公开(公告)号：US11677032B2

公开(公告)日：2023-06-13

申请号：US17806758

申请日：2022-06-14

Applicant: Allegro MicroSystems, LLC

Inventor： Ravi Vig ,  William P. Taylor ,  Paul A. David ,  P. Karl Scheller ,  Andreas P. Friedrich

IPC: H01L29/82 ,  G01R33/06 ,  G01R33/00 ,  G01D5/14 ,  G01R15/20

CPC classification number: H01L29/82 ,  G01D5/147 ,  G01R33/0047 ,  G01R33/0052 ,  G01R33/06 ,  G01R15/207 ,  H01L2224/45147 ,  H01L2224/48247 ,  H01L2924/00011 ,  H01L2224/45147 ,  H01L2924/00 ,  H01L2924/00011 ,  H01L2924/01033

Abstract: A sensor includes a lead frame having a first surface, a second opposing surface, and a plurality of leads and a semiconductor die having a first surface attached to the first surface of the lead frame and a second, opposing surface. The sensor further includes a non-conductive mold material enclosing the die and at least a portion of the lead frame, a conductive coil secured to the non-conductive mold material, a mold material secured to the non-conductive mold material and enclosing the conductive coil, wherein the mold material has a central region and an element disposed in the central region of the mold material.

公开(公告)号：US20210247478A1

公开(公告)日：2021-08-12

申请号：US16788505

申请日：2020-02-12

Applicant: Allegro MicroSystems, LLC

Inventor： P. Karl Scheller ,  Devon Fernandez

IPC: G01R35/00 ,  G01D5/14 ,  G01D5/16

Abstract: A sensor includes a detector configured to sense a parameter, at least one test circuit configured to detect a respective fault condition of the sensor and generate a fault signal in response to detecting the fault condition, a checker configured to test the at least one test circuit to determine the operational status of the at least one test circuit, and an output signal generator, coupled to receive the sensed parameter, the fault signal, and the operational status of the at least one test circuit. The output signal generator is configured to generate an output signal of the sensor to communicate the sensed parameter and the operational status of the at least one test circuit.

公开(公告)号：US20200379061A1

公开(公告)日：2020-12-03

申请号：US16994864

申请日：2020-08-17

Applicant: Allegro MicroSystems, LLC

Inventor： P. Karl Scheller ,  James E. Burgess ,  Steven E. Snyder ,  Kristann L. Moody ,  Devon Fernandez ,  Andrea Foletto

IPC: G01R33/00 ,  G01D5/244 ,  G01P3/487 ,  G01P3/488 ,  G01P21/02 ,  G01R23/00 ,  G01P3/44 ,  G01P13/00 ,  G01R33/06

Abstract: Systems, methods, and apparatuses for magnetic field sensors with self-test include a detection circuit to detect speed and direction of a target. One or more circuits to test accuracy of the detected speed and direction may be included. One or more circuits to test accuracy of an oscillator may also be included. One or more circuits to test the accuracy of an analog-to-digital converter may also be included. Additionally, one or more IDDQ and/or built-in-self test (BIST) circuits may be included.

公开(公告)号：US10571301B2

公开(公告)日：2020-02-25

申请号：US15655400

申请日：2017-07-20

Applicant: Allegro MicroSystems, LLC

Inventor： Michael C. Doogue ,  P. Karl Scheller

IPC: G01D5/14 ,  G01P3/487 ,  G01R33/07 ,  G01D5/165 ,  G01R33/09 ,  G01D3/08 ,  G01P13/04

Abstract: In one aspect, an integrated circuit (IC) includes a magnetic field sensor to detect speed and direction of angular rotation of a rotating magnetic structure. The magnetic field sensor includes at least two magnetic field sensing elements configured to sense changes in a magnetic field caused by rotation of the magnetic structure. The IC also includes an output port configured to provide an output signal of the magnetic field sensor. The frequency of the output signal indicates the speed and the direction or indicates a fault.

公开(公告)号：US09810519B2

公开(公告)日：2017-11-07

申请号：US13946380

申请日：2013-07-19

Applicant: Allegro Microsystems, LLC

Inventor： William P. Taylor ,  P. Karl Scheller ,  Paul David

IPC: G01B7/14 ,  G01R33/07 ,  G01R33/09 ,  G01D5/14 ,  G01R33/06

CPC classification number: G01B7/146 ,  G01D5/147 ,  G01R33/06 ,  G01R33/07 ,  G01R33/09

Abstract: A variety of magnetic field sensor arrangements provide so-called “tooth detectors” using a simple low-cost magnet.

