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1. 发明授权

US09182456B2 Magnetic field sensor for sensing rotation of an object 有权
标题翻译：用于感测物体旋转的磁场传感器
公开(公告)号：US09182456B2
公开(公告)日：2015-11-10
申请号：US13413037
申请日：2012-03-06
申请人： Eric Shoemaker , Michael C. Doogue , Andreas P. Friedrich , Andrea Foletto
发明人： Eric Shoemaker , Michael C. Doogue , Andreas P. Friedrich , Andrea Foletto
IPC分类号： G01P3/00 , G01R33/07 , G01D5/14 , G01D5/244
CPC分类号： G01R33/077 , G01D5/145 , G01D5/24438 , G01R33/075
摘要： A magnetic field sensor uses an angle sensor to measure and angle of rotation of a target object to which a magnet is attached. The angle sensor in combination with electronics can generate an angle sensor output signal related to a direction of a magnetic field of the magnet. The angle sensor output signal can be compared to thresholds to generate a magnetic field sensor output signal the same as a known true power on state (TPOS) sensor output signal. A corresponding method is also described.
摘要翻译：磁场传感器使用角度传感器来测量和附着磁体的目标物体的旋转角度。与电子装置组合的角度传感器可以产生与磁体的磁场方向相关的角度传感器输出信号。角度传感器输出信号可以与阈值进行比较，以产生与已知的真电源开启状态（TPOS）传感器输出信号相同的磁场传感器输出信号。还描述了相应的方法。

2. 发明申请

US20140175584A1 MAGNETIC FIELD SENSOR AND METHOD OF FABRICATING A MAGNETIC FIELD SENSOR HAVING A PLURALITY OF VERTICAL HALL ELEMENTS ARRANGED IN AT LEAST A PORTION OF A POLYGONAL SHAPE 有权
标题翻译：磁场传感器和制造具有多个垂直厚度元件的磁场传感器的方法至少在多边形形状的部分
公开(公告)号：US20140175584A1
公开(公告)日：2014-06-26
申请号：US13724170
申请日：2012-12-21
申请人： Andrea Foletto , Andreas P. Friedrich , Nicolas Yoakim
发明人： Andrea Foletto , Andreas P. Friedrich , Nicolas Yoakim
IPC分类号： G01B7/30 , H01L29/82
CPC分类号： H01L29/82 , G01R33/0023 , G01R33/077
摘要： A magnetic field sensor has a plurality of vertical Hall elements arranged in at least a portion of a polygonal shape. The magnetic field sensor includes an electronic circuit to process signals generated by the plurality of vertical Hall elements to identify a direction of a magnetic field. A corresponding method of fabricating the magnetic field sensor is also described.
摘要翻译：磁场传感器具有布置在多边形形状的至少一部分中的多个垂直霍尔元件。磁场传感器包括用于处理由多个垂直霍尔元件产生的信号以识别磁场方向的电子电路。还描述了制造磁场传感器的相应方法。

3. 发明申请

US20130320970A1 GEAR TOOTH SENSOR WITH PEAK AND THRESHOLD DETECTORS 有权
标题翻译：齿轮传感器与峰值和阈值检测器
公开(公告)号：US20130320970A1
公开(公告)日：2013-12-05
申请号：US13484501
申请日：2012-05-31
申请人： Andrea Foletto , Michael Morris , Mathew Drouin , Devon Fernandez , Andreas P. Friedrich , P. Karl Scheller
发明人： Andrea Foletto , Michael Morris , Mathew Drouin , Devon Fernandez , Andreas P. Friedrich , P. Karl Scheller
IPC分类号： G01R33/06 , G01R33/02
CPC分类号： G01D5/2448 , G01D5/145
摘要： Presented herein is a magnetic field sensor architecture that uses outputs of a peak detector and threshold detector operating in parallel to detect magnetic anomalies that may be associated with the target being sensed, e.g., a rotational ferromagnetic object such as a toothed gear, and use such detection to prevent sensor malfunction. The sensor includes an edge detection circuit and an error detection circuit. In one embodiment, the edge detection circuit includes circuits to detect edges (or transitions) of the threshold and peak detector output signals and the error detection circuit includes circuits, responsive to the edge detection circuit, to indicate an error when a “missed transition” occurs or a peak-to-peak value of an input signal as detected by the peak detector for a current cycle differs from an expected peak-to-peak value by a predetermined amount.
摘要翻译：这里呈现的是一种磁场传感器架构，其使用平行操作的峰值检测器和阈值检测器的输出来检测可能与感测到的目标相关联的磁异常，例如旋转铁磁物体，例如齿轮，并使用检测以防止传感器故障。传感器包括边缘检测电路和错误检测电路。在一个实施例中，边缘检测电路包括用于检测阈值和峰值检测器输出信号的边缘（或转换）的电路，并且误差检测电路包括响应于边缘检测电路的指示当“错过转换” 或由峰值检测器为当前周期检测的输入信号的峰 - 峰值与期望的峰 - 峰值不同预定量。

