二电路，其被配置为产生与在第一和第二时间间隔期间提供的跟踪信号相关联的值，其中值之一表示信号的峰 - 峰值。

    Method and apparatus for providing information from a speed and direction sensor
    2.
    发明授权
    Method and apparatus for providing information from a speed and direction sensor 有权
    用于从速度和方向传感器提供信息的方法和装置

    公开(公告)号：US07026808B2

    公开(公告)日：2006-04-11

    申请号：US10948808

    申请日：2004-09-23

    申请人： Ravi Vig ,  Jay M. Towne ,  Glenn Forrest

    发明人： Ravi Vig ,  Jay M. Towne ,  Glenn Forrest

    IPC分类号： G01P3/66 ,  G01B7/14

    CPC分类号： G01D5/24457 ,  G01D5/145 ,  G01P3/488 ,  H03K5/082

    摘要： A method and apparatus for providing information from a speed and direction sensor is disclosed. The method and apparatus detect the presence of a ferromagnetic object as it moves past a sensor. The sensor determines speed and direction information regarding the ferromagnetic object, and further provides information relating to the environment surrounding the sensor or object, such as the status of an air gap between the sensor and the moving object, and the temperature of the environment in which the sensor or object is disposed.

    摘要翻译： 公开了一种从速度和方向传感器提供信息的方法和装置。 该方法和装置在铁磁物体移动经过传感器时检测其存在。 传感器确定关于铁磁物体的速度和方向信息，并且还提供与传感器或物体周围的环境有关的信息，例如传感器和移动物体之间的气隙的状态，以及环境的温度，其中 设置传感器或物体。

    Detection of passing magnetic articles with a peak referenced threshold detector
    3.
    发明授权
    Detection of passing magnetic articles with a peak referenced threshold detector 有权
    用峰值参考阈值检测器检测通过磁性物品

    公开(公告)号：US6091239A

    公开(公告)日：2000-07-18

    申请号：US387683

    申请日：1999-08-31

    申请人： Ravi Vig ,  Jay M. Towne ,  Kristann L. Moody ,  Teri L. Tu

    发明人： Ravi Vig ,  Jay M. Towne ,  Kristann L. Moody ,  Teri L. Tu

    IPC分类号： F02P17/02 ,  G01B7/14 ,  G01B7/30 ,  G01P3/48 ,  G01P3/489 ,  H03G1/00

    CPC分类号： H03K5/082 ,  G01R33/0041 ,  H03G3/001 ,  H03K17/9517 ,  H03K5/153

    摘要： A detector for detecting passing magnetic articles including a magnetic-field-to-voltage transducer having an output at which an analog voltage Vsig is generated, with the Vsig voltage being commensurate to the strength of the ambient magnetic field and having at least one peak. An analog-to-digital converter coupled to the output of the transducer is operative to convert to a corresponding digital signal at least a portion of the Vsig voltage, which portion includes the peak and a circuit coupled to the analog-to-digital converter is operative to generate an output signal indicative of the occurrence of the times t.sub.xpk when the difference between Vsig and said peak of Vsig has exceeded a predetermined amount.

    摘要翻译： 一种用于检测通过的磁性制品的检测器，包括具有产生模拟电压Vsig的输出的磁场 - 电压换能器，其中Vsig电压与环境磁场的强度相当并具有至少一个峰值。 耦合到换能器的输出的模数转换器可操作以将Vsig电压的至少一部分转换成对应的数字信号，该部分包括峰值，并且耦合到模数转换器的电路是 用于当Vsig与所述Vsig的峰值之间的差超过预定量时，产生指示时刻txpk的出现的输出信号。

    Tracking and holding in a DAC the peaks in the field-proportional voltage in a slope activated magnetic field sensor
    4.
    发明授权
    Tracking and holding in a DAC the peaks in the field-proportional voltage in a slope activated magnetic field sensor 失效
    在DAC中跟踪并保持斜率激励的磁场传感器中的场成比例电压中的峰值

