公开(公告)号：US20180088184A1

公开(公告)日：2018-03-29

申请号：US15816045

申请日：2017-11-17

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 ,  G01R23/00 ,  G01P21/02 ,  G01P3/488 ,  G01P3/44 ,  G01R33/06 ,  G01P13/00 ,  G01P3/487

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：US20150260803A1

公开(公告)日：2015-09-17

申请号：US14626963

申请日：2015-02-20

Applicant: Allegro Microsystems, LLC

Inventor： Michael Chen ,  Eric Burdette ,  Devon Fernandez ,  Steven E. Snyder ,  Jacob Harer

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

CPC classification number: G01R33/0029 ,  G01D5/147 ,  G01D5/2448 ,  G01R33/07 ,  G01R33/09

Abstract: A magnetic field sensor uses upper and lower thresholds. The upper and lower thresholds are limited such that they have a minimum separation distance between equivalent voltage levels of the upper and lower thresholds.

Abstract translation: 磁场传感器使用上限和下限。 限制上限和下限，使得它们具有在上限和下限阈值的等效电压电平之间的最小间隔距离。

公开(公告)号：US11585868B2

公开(公告)日：2023-02-21

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

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：US20190334692A1

公开(公告)日：2019-10-31

申请号：US15966572

申请日：2018-04-30

Applicant: Allegro MicroSystems, LLC

Inventor： Jay M. Towne ,  Steven E. Snyder ,  Steven Ricco ,  Matthew Nealon

IPC: H04L7/00 ,  G01J1/44 ,  G01K15/00 ,  G01R35/00 ,  G01D18/00

Abstract: A method for synchronization of an input signal includes providing the input signal to a first signal path associated with a first clock and to a second signal path associated with a second clock, detecting an edge of the input signal by detecting values of the input signal along the first signal path at a first rising edge of the first clock and at a second rising edge of the first clock, detecting a value of the input signal along the second signal path at an edge of the second clock, and selecting the input signal from the first signal path or from the second signal path according to the detected value of the input signal along the second path when an edge of the input signal along the first path is detected.

公开(公告)号：US20160025820A1

公开(公告)日：2016-01-28

申请号：US14337613

申请日：2014-07-22

Applicant: Allegro MicroSystems, LLC

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

IPC: G01R33/00 ,  G01P3/44 ,  G01P13/00 ,  G01R33/06

CPC classification number: G01R33/0023 ,  G01D5/24476 ,  G01P3/44 ,  G01P3/487 ,  G01P3/488 ,  G01P13/00 ,  G01P21/02 ,  G01R23/005 ,  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.

Abstract translation: 具有自检功能的磁场传感器的系统，方法和装置包括检测目标的速度和方向的检测电路。 可以包括用于测试检测到的速度和方向的精度的一个或多个电路。 还可以包括用于测试振荡器精度的一个或多个电路。 还可以包括用于测试模拟 - 数字转换器的精度的一个或多个电路。 此外，可以包括一个或多个IDDQ和/或内置自检（BIST）电路。

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：US10797851B2

公开(公告)日：2020-10-06

申请号：US15966572

申请日：2018-04-30

Applicant: Allegro MicroSystems, LLC

Inventor： Jay M. Towne ,  Steven E. Snyder ,  Steven Ricco ,  Matthew Nealon

IPC: H04L7/00 ,  G01D18/00 ,  G01J1/44 ,  G01K15/00 ,  G01R35/00

Abstract: A method for synchronization of an input signal includes providing the input signal to a first signal path associated with a first clock and to a second signal path associated with a second clock, detecting an edge of the input signal by detecting values of the input signal along the first signal path at a first rising edge of the first clock and at a second rising edge of the first clock, detecting a value of the input signal along the second signal path at an edge of the second clock, and selecting the input signal from the first signal path or from the second signal path according to the detected value of the input signal along the second path when an edge of the input signal along the first path is detected.

公开(公告)号：US09778326B2

公开(公告)日：2017-10-03

申请号：US14626963

申请日：2015-02-20

Applicant: Allegro Microsystems, LLC

Inventor： Michael Chen ,  Eric Burdette ,  Devon Fernandez ,  Steven E. Snyder ,  Jacob Harer

IPC: G01R33/00 ,  G01R33/07 ,  G01R33/09 ,  G01D5/14 ,  G01D5/244

CPC classification number: G01R33/0029 ,  G01D5/147 ,  G01D5/2448 ,  G01R33/07 ,  G01R33/09

Abstract: A magnetic field sensor uses upper and lower thresholds. The upper and lower thresholds are limited such that they have a minimum separation distance between equivalent voltage levels of the upper and lower thresholds.

公开(公告)号：US20160123780A1

公开(公告)日：2016-05-05

申请号：US14529497

申请日：2014-10-31

Applicant: Allegro Microsystems, LLC

Inventor： Steven E. Snyder ,  Craig McConnell ,  Peter G. Wells

IPC: G01D18/00 ,  G01R33/09 ,  G01D5/14

CPC classification number: G01D18/00 ,  G01D5/14 ,  G01P3/487 ,  G01P3/488 ,  G01P13/045 ,  G01P21/02 ,  G01R33/093 ,  G01R33/096 ,  G01R33/098

Abstract: A magnetic field sensor for detecting motion of an object includes error detection circuiting and processing. Magnetic field sensing elements are configured to generate at least two magnetic field signals in response to a magnetic field associated with the object which signals are used by detectors to generate right and left channel signals with edges indicative of motion of the object. A direction calculation processor responsive to right and left channel signals generates a direction signal having a state indicative of a direction of motion of the object and an output signal generator generates an output signal having a pulse indicative of the direction of motion of the object in response to the direction signal. An error detection processor responsive to the output signal and to the direction signal is configured to detect an error in at least one of the direction signal and the output signal.

Abstract translation: 用于检测物体运动的磁场传感器包括误差检测电路和处理。 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至少两个磁场信号，该信号被检测器用于产生具有指示物体运动的边缘的左和右声道信号。 响应于右和左声道信号的方向计算处理器产生具有指示对象的运动方向的状态的方向信号，并且输出信号发生器产生具有指示对象的运动方向的脉冲的响应的输出信号 到方向信号。 响应于输出信号和方向信号的错误检测处理器被配置为检测方向信号和输出信号中的至少一个中的错误。

公开(公告)号：US11454521B2

公开(公告)日：2022-09-27

申请号：US17060235

申请日：2020-10-01

Applicant: Allegro MicroSystems, LLC

Inventor： Philip Suyderhoud ,  Logan G. Stewart ,  Steven E. Snyder

IPC: G01D5/14 ,  G01P13/00

Abstract: A magnetic field sensor for detecting motion of an object includes one or more magnetic field sensing elements configured to generate a magnetic field signal in response to a magnetic field associated with the motion of the object and a detector responsive to the magnetic field signal and to a threshold signal and configured to generate a comparison signal having edges occurring in response to a comparison of the magnetic field signal to the threshold signal. A threshold generator is configured to generate the threshold signal at a first level when a peak-to-peak value of the magnetic field signal is greater than a first predetermined value and at a second level when the peak-to-peak value of the magnetic field signal is less than a second predetermined value different than the first predetermined value.