4. 发明申请

US20130265041A1 HIGH ACCURACY DIFFERENTIAL CURRENT SENSOR FOR APPLICATIONS LIKE GROUND FAULT INTERRUPTERS 有权
标题翻译：高精度差分电流传感器应用类似接地故障中断
公开(公告)号：US20130265041A1
公开(公告)日：2013-10-10
申请号：US13439094
申请日：2012-04-04
申请人： Andreas P. Friedrich , Andrea Foletto , P. Karl Scheller , William P. Taylor , Michael C. Doogue
发明人： Andreas P. Friedrich , Andrea Foletto , P. Karl Scheller , William P. Taylor , Michael C. Doogue
IPC分类号： G01R19/00
CPC分类号： G01R15/207
摘要： A sensor with multiple magnetic field sensing elements for use in current sensing and other applications is presented. In one configuration, the sensor can obtain differential and absolute current measurements of current in current-carrying conductors. When employed in a ground fault interrupter (GFI) application, a first magnetic field sensing element can be used to measure the absolute current flowing in the phase conductor (phase current), a second magnetic field sensing element can be used to measure the absolute current flowing in the neutral conductor (neutral current) and a difference between the phase and neutral currents can be measured by a third magnetic field sensing element or determined from measurements of the first and second magnetic field sensing elements. In another configuration, the sensor can obtain a measure of the difference between currents and/or the sum of currents in current-carrying conductors.
摘要翻译：提出了一种用于电流检测和其他应用的具有多个磁场感测元件的传感器。在一种配置中，传感器可以获得载流导体中电流的差分和绝对电流测量。当用于接地故障断续器（GFI）应用时，可以使用第一磁场感测元件来测量在相导体（相电流）中流动的绝对电流，第二磁场感测元件可用于测量绝对电流在中性导体（中性电流）中流动，并且相电流和中性电流之间的差异可以由第三磁场感测元件测量或者由第一和第二磁场感测元件的测量确定。在另一种配置中，传感器可以获得电流差和/或载流导体中电流之和的量度。

5. 发明申请

US20120249133A1 DIFFERENTIAL MAGNETIC FIELD SENSOR STRUCTURE FOR ORIENTATION INDEPENDENT MEASUREMENT 有权
标题翻译：用于方位独立测量的差分磁场传感器结构
公开(公告)号：US20120249133A1
公开(公告)日：2012-10-04
申请号：US13078200
申请日：2011-04-01
申请人： Andreas P. Friedrich
发明人： Andreas P. Friedrich
IPC分类号： G01R33/02
CPC分类号： G01R33/0005 , G01R33/0029 , G01R33/072 , G01R33/091
摘要： A differential magnetic field sensor that enables operation that is independent of sensor-to-target orientation is presented. The differential magnetic field sensor is provided with at least two differential channels. Each differential channel includes a pair of magnetic field sensing elements and has a respective sensing axis defined by those magnetic field sensing elements. The sensing axes are not aligned with respect to each other. One sensing axis is positioned relative to a reference axis of a target profile to define an orientation angle between the sensing axis and the reference axis. The differential magnetic field sensor includes circuitry to produce differential signals associated with the differential channels and use those differential signals to produce a single differential signal having an amplitude that is independent of the orientation angle.
摘要翻译：介绍了一种差分磁场传感器，可实现与传感器到目标方向无关的操作。差分磁场传感器设置有至少两个差分通道。每个差分通道包括一对磁场感测元件，并且具有由那些磁场感测元件限定的相应感测轴。检测轴不相对于彼此对准。一个感测轴相对于目标轮廓的参考轴定位，以限定感测轴和参考轴之间的取向角。差分磁场传感器包括产生与差分通道相关的差分信号的电路，并使用这些差分信号产生具有独立于取向角的幅度的单个差分信号。

