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。

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。

公开(公告)号：US08860404B2

公开(公告)日：2014-10-14

申请号：US13526113

申请日：2012-06-18

申请人： Daniel S. Dwyer ,  Christine Graham ,  P. Karl Scheller

发明人： Daniel S. Dwyer ,  Christine Graham ,  P. Karl Scheller

IPC分类号： G01B7/30

CPC分类号： G01D5/147 ,  G01R33/072

摘要： Magnetic field sensor and related techniques can identify passing conditions, failing conditions, and marginal conditions of a sensed object. The magnetic field sensor and techniques can use one or more peak values of a proximity signal representative of proximity of the sensed object, can generate one or more difference values representative of difference between the peak values of the proximity signal and threshold values of a threshold signal proportional to the peak values, can categorize the one or more difference values into a plurality of potential categories, wherein at least one of the plurality of potential categories is representative of a respective passing self-test and wherein another at least one of the plurality of potential categories is representative of a respective marginally passing self-test, can assign category values to the plurality of potential categories, and can communicate at least one of the plurality of category values.

摘要翻译： 磁场传感器和相关技术可以识别感测对象的通过条件，故障条件和边缘条件。 磁场传感器和技术可以使用表示感测对象的接近度的接近信号的一个或多个峰值，可以产生代表接近信号的峰值与阈值信号的阈值之间的差异的一个或多个差值 与峰值成比例，可以将一个或多个差值分类为多个潜在类别，其中多个潜在类别中的至少一个代表相应的经过自检，并且其中，多个潜在类别中的至少一个 潜在类别代表相应的边缘自我测试，可以将类别值分配给多个潜在类别，并且可以传达多个类别值中的至少一个。

公开(公告)号：US20130335074A1

公开(公告)日：2013-12-19

申请号：US13526099

申请日：2012-06-18

申请人： Daniel S. Dwyer ,  Christine Graham ,  P. Karl Scheller

发明人： Daniel S. Dwyer ,  Christine Graham ,  P. Karl Scheller

IPC分类号： G01N27/72

CPC分类号： G01R33/02 ,  G01R33/0029 ,  G01R33/07

摘要： Magnetic field sensor and related techniques can identify passing conditions, failing conditions, and marginal conditions of a sensed object. The magnetic field sensor and techniques can use one or more peak values of a proximity signal representative of proximity of the object, DC offset values of the proximity signal, or threshold values related to an amplitude of a signal representative of the proximity signal to identify the conditions.

摘要翻译： 磁场传感器和相关技术可以识别感测对象的通过条件，故障条件和边缘条件。 磁场传感器和技术可以使用表示物体接近度的接近信号的一个或多个峰值，接近信号的DC偏移值或与表示接近信号的信号的幅度有关的阈值，以识别 条件。

公开(公告)号：US20130335068A1

公开(公告)日：2013-12-19

申请号：US13526113

申请日：2012-06-18

申请人： Daniel S. Dwyer ,  Christine Graham ,  P. Karl Scheller

发明人： Daniel S. Dwyer ,  Christine Graham ,  P. Karl Scheller

IPC分类号： G01R35/00

CPC分类号： G01D5/147 ,  G01R33/072

摘要： Magnetic field sensor and related techniques can identify passing conditions, failing conditions, and marginal conditions of a sensed object. The magnetic field sensor and techniques can use one or more peak values of a proximity signal representative of proximity of the object, DC offset values of the proximity signal, or threshold values related to an amplitude of a signal representative of the proximity signal to identify the conditions.

摘要翻译： 磁场传感器和相关技术可以识别感测对象的通过条件，故障条件和边缘条件。 磁场传感器和技术可以使用表示物体接近度的接近信号的一个或多个峰值，接近信号的DC偏移值或与表示接近信号的信号的幅度相关的阈值，以识别 条件。

公开(公告)号：US20130176012A1

公开(公告)日：2013-07-11

申请号：US13344052

申请日：2012-01-05

申请人： Jeff Eagen ,  Devon Fernandez ,  P. Karl Scheller

发明人： Jeff Eagen ,  Devon Fernandez ,  P. Karl Scheller

IPC分类号： G05F1/10

CPC分类号： H03K17/24 ,  H02M1/32 ,  H03K17/94

摘要： Methods and apparatus for an integrated circuit that includes a supply voltage transient detection module to activate a hold signal that causes the output to remain in its present state. In one embodiment, the output remains in that state until the supply voltage returns to a normal operating range and the hold signal transitions to an inactive state.

摘要翻译： 一种用于集成电路的方法和装置，其包括电源电压瞬变检测模块以激活使输出保持在其当前状态的保持信号。 在一个实施例中，输出保持在该状态，直到电源电压恢复到正常工作范围，并且保持信号转换到无效状态。

公开(公告)号：US09520871B2

公开(公告)日：2016-12-13

申请号：US13344052

申请日：2012-01-05

申请人： Jeff Eagen ,  Devon Fernandez ,  P. Karl Scheller

发明人： Jeff Eagen ,  Devon Fernandez ,  P. Karl Scheller

IPC分类号： H03K17/24 ,  H02M1/32 ,  H03K17/94

CPC分类号： H03K17/24 ,  H02M1/32 ,  H03K17/94

摘要： Methods and apparatus for an integrated circuit that includes a supply voltage transient detection module to activate a hold signal that causes the output to remain in its present state. In one embodiment, the output remains in that state until the supply voltage returns to a normal operating range and the hold signal transitions to an inactive state.

