公开(公告)号：US10670669B2

公开(公告)日：2020-06-02

申请号：US16157313

申请日：2018-10-11

Applicant: Allegro MicroSystems, LLC

Inventor： Rémy Lassalle-Balier ,  Bryan Cadugan

IPC: G01R33/00 ,  G01R33/09 ,  G01D5/16

Abstract: A magnetic field sensor can include a substrate disposed in an x-y plane with x and y axes; one or more magnetoresistance elements, wherein magnetic directions of reference layers of each of the one or more magnetoresistance elements are parallel to the x axis; wherein the one or more magnetoresistance elements are operable to generate a magnetoresistance element signal; a first current conductor operable to generate a first AC magnetic field in an x-direction and a second current conductor operable to generate a second AC magnetic field in a y-direction; and a component determination circuit comprising at least two of: a first demodulator to demodulate the magnetoresistance element signal with a first clock signal with a first frequency, a second demodulator coupled to demodulate the magnetoresistance element signal with the first clock signal or with a second clock signal with a second frequency, or a low pass filter operable to filter the magnetoresistance element signal.

公开(公告)号：US20190285667A1

公开(公告)日：2019-09-19

申请号：US16421982

申请日：2019-05-24

Applicant: Allegro MicroSystems, LLC

Inventor： Shaun D. Milano ,  Bryan Cadugan ,  Michael C. Doogue ,  Alexander Latham ,  William P. Taylor ,  Harianto Wong ,  Sundar Chetlur

IPC: G01R15/14 ,  G01R15/20 ,  G01R19/00

Abstract: Systems and methods described herein are directed towards integrating a shield layer into a current sensor to shield a magnetic field sensing element and associated circuitry in the current sensor from electrical, voltage, or electrical transient noise. In an embodiment, a shield layer may be disposed along at least one surface of a die supporting a magnetic field sensing element. The shield layer may be disposed in various arrangements to shunt noise caused by a parasitic coupling between the magnetic field sensing element and the current carrying conductor away from the magnetic field sensing element.

公开(公告)号：US10347277B2

公开(公告)日：2019-07-09

申请号：US15886032

申请日：2018-02-01

Applicant: Allegro MicroSystems, LLC

Inventor： Paolo Campiglio ,  Bryan Cadugan ,  Claude Fermon ,  Rémy Lassalle-Balier

IPC: G11B5/39 ,  G01R33/09 ,  H01F10/32 ,  H01L43/08 ,  G01R33/00 ,  H01L43/02 ,  H01L43/10 ,  H01L43/12 ,  H01F41/30

Abstract: A magnetoresistance element has a pinning arrangement with two antiferromagnetic pinning layers, two pinned layers, and a free layer. A spacer layer between one of the two antiferromagnetic pinning layers and the free layer has a material selected to allow a controllable partial pinning by the one of the two antiferromagnetic pinning layers.

公开(公告)号：US20160139199A1

公开(公告)日：2016-05-19

申请号：US14541582

申请日：2014-11-14

Applicant: Allegro MicroSystems, LLC

Inventor： Craig S. Petrie ,  Bryan Cadugan

IPC: G01R31/28 ,  G01R33/09 ,  G01R33/07

CPC classification number: G01R31/2884 ,  G01D5/145 ,  G01D5/2448 ,  G01D5/2449 ,  G01R33/0035 ,  G01R33/07 ,  G01R33/09

Abstract: Methods and apparatus for processing a signal comprise at least one circuit configured to generate a measured signal during a measured time period and a reference signal during a reference time period. Also included is at least one dual- or multi-path analog-to-digital converter comprising at least a first processing circuit configured to process the measured signal, at least a second processing circuit configured to process the reference signal, and a third processing circuit configured to process both the measured signal and the reference signal.

Abstract translation: 用于处理信号的方法和装置包括被配置为在测量的时间段期间产生测量信号的至少一个电路和参考时间段期间的参考信号。 还包括至少一个双路或多路模数转换器，至少包括配置成处理测量信号的第一处理电路，至少配置成处理参考信号的第二处理电路和第三处理电路 被配置为处理所测量的信号和参考信号。

公开(公告)号：US09172565B2

公开(公告)日：2015-10-27

申请号：US14182595

申请日：2014-02-18

Applicant: Allegro Microsystems, LLC

Inventor： Bryan Cadugan ,  Michael C. Doogue ,  Mark J. Donovan

IPC: H04B14/04 ,  H04L25/03 ,  H04L7/04

CPC classification number: H04L25/03834 ,  H04L7/042 ,  H04L67/12

Abstract: In one aspect, a system includes a master component having a communication node; and a plurality of slave components. Each slave component has a bidirectional node. The slave components are configured to each store data in response to a trigger signal received at the bidirectional node from the communication node.