6. 发明申请

US20090019330A1 INTEGRATED CIRCUIT HAVING BUILT-IN SELF-TEST FEATURES 有权
标题翻译：具有内置自检功能的集成电路
公开(公告)号：US20090019330A1
公开(公告)日：2009-01-15
申请号：US11777406
申请日：2007-07-13
申请人： Andreas P. Friedrich , Andrea Foletto , P. Karl Scheller , Paul David
发明人： Andreas P. Friedrich , Andrea Foletto , P. Karl Scheller , Paul David
IPC分类号： G01R31/28
CPC分类号： G01R31/318511 , G01R31/3187
摘要： An integrated circuit includes a sensor for providing a sensor output signal and a diagnostic circuit coupled to the sensor for providing a self-diagnostic signal. The self-diagnostic signal comprises the sensor output signal during a first time duration and an inverted sensor output signal during a second different time duration.
摘要翻译：集成电路包括用于提供传感器输出信号的传感器和耦合到传感器的诊断电路，用于提供自诊断信号。自诊断信号包括在第一持续时间期间的传感器输出信号和在第二不同持续时间期间的反向传感器输出信号。

7. 发明授权

US08749005B1 Magnetic field sensor and method of fabricating a magnetic field sensor having a plurality of vertical hall elements arranged in at least a portion of a polygonal shape 有权
标题翻译：磁场传感器和制造具有以多边形形状的至少一部分布置的多个垂直霍尔元件的磁场传感器的方法
公开(公告)号：US08749005B1
公开(公告)日：2014-06-10
申请号：US13724170
申请日：2012-12-21
申请人： Andrea Foletto , Andreas P. Friedrich , Nicolas Yoakim
发明人： Andrea Foletto , Andreas P. Friedrich , Nicolas Yoakim
IPC分类号： H01L29/82 , H01L43/06 , G01R33/07
CPC分类号： H01L29/82 , G01R33/0023 , G01R33/077
摘要： A magnetic field sensor has a plurality of vertical Hall elements arranged in at least a portion of a polygonal shape. The magnetic field sensor includes an electronic circuit to process signals generated by the plurality of vertical Hall elements to identify a direction of a magnetic field. A corresponding method of fabricating the magnetic field sensor is also described.
摘要翻译：磁场传感器具有布置在多边形形状的至少一部分中的多个垂直霍尔元件。磁场传感器包括用于处理由多个垂直霍尔元件产生的信号以识别磁场方向的电子电路。还描述了制造磁场传感器的相应方法。

8. 发明授权

US08598867B2 Circuits and methods for generating a threshold signal used in a motion detector 有权
标题翻译：用于产生在运动检测器中使用的阈值信号的电路和方法
公开(公告)号：US08598867B2
公开(公告)日：2013-12-03
申请号：US12793813
申请日：2010-06-04
申请人： Andrea Foletto , Andreas P. Friedrich
发明人： Andrea Foletto , Andreas P. Friedrich
IPC分类号： G01B7/30
CPC分类号： G01B7/14 , G01D5/145 , G01D5/24476 , G01P3/488 , G01P3/489
摘要： A circuit to detect a movement of an object provides a threshold selection module that uses one or more threshold signals identified prior to a present cycle of magnetic field signal in order to establish a threshold signal used for a present cycle of the magnetic field signal. A method associated with the circuit is also described.
摘要翻译：用于检测物体的移动的电路提供阈值选择模块，该阈值选择模块使用在磁场信号的当前周期之前识别的一个或多个阈值信号，以便建立用于磁场信号的当前周期的阈值信号。还描述了与电路相关联的方法。

9. 发明申请

US20110298450A1 Circuits and Methods for Generating a Threshold Signal Used in a Motion Detector 有权
标题翻译：用于生成运动检测器中使用的阈值信号的电路和方法
公开(公告)号：US20110298450A1
公开(公告)日：2011-12-08
申请号：US12793813
申请日：2010-06-04
申请人： Andrea Foletto , Andreas P. Friedrich
发明人： Andrea Foletto , Andreas P. Friedrich
IPC分类号： G01B7/14 , H03M1/12
CPC分类号： G01B7/14 , G01D5/145 , G01D5/24476 , G01P3/488 , G01P3/489
摘要： A circuit to detect a movement of an object provides a threshold selection module that uses one or more threshold signals identified prior to a present cycle of magnetic field signal in order to establish a threshold signal used for a present cycle of the magnetic field signal. A method associated with the circuit is also described.
摘要翻译：用于检测物体的移动的电路提供阈值选择模块，该阈值选择模块使用在磁场信号的当前周期之前识别的一个或多个阈值信号，以便建立用于磁场信号的当前周期的阈值信号。还描述了与电路相关联的方法。

10. 发明授权

US10234513B2 Magnetic field sensor integrated circuit with integral ferromagnetic material 有权
公开(公告)号：US10234513B2
公开(公告)日：2019-03-19
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 , G01B7/30 , G01R33/00
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.

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