    公开(公告)号：US5729130A

    公开(公告)日：1998-03-17

    申请号：US587405

    申请日：1996-01-17

    申请人： Kristann L. Moody ,  Ravi Vig ,  Jay M. Towne ,  Teri L. Tu

    发明人： Kristann L. Moody ,  Ravi Vig ,  Jay M. Towne ,  Teri L. Tu

    IPC分类号： G01B7/00 ,  G01D5/14 ,  G01D5/244 ,  G01D5/245 ,  G01V3/08 ,  H03K17/95 ,  G01B7/14 ,  G01N27/72 ,  G01R33/00

    CPC分类号： H03K17/9517 ,  G01D5/145

    摘要： In a proximity-detector, a Hall transducer produces a signal Vsig. Two counters, P-counter and N-counter count pulses from a clock and produce count signals respectively to two DACs, PDAC and NDAC. The DACs output signals track and hold, respectively, the positive pulses and negative pulses in Vsig. These output signals are compared with Vsig to produce a proximity-detector binary output voltage Vout that becomes high when a tracking voltage V.sub.DAC-P produced by PDAC rises to each peak positive voltage V.sub.pk in Vsig, and that becomes low when a tracking voltage V.sub.DAC-P falls to each peak negative voltage in Vsig. The peak V.sub.DAC-P is held until Vsig drops by a fixed amount below V.sub.pk to produce an output pulse that resets the counter connected to PDAC at a time shortly following the actual peak in Vsig. Similarly, the peak V.sub.DAC-N is held until Vsig rises a fixed amount above V.sub.DAC-N to produce an output pulse that resets the counter connected to NDAC. The N-counter is reset at t.sub.npk by the negative-peak indicating signal V.sub.Ncomp and is enabled at t.sub.ppk by the positive-peak indicating signal V.sub.Pcomp, while the P-counter reset by the positive peak indicating signal V.sub.Pcomp and enabled by V.sub.Ncomp. This proximity detector detects articles passing at rates down to zero.

    摘要翻译： 在接近检测器中，霍尔传感器产生信号Vsig。 两个计数器，来自时钟的P计数器和N计数器计数脉冲，并分别产生计数信号到两个DAC，PDAC和NDAC。 DACs输出信号分别跟踪和保持Vsig中的正脉冲和负脉冲。 将这些输出信号与Vsig进行比较，以产生当由PDAC产生的跟踪电压VDAC-P上升到Vsig中的每个峰值正电压Vpk时变为高的接近检测器二进制输出电压Vout，并且当跟踪电压VDAC- P降至Vsig中的每个峰值负电压。 峰值VDAC-P保持直到Vsig下降到低于Vpk的固定量，以产生输出脉冲，该脉冲在与Vsig实际峰值之后不久的时间重置连接到PDAC的计数器。 类似地，保持峰值VDAC-N直到Vsig上升到高于VDAC-N的固定量以产生输出脉冲，其复位与NDAC连接的计数器。 N计数器在tnpk处由负峰指示信号VNcomp复位，并在tppk由正峰指示信号VPcomp使能，而P计数器由正峰值指示信号VPcomp复位并由VNcomp使能。 该接近检测器检测以低至零的速率通过的物品。

    Detector of passing magnetic articles with automatic gain control
    5.
    发明授权
    Detector of passing magnetic articles with automatic gain control 失效
    带有自动增益控制的磁性物品检测器

    公开(公告)号：US5694038A

    公开(公告)日：1997-12-02

    申请号：US587406

    申请日：1996-01-17

    申请人： Kristann L. Moody ,  Ravi Vig ,  P. Karl Scheller ,  Jay M. Towne ,  Teri L. Tu

    发明人： Kristann L. Moody ,  Ravi Vig ,  P. Karl Scheller ,  Jay M. Towne ,  Teri L. Tu

    IPC分类号： G01B7/00 ,  G01D3/02 ,  G01D5/14 ,  G01D5/244 ,  G01D5/245 ,  G01V3/08 ,  H03K17/95 ,  H03M1/30 ,  G01B7/30 ,  F02P17/02 ,  G01P3/489 ,  H03G1/00

    CPC分类号： G01D5/2448 ,  G01D3/02 ,  G01D5/145 ,  H03M1/303

    摘要： A magnetic-field-to-voltage transducer includes a Hall element and a digitally gain-controlled Hall-voltage amplifier that produces an analog voltage Vsig having excursions of one polarity corresponding to the passing of magnetic articles. Vsig is applied to the input of a signal-manipulating circuit that generates a proximity- detector binary output voltage, Vout, having transitions of one direction each time a predetermined point is reached in Vsig. A digitally gain-controlled gain amplifier is connected to the Hall element. A comparator circuit generates a binary signal Vbig (or V.sub.toobig) that changes from one to another binary level each time that Vsig exceeds a DC target voltage, V.sub.TG. The AGC circuit senses and counts gain counter excursions of one polarity in Vsig, and produces a binary count output signal at the input of the gain amplifier at each of the counted excursions in Vsig, incrementally changing the transducer gain in the direction to bring the peaks in Vsig to just below the target value T.sub.TG. This AGC feature prevents saturating the amplifier and quickly renders a Vsig of essentially constant amplitude so that either the peak excursion values or predetermined threshold levels in Vsig, at which transitions in the proximity detector output voltage Vout are caused to occur, provide greater accuracy and stability in the correlation between detection-approach and -withdrawal distances and transitions in Vout.