Abstract translation: 一方面，系统包括具有通信节点的主组件; 和多个从属组件。 每个从属组件都有一个双向节点。 从属组件被配置为响应于在通信节点处在双向节点处接收的触发信号来存储数据。

公开(公告)号：US09042716B2

公开(公告)日：2015-05-26

申请号：US13967681

申请日：2013-08-15

Applicant: Allegro Microsystems, LLC

Inventor： Bryan Cadugan ,  Alexander Latham

IPC: G03B3/10 ,  G01B7/00 ,  G01B7/14 ,  G03B13/36 ,  G01D5/14 ,  G02B7/08 ,  G01R33/00 ,  G01R33/06

CPC classification number: G01B7/003 ,  G01B7/14 ,  G01D5/145 ,  G01R33/0023 ,  G01R33/06 ,  G02B7/08 ,  G03B13/36

Abstract: The linear position of an object is estimated using multiple magnetic field sensors and a magnet. The multiple magnetic field sensors are held in fixed relation to one another and in moving relation with respect to the magnet. Readings of the first and second magnetic field sensors and the fixed distance between the first and second magnetic field sensors may be used to estimate the linear position. In some embodiments, an estimated frequency of an approximately sinusoidal field versus position characteristic is also used as part of the estimation.

Abstract translation: 使用多个磁场传感器和磁体来估计物体的线性位置。 多个磁场传感器彼此固定并且相对于磁体移动。 可以使用第一和第二磁场传感器的读数和第一和第二磁场传感器之间的固定距离来估计线性位置。 在一些实施例中，近似正弦场对位置特性的估计频率也被用作估计的一部分。

公开(公告)号：US20150050013A1

公开(公告)日：2015-02-19

申请号：US13967681

申请日：2013-08-15

Applicant: Allegro Microsystems, LLC

Inventor： Bryan Cadugan ,  Alexander Latham

IPC: G01B7/00 ,  G03B13/36 ,  G01B7/14

CPC classification number: G01B7/003 ,  G01B7/14 ,  G01D5/145 ,  G01R33/0023 ,  G01R33/06 ,  G02B7/08 ,  G03B13/36

Abstract: The linear position of an object is estimated using multiple magnetic field sensors and a magnet. The multiple magnetic field sensors are held in fixed relation to one another and in moving relation with respect to the magnet. Readings of the first and second magnetic field sensors and the fixed distance between the first and second magnetic field sensors may be used to estimate the linear position. In some embodiments, an estimated frequency of an approximately sinusoidal field versus position characteristic is also used as part of the estimation.

Abstract translation: 使用多个磁场传感器和磁体来估计物体的线性位置。 多个磁场传感器彼此固定并且相对于磁体移动。 可以使用第一和第二磁场传感器的读数和第一和第二磁场传感器之间的固定距离来估计线性位置。 在一些实施例中，近似正弦场对位置特性的估计频率也被用作估计的一部分。

公开(公告)号：US11770632B2

公开(公告)日：2023-09-26

申请号：US17230253

申请日：2021-04-14

Applicant: Allegro MicroSystems, LLC

Inventor： Joseph James Judkins, III ,  Bryan Cadugan

IPC: H04N25/709 ,  G01K7/01 ,  H04N17/00

CPC classification number: H04N25/709 ,  G01K7/01 ,  H04N17/002

Abstract: Methods and apparatus for determining the temperature of a pixel array. In embodiments, a first pixel in a pixel array is reverse-biased and a second pixel in the pixel array is forward-biased. A voltage for the second pixel can be measured to determine a temperature of the pixel array from the measured voltage for the second pixel.

公开(公告)号：US11262385B2

公开(公告)日：2022-03-01

申请号：US16421982

申请日：2019-05-24

Applicant: Allegro MicroSystems, LLC

Inventor： Shaun D. Milano ,  Bryan Cadugan ,  Michael C. Doogue ,  Alexander Latham ,  William P. Taylor ,  Harianto Wong ,  Sundar Chetlur

IPC: G01R15/14 ,  G01R15/20 ,  G01R19/00

Abstract: Systems and methods described herein are directed towards integrating a shield layer into a current sensor to shield a magnetic field sensing element and associated circuitry in the current sensor from electrical, voltage, or electrical transient noise. In an embodiment, a shield layer may be disposed along at least one surface of a die supporting a magnetic field sensing element. The shield layer may be disposed in various arrangements to shunt noise caused by a parasitic coupling between the magnetic field sensing element and the current carrying conductor away from the magnetic field sensing element.

公开(公告)号：US11193989B2

公开(公告)日：2021-12-07

申请号：US16047342

申请日：2018-07-27

Applicant: Allegro MicroSystems, LLC ,  Commissariat à l'énergie atomique et aux énergies alternatives

Inventor： Paolo Campiglio ,  Bryan Cadugan ,  Amal Hamdache ,  Florian Pallier ,  Claude Fermon

IPC: G01R33/09 ,  G01R33/00

Abstract: A magnetoresistance assembly can include a substrate and a first GMR element disposed over the substrate, the first GMR element having a bottom surface and top surface. The magnetoresistance assembly can further include a first TMR element disposed over the substrate, the first TMR element having a top surface and a bottom surface, wherein a line perpendicular to and intersecting the top or bottom surface of the first TMR element intersects the first GMR element. The first GMR element and the first TMR element are in electrical communication.