公开(公告)号：US20160377663A1

公开(公告)日：2016-12-29

申请号：US14748692

申请日：2015-06-24

Applicant: ALLEGRO MICROSYSTEMS, LLC

Inventor： Jay M. Towne ,  Sam Tran ,  P. Karl Scheller

IPC: G01R19/165 ,  G01R31/28 ,  G01R31/40

CPC classification number: G01R19/165 ,  G01D5/145 ,  G01R31/28 ,  G01R31/40 ,  G01R33/02

Abstract: A monitor circuit for monitoring a level of a first and second regulated source may monitor a voltage level of regulated voltages or a current level of regulated currents. In an embodiment, the monitor circuit includes circuitry responsive to a first regulated voltage and to a second regulated voltage. A first circuit responsive to the first regulated voltage and to the second regulated voltage generates a first error signal indicative of at least one of an overvoltage condition of the first regulated voltage and an undervoltage condition of the second regulated voltage. A second circuit responsive to the first regulated voltage and to the second regulated voltage generates a second error signal indicative of at least one of an undervoltage condition of the first regulated voltage and an overvoltage condition of the second regulated voltage. A method for monitoring the levels of first and second regulated sources is also provided.

Abstract translation: 用于监测第一和第二调节源的电平的监视器电路可以监视调节电压的电压电平或电流的调节电流。 在一个实施例中，监视器电路包括响应于第一调节电压和第二调节电压的电路。 响应于第一调节电压和第二调节电压的第一电路产生指示第一调节电压的过电压状态和第二调节电压的欠压状态中的至少一个的第一误差信号。 响应于第一调节电压和第二调节电压的第二电路产生指示第一调节电压的欠压状态和第二调节电压的过电压状态中的至少一个的第二误差信号。 还提供了用于监测第一和第二调节源的水平的方法。

公开(公告)号：US09476899B2

公开(公告)日：2016-10-25

申请号：US14452823

申请日：2014-08-06

Applicant: Allegro MicroSystems, LLC

Inventor： Devon Fernandez ,  Michael Morris ,  William P. Taylor ,  P. Karl Scheller

IPC: G01R33/00 ,  G01P13/00 ,  G01B7/00 ,  G01B7/30 ,  G01P3/44 ,  G01P3/488 ,  G01P3/489 ,  G01D5/14 ,  G01D5/244

CPC classification number: G01P13/00 ,  G01B7/003 ,  G01B7/30 ,  G01D5/145 ,  G01D5/2448 ,  G01P3/44 ,  G01P3/488 ,  G01P3/489

Abstract: A circuit to detect a movement of an object provides a threshold selection module or a peak identifier 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. The circuit and method can be tailored to store values associated with a least common multiple of a set of possible quantities of detectable features on target objects.

Abstract translation: 用于检测物体的移动的电路提供阈值选择模块或峰值识别器模块，其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，以便建立用于当前周期的阈值信号 磁场信号。 还描述了与电路相关联的方法。 电路和方法可以被定制以存储与目标对象上可检测特征的一组可能数量的最小公倍数相关联的值。

公开(公告)号：US08994369B2

公开(公告)日：2015-03-31

申请号：US14093815

申请日：2013-12-02

Applicant: Allegro Microsystems, LLC

Inventor： Ravi Vig ,  P. Karl Scheller ,  Paul A. David

IPC: G01B7/30 ,  G01R33/07 ,  G01P3/48 ,  G01P3/44 ,  G01P3/488 ,  G01P3/489 ,  G01P13/04

CPC classification number: G01P3/44 ,  G01D5/142 ,  G01P3/488 ,  G01P3/489 ,  G01P13/045 ,  G01R33/0041 ,  G01R33/07

Abstract: An apparatus and a method provide an output signal indicative of a speed of rotation and a direction of rotation of a ferromagnetic object capable of rotating. A variety of signal formats of the output signal are described.

公开(公告)号：US20140084903A1

公开(公告)日：2014-03-27

申请号：US14093787

申请日：2013-12-02

Applicant: Allegro Microsystems, LLC

Inventor： Ravi Vig ,  P. Karl Scheller ,  Paul A. David

IPC: G01P3/44 ,  G01R33/07

CPC classification number: G01P3/44 ,  G01D5/142 ,  G01P3/488 ,  G01P3/489 ,  G01P13/045 ,  G01R33/0041 ,  G01R33/07

Abstract: An apparatus and a method provide an output signal indicative of a speed of rotation and a direction of rotation of a ferromagnetic object capable of rotating. A variety of signal formats of the output signal are described.

公开(公告)号：US11243234B2

公开(公告)日：2022-02-08

申请号：US17061602

申请日：2020-10-02

Applicant: Allegro MicroSystems, LLC

Inventor： Sam Tran ,  Jay M. Towne ,  P. Karl Scheller

IPC: G01R19/165 ,  G01R31/40 ,  G01R31/28 ,  G01R33/02 ,  G01D5/14

Abstract: A monitor circuit for monitoring a level of a first and second regulated source may monitor a voltage level of regulated voltages or a current level of regulated currents. In an embodiment, the monitor circuit includes circuitry responsive to a first regulated current and to a second regulated current. A first circuit responsive to the first regulated current and to the second regulated current generates a first error signal indicative of at least one of an overcurrent condition of the first regulated current and an undercurrent condition of the second regulated current. A second circuit responsive to the first regulated current and to the second regulated current generates a second error signal indicative of at least one of an undercurrent condition of the first regulated current and an overcurrent condition of the second regulated current. A method for monitoring the levels of first and second regulated sources is also provided.