    摘要翻译： 磁场电压换能器包括霍尔元件和数字增益控制的霍尔电压放大器，其产生具有与磁性物品通过相对应的一个极性的偏移的模拟电压Vsig。 Vsig被施加到信号处理电路的输入端，该信号处理电路产生接近检测器二进制输出电压Vout，每当Vsig达到预定点时具有一个方向的转变。 数字增益控制增益放大器连接到霍尔元件。 比较器电路每当Vsig超过DC目标电压VTG时产生从一个到另一个二进制电平的二进制信号Vbig（或Vtoobig）。 AGC电路感测并计数Vsig中的一个极性的增益计数器偏移，并且在Vsig的每个计数偏移量的增益放大器的输入处产生二进制计数输出信号，在方向上递增地改变换能器增益以使峰值 在Vsig中低于目标值TTG。 该AGC功能可防止放大器饱和，并快速渲染基本上恒定幅度的Vsig，使得导致接近检测器输出电压Vout发生转换的Vsig中的峰值偏移值或预定阈值电平提供更高的精度和稳定性 在Vout中的检测方法与取出距离和转换之间的相关性。

    Magnetic Field Sensor Integrated Circuit with Integral Ferromagnetic Material
    6.
    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

    Contactless magnet-activated proportional controller
    9.
    发明授权
    Contactless magnet-activated proportional controller 失效
    非接触式磁铁比例控制器

    公开(公告)号：US5264783A

    公开(公告)日：1993-11-23

    申请号：US823094

    申请日：1992-01-21

    申请人： Ravi Vig ,  Mark C. Hopkins ,  Jay M. Towne

    发明人： Ravi Vig ,  Mark C. Hopkins ,  Jay M. Towne

    IPC分类号： G05F1/635 ,  H03K17/90

    CPC分类号： G05F1/635

    摘要： An electrical power controller includes an integrated circuit having a Hall element, a Hall voltage amplifier, a ramp signal generator, and a voltage comparator. The output of the ramp generator is connected to one input of the voltage comparator and the output of the Hall voltage amplifier is connected to the outer comparator input. During intervals when the amplified Hall voltage exceeds the ramp voltage, the output of the comparator changes from one binary state to the other such that a stream of pulses is generated at the output of the comparator. Thus as a magnetic field at the Hall element increases, the Hall voltage increases and the width of each pulse in the stream of pulses grows proportionally. Mechanical means is provided for manually moving and guiding the pole of a magnet along a path toward the integrated circuit. Constructions of such controllers adapted for use as lamp dimmers and DC motor speed controllers are described.

    摘要翻译： 电力控制器包括具有霍尔元件，霍尔电压放大器，斜坡信号发生器和电压比较器的集成电路。 斜坡发生器的输出连接到电压比较器的一个输入端，霍尔电压放大器的输出端连接到外部比较器输入。 在放大的霍尔电压超过斜坡电压的间隔期间，比较器的输出从一个二进制状态变为另一个，使得在比较器的输出端产生脉冲流。 因此，当霍尔元件的磁场增加时，霍尔电压增加，并且脉冲流中的每个脉冲的宽度成比例地增长。 提供了用于沿着朝向集成电路的路径手动地移动和引导磁体的磁极的机械装置。 描述适用于灯调光器和直流电动机速度控制器的这种控制器的结构。

    Detection of passing magnetic articles with a peak-to-peak percentage threshold detector having a forcing circuit and automatic gain control
    10.
    发明授权
    Detection of passing magnetic articles with a peak-to-peak percentage threshold detector having a forcing circuit and automatic gain control 有权
    用具有强制电路和自动增益控制的峰 - 峰百分比阈值检测器检测通过的磁性制品

    公开(公告)号：US06297627B1

    公开(公告)日：2001-10-02

    申请号：US09239023

    申请日：1999-01-27

    申请人： Jay M. Towne ,  Ravi Vig ,  P. Karl Scheller

    发明人： Jay M. Towne ,  Ravi Vig ,  P. Karl Scheller

    IPC分类号： G01P348

    CPC分类号： H03K5/082 ,  G01R33/0041 ,  H03G3/001 ,  H03K5/153 ,  H03K17/9517

    摘要： A proximity detector for sensing a magnetic field includes a magnetic-field-to-voltage transducer for generating a signal voltage Vsig that is proportional to the magnetic field, a peak-to-peak percentage threshold detector coupled to the magnetic-field-to-voltage transducer to receive the signal voltage Vsig and for providing an output signal voltage Vout and a forcing circuit coupled to the peak-to-peak percentage threshold detector for forcing and maintaining the value of the output signal voltage Vout at a predetermined value during an initial startup interval of the proximity detector. The proximity detector may further include an automatic gain control circuit coupled to the forcing circuit to provide a proximity detector capable of operating in a peak-to-peak percentage threshold detector mode with automatic gain control.

    摘要翻译： 用于感测磁场的接近检测器包括用于产生与磁场成比例的信号电压Vsig的磁场 - 电压转换器，耦合到磁场 - 电压 - 电压传感器以接收信号电压Vsig，并用于提供输出信号电压Vout和耦合到峰 - 峰百分比阈值检测器的强制电路，用于在初始期间将输出信号电压Vout的值强制并保持在预定值 接近检测器的启动间隔。 接近检测器还可以包括耦合到强制电路的自动增益控制电路，以提供能够以具有自动增益控制的峰 - 峰百分比阈值检测器模式操作的接近检测器。