公开(公告)号：US10551439B2

公开(公告)日：2020-02-04

申请号：US15657324

申请日：2017-07-24

Applicant: Allegro MicroSystems, LLC

Inventor： Mathew Drouin ,  Jonathan Zimmermann

IPC: G01R31/319 ,  G01R31/28 ,  G01R31/30 ,  G01R35/00

Abstract: An integrated circuit including a first multiplexor configured to receive one of a plurality of diagnostic signals from circuitry under test (DUT), the first multiplexor responsive to diagnostic signals provided thereto and configured to selectively output one of the diagnostic signals in response to a control signal, a second multiplexor configured to receive one of a plurality of reference signals from one of a plurality of nodes on a reference circuit, the second multiplexor configured to selectively output one of the diagnostic signals in response to a control signal, and a comparator configured to compare the diagnostic signal elicited from the first multiplexor with the reference signal elicited from the second multiplexor, the comparator further configured to output the result of the comparison between the diagnostic signal and the reference signal.

公开(公告)号：US09720054B2

公开(公告)日：2017-08-01

申请号：US14529594

申请日：2014-10-31

Applicant: Allegro MicroSystems, LLC

Inventor： Mathew Drouin ,  Devon Fernandez ,  Jay M. Towne ,  Alejandro G. Milesi

IPC: G01R33/09 ,  G01R33/028 ,  G01R33/00

CPC classification number: G01R33/028 ,  G01R33/0023 ,  G01R33/09

Abstract: Electronic circuits used in magnetic field sensors use transistors for passing a current through the transistors and also through a magnetoresistance element.

公开(公告)号：US09442170B2

公开(公告)日：2016-09-13

申请号：US15138559

申请日：2016-04-26

Applicant: Allegro Microsystems, LLC

Inventor： Mathew Drouin ,  Devon Fernandez ,  William P. Taylor

IPC: G01K7/00 ,  G01K15/00 ,  G01R33/00 ,  G01R33/07 ,  G01R33/09

CPC classification number: G01R33/0082 ,  G01D3/0365 ,  G01K7/00 ,  G01K7/01 ,  G01R33/0017 ,  G01R33/0029 ,  G01R33/0041 ,  G01R33/07 ,  G01R33/09 ,  G01R35/005

Abstract: In an embodiment, a circuit is configured to produce a magnetic field signal having a frequency spectrum. The circuit may also produce a temperature signal. A modulation circuit may modulate the temperature signal with a frequency outside the frequency spectrum of the magnetic field signal. The modulated signal and the magnetic field signal may be combined to produce a combined signal. A separation circuit may be configured to separate component signals from the combined signal. The separation circuit may include a first filter, which, when applied to the combined signal, produces a filtered signal; a modulation circuit configured to shift the data representing the temperature signal to a baseband frequency; and a second filter configured to separate the data representing the temperature signal from the combined signal.

公开(公告)号：US20160208763A1

公开(公告)日：2016-07-21

申请号：US14600826

申请日：2015-01-20

Applicant: ALLEGRO MICROSYSTEMS, LLC

Inventor： Devon Fernandez ,  Mathew Drouin

IPC: F02P5/04 ,  G01R33/09 ,  G01R33/07 ,  G01P13/00 ,  G01P3/44

CPC classification number: G01R33/09 ,  F02P7/067 ,  G01P3/487 ,  G01P13/00 ,  G01P13/045 ,  G01R33/0029 ,  G01R33/07

Abstract: A magnetic field sensor for detecting motion of an object includes threshold generation circuitry and processing. Magnetic field sensing elements are configured to generate a magnetic field signal in response to a magnetic field associated with the object. A motion detector responsive to the magnetic field signal and to a threshold signal is configured to generate a detector output signal having edges occurring in response to a comparison of the magnetic field signal and the threshold signal. A speed detector responsive to the detector output signal generates a speed signal indicative of a speed of motion of the object. A threshold generator responsive to the speed signal generates the threshold signal having a level that varies in response to the speed signal.

Abstract translation: 用于检测物体运动的磁场传感器包括阈值产生电路和处理。 磁场感测元件被配置为响应于与物体相关联的磁场而产生磁场信号。 响应于磁场信号和阈值信号的运动检测器被配置为产生具有响应于磁场信号和阈值信号的比较而发生边缘的检测器输出信号。 响应于检测器输出信号的速度检测器产生指示物体的运动速度的速度信号。 响应于速度信号的阈值生成器产生具有响应于速度信号而变化的电平的阈值信号。