公开(公告)号：US11009565B2

公开(公告)日：2021-05-18

申请号：US15132642

申请日：2016-04-19

Applicant: Allegro MicroSystems, LLC

Inventor： Devon Fernandez ,  Haeyoung Choi

IPC: G01R33/00 ,  G01R1/44 ,  G01R33/02 ,  G01D3/036 ,  G01D5/244

Abstract: A magnetic field sensor includes a comparator detector for which a measured threshold value is stored prior to power down and recalled upon power up for use by the comparator detector. A corresponding method is associated with the magnetic field sensor.

公开(公告)号：US10921341B2

公开(公告)日：2021-02-16

申请号：US16407318

申请日：2019-05-09

Applicant: Allegro MicroSystems, LLC

Inventor： Devon Fernandez

IPC: G01P3/44

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 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 delay processor is responsive to the speed signal and configured to determine a delay for the detector output signal based on the speed of motion of the object.

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：US20190155322A1

公开(公告)日：2019-05-23

申请号：US16259087

申请日：2019-01-28

Applicant: Allegro MicroSystems, LLC

Inventor： Richard B. Cooper ,  Maxim Klebanov ,  Washington Lamar ,  Devon Fernandez

IPC: G05F3/02 ,  H03K19/003 ,  H01L43/02

Abstract: An electronic circuit includes a driver circuit having an output terminal that can be coupled to a load to drive the load. A control circuit is coupled to the driver circuit for controlling the driver circuit. A transistor is coupled in series between the driver circuit and the output terminal. The transistor has a first terminal coupled to the driver circuit and a second terminal coupled to the output terminal. A biasing circuit is coupled to a gate terminal of the transistor and configured to provide a constant voltage to the gate terminal to bias the transistor to a conducting state to reduce the susceptibility of the electronic circuit to electromagnetic interference. The biasing circuit includes a voltage regulator, a Zener diode, and a capacitor. The Zener diode and capacitor are coupled to the gate terminal and a reference terminal.

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：US09618400B2

公开(公告)日：2017-04-11

申请号：US14620533

申请日：2015-02-12

Applicant: Allegro Microsystems, LLC

Inventor： Benjamin Geiger ,  Devon Fernandez

IPC: G01R33/02 ,  G01R21/14 ,  G01B7/30 ,  G01K13/00 ,  G01R33/00 ,  G01K3/00 ,  G01K7/01

CPC classification number: G01K13/00 ,  G01K3/005 ,  G01K7/01 ,  G01R33/007

Abstract: In one aspect, a temperature detection circuit includes a first circuit configured to provide a first signal and a comparator circuit configured to provide a warning signal in response to the first signal if a temperature reaches a temperature value. The first signal enables determination of a parameter of a magnetic sensor.

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：US09395391B2

公开(公告)日：2016-07-19

申请号：US13833847

申请日：2013-03-15

Applicant: Allegro Microsystems, LLC

Inventor： Devon Fernandez ,  Haeyoung Choi

IPC: G01N27/72 ,  G01R33/00 ,  G01R33/02 ,  G01R1/44 ,  G01D3/036 ,  G01D5/244

CPC classification number: G01R33/0082 ,  G01D3/0365 ,  G01D5/2448 ,  G01D5/2449 ,  G01R1/44 ,  G01R33/02

Abstract: A magnetic field sensor includes a comparator detector for which a measured threshold value is stored prior to power down and recalled upon power up for use by the comparator detector. A corresponding method is associated with the magnetic field sensor.

Abstract translation: 磁场传感器包括比较器检测器，在断电之前存储测量的阈值，并且在上电时被比较器检测器使用。 相应的方法与磁场传感器相关联。

公开(公告)号：US09175981B2

公开(公告)日：2015-11-03

申请号：US13859245

申请日：2013-04-09

Applicant: Allegro Microsystems, LLC

Inventor： Andrea Foletto ,  Devon Fernandez ,  Eric Burdette

IPC: G01B7/30 ,  G01D5/12 ,  G01D5/14 ,  G01D5/244 ,  G01P3/487 ,  G01P3/488 ,  G01P3/489 ,  G01R25/00 ,  G01P21/02

CPC classification number: G01D5/12 ,  G01D5/145 ,  G01D5/2448 ,  G01P3/487 ,  G01P3/488 ,  G01P3/489 ,  G01P21/02 ,  G01R25/005

Abstract: A motion sensor has a state processor to identify states associated with a magnetic field signal provided by a magnetic field sensing element. The state processor includes a state peak logic module configured to generate a signal having signal states that have a reduced amount of state chatter.

Abstract translation: 运动传感器具有状态处理器，用于识别与由磁场感测元件提供的磁场信号相关联的状态。 状态处理器包括状态峰值逻辑模块，其被配置为产生具有减少的状态抖动量的信号状态的信号。

公开(公告)号：US20130226490A1

公开(公告)日：2013-08-29

申请号：US13859245

申请日：2013-04-09

Applicant: Allegro Microsystems, LLC

Inventor： Andrea Foletto ,  Devon Fernandez ,  Eric Burdette

IPC: G01R25/00

CPC classification number: G01D5/12 ,  G01D5/145 ,  G01D5/2448 ,  G01P3/487 ,  G01P3/488 ,  G01P3/489 ,  G01P21/02 ,  G01R25/005

Abstract: A motion sensor has a state processor to identify states associated with a magnetic field signal provided by a magnetic field sensing element. The state processor includes a state peak logic module configured to generate states that have a reduced amount of state chatter.

Abstract translation: 运动传感器具有状态处理器，以识别与由磁场感测元件提供的磁场信号相关联的状态。 状态处理器包括状态峰值逻辑模块，其被配置为产生具有减少的状态抖动量的状态。