摘要翻译： 一种用于集成电路的方法和装置，其包括电源电压瞬变检测模块以激活使输出保持在其当前状态的保持信号。 在一个实施例中，输出保持在该状态，直到电源电压恢复到正常工作范围，并且保持信号转换到无效状态。

公开(公告)号：US06242908B1

公开(公告)日：2001-06-05

申请号：US09275209

申请日：1999-03-24

申请人： P. Karl Scheller ,  Glenn A. Forrest

发明人： P. Karl Scheller ,  Glenn A. Forrest

IPC分类号： G01P348

CPC分类号： G01D5/24476 ,  G01D3/02 ,  G01D5/145 ,  G01D5/2448 ,  G01R33/02 ,  G01V3/081 ,  H03K5/082 ,  H03M1/303

摘要： A method for detection of passing magnetic articles which includes an initial step of sensing an ambient magnetic field and generating a voltage, Vsig, proportional to the magnetic field. A threshold voltage is generated as a percentage of the peak-to-peak voltage of Vsig. The method further includes the step of generating a detector output voltage that becomes one binary level when Vsig rises to exceed the threshold voltage and another binary level when Vsig falls to below the threshold voltage. The threshold voltage is updated to track the positive and negative peaks of the Vsig voltage and is further updated by a predetermined amount upon each transition of the Vout voltage.

摘要翻译： 用于检测通过磁性制品的方法，其包括感测周围磁场并产生与磁场成比例的电压Vsig的初始步骤。 产生阈值电压作为Vsig的峰 - 峰电压的百分比。 该方法还包括以下步骤：当Vsig上升到超过阈值电压时，产生检测器输出电压，该电压变为一个二进制电平，当Vsig下降到阈值电压以下时，产生另一二进制电平。 更新阈值电压以跟踪Vsig电压的正峰值和负峰值，并且在Vout电压的每次转换时进一步更新预定量。

公开(公告)号：US09222990B2

公开(公告)日：2015-12-29

申请号：US13526099

申请日：2012-06-18

申请人： Daniel S. Dwyer ,  Christine M. Graham ,  P. Karl Scheller

发明人： Daniel S. Dwyer ,  Christine M. Graham ,  P. Karl Scheller

IPC分类号： G01B7/30 ,  G01R33/02 ,  G01R33/00 ,  G01R33/07

CPC分类号： G01R33/02 ,  G01R33/0029 ,  G01R33/07

摘要： A method of performing a self-test associated with a magnetic field sensor includes generating a proximity signal responsive to a proximity of a sensed object with one or more magnetic field sensing elements, and identifying one or more characteristic values associated with the proximity signal while the proximity signal is responding to the proximity signal, The method also includes categorizing the one or more characteristic values into three or more potential categories, including three or more categories, wherein the plurality of potential categories is representative of a plurality of discrete self-test states of the proximity signal that could occur while the proximity signal is responding to the proximity of the sensed object. The method also includes communicating at least one of the plurality of potential categories into which at least one of the one or more characteristic values was categorized. A magnetic field senor implements the above method.

摘要翻译： 执行与磁场传感器相关联的自检的方法包括响应于感测对象与一个或多个磁场感测元件的接近度而生成接近信号，以及识别与接近信号相关联的一个或多个特征值，同时 接近信号响应于接近信号。该方法还包括将一个或多个特征值分类为三个或更多个潜在类别，包括三个或更多个类别，其中多个潜在类别表示多个离散自检状态 当接近信号响应感测对象的接近时可能发生的接近信号。 所述方法还包括将所述一个或多个特征值中的至少一个分类到所述多个潜在类别中的至少一个进行通信。 磁场传感器实现上述方法。

公开(公告)号：US06693419B2

公开(公告)日：2004-02-17

申请号：US10156684

申请日：2002-05-28

申请人： Jason T. Stauth ,  P. Karl Scheller ,  Glenn A. Forrest ,  Ravi Vig ,  Jay M. Towne

发明人： Jason T. Stauth ,  P. Karl Scheller ,  Glenn A. Forrest ,  Ravi Vig ,  Jay M. Towne

IPC分类号： G01B714

CPC分类号： G01D5/24428 ,  G01V3/08

摘要： A proximity detector includes an offset circuit for bringing at least one of a magnetic field signal and a tracking signal towards the other one of the magnetic field signal and the tracking signal when the detector output signal changes state. A magnetic field-to-voltage transducer provides the magnetic field signal indicative of an ambient magnetic field and a peak detector responsive to the magnetic field signal provides the tracking signal which substantially follows the magnetic field signal. A comparator generates the detector output signal which changes state when the magnetic field signal varies from the tracking signal by a predetermined amount.

摘要翻译： 接近检测器包括偏移电路，用于当检测器输出信号改变状态时，使磁场信号和跟踪信号中的至少一个朝向另一个磁场信号和跟踪信号。 磁场电压换能器提供指示环境磁场的磁场信号，响应于磁场信号的峰值检测器提供基本上遵循磁场信号的跟踪信号。 比较器产生检测器输出信号，该信号当磁场信号从跟踪信号变化预定量时改变状态。