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公开(公告)号：US20160282425A1
公开(公告)日：2016-09-29
申请号：US14670453
申请日：2015-03-27
Applicant: Allegro Microsystems, LLC
Inventor： David J. Haas , Michael Gaboury , Alexander Latham
CPC classification number: G01R33/072 , G01R15/202 , G01R19/0092 , G01R33/0017 , G01R33/0035 , G01R33/07 , G01R33/075
Abstract: In one aspect, a magnetic field sensor includes a chopper stabilized amplifier and a plurality of Hall-type elements in parallel and connected to the chopper stabilized amplifier. In another aspect, a magnetic field sensor includes a chopper stabilized amplifier and a plurality of Hall quad elements in parallel and connected to the chopper stabilized amplifier. In a further aspect, a current sensor has a bandwidth of 1 MHz and includes a chopper stabilized amplifier and a plurality of Hall quad elements, fabricated in silicon, in parallel and connected to the chopper stabilized amplifier.
Abstract translation: 一方面，磁场传感器包括并联的斩波稳定放大器和多个霍尔型元件，并连接到斩波稳定放大器。 另一方面，磁场传感器包括斩波稳定放大器和并联的多个霍尔四边形元件，并连接到斩波稳定放大器。 在另一方面，电流传感器具有1MHz的带宽，并且包括并联并连接到斩波稳定放大器的斩波稳定放大器和制造在硅中的多个霍尔四边形元件。
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82.发明授权Magnetic field sensor configured to measure a magnetic field in a closed loop manner 有权磁场传感器被配置为以闭环方式测量磁场公开(公告)号：US09354284B2
公开(公告)日：2016-05-31
申请号：US14271620
申请日：2014-05-07
Applicant: Allegro Microsystems, LLC
Inventor： Alexander Latham
CPC classification number: G01R33/09 , G01R15/205 , G01R33/0041 , G01R33/07 , G01R33/093 , G01R33/096 , G01R33/098
Abstract: A magnetic field sensor for sensing an external magnetic field includes at least one magnetic field sensing element for measuring a magnetic field produced by a first magnetic field generating source and a current generator configured to receive one or more drive current signals at an input thereof and to generate a drive current signal having a periodic waveform and an amplitude offset at an output thereof. Also included is a second magnetic field generating source configured to receive the drive current signal at an input thereof and in response thereto, provide a magnetic field to the at least one magnetic field sensing element. Additionally included is a comparator configured to receive a reference voltage as a first input and an output signal from the at least one magnetic field sensing element as a second input, and in response thereto to generate a comparator output signal having a duty cycle. Further included is a compensation circuit configured to receive the comparator output signal having a duty cycle at an input thereof and to generate an offset signal for correcting the duty cycle to a predetermined duty cycle as an output. A corresponding method is also provided.
Abstract translation: 用于感测外部磁场的磁场传感器包括用于测量由第一磁场产生源产生的磁场的至少一个磁场感测元件和被配置为在其输入处接收一个或多个驱动电流信号的电流发生器，以及 在其输出端产生具有周期性波形和振幅偏移的驱动电流信号。 还包括第二磁场发生源，其被配置为在其输入处接收驱动电流信号，并响应于此，向至少一个磁场感测元件提供磁场。 另外包括比较器，其被配置为接收作为第一输入的参考电压和来自至少一个磁场感测元件的输出信号作为第二输入，并响应于此产生具有占空比的比较器输出信号。 还包括补偿电路，其配置为接收在其输入处具有占空比的比较器输出信号，并产生用于将占空比校正到预定占空比的偏移信号作为输出。 还提供了相应的方法。
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公开(公告)号：US20140355973A1
公开(公告)日：2014-12-04
申请号：US13904356
申请日：2013-05-29
Applicant: Allegro Microsystems, LLC
Inventor： Bryan Cadugan , Alexander Latham
IPC: G03B13/34
CPC classification number: G03B13/34 , G03B3/10 , H02P7/00 , H02P23/0004 , H02P25/028 , H02P25/034 , H02P31/00
Abstract: A system for controlling a motor may include a motor driver circuit for driving a camera motor. A memory capable of storing a plurality of parameters for controlling the camera motor may also be included. A set of parameters from the memory may be chosen to be applied to driving the motor. A motor control module may receive a signal from the control logic module, apply the chosen set of parameters to driving the camera motor, and command the motor driver circuit to drive the motor in accordance with the applied set of parameters. The parameters may be chosen based on desired behavior of the system and various other stimuli.
Abstract translation: 用于控制电动机的系统可以包括用于驱动照相机电动机的电动机驱动器电路。 还可以包括能够存储用于控制照相机电动机的多个参数的存储器。 可以选择来自存储器的一组参数来应用于驱动电动机。 电机控制模块可以从控制逻辑模块接收信号，应用所选择的一组参数来驱动摄像机电机，并且根据所应用的一组参数命令电动机驱动电路来驱动电动机。 可以基于系统的期望行为和各种其它刺激来选择参数。
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公开(公告)号：US20250164529A1
公开(公告)日：2025-05-22
申请号：US18512122
申请日：2023-11-17
Applicant: Allegro MicroSystems, LLC
Inventor： Maxwell McNally , Alexander Latham , Shixi Louis Liu , William P. Taylor
Abstract: Methods and apparatus for a current sensor integrated circuit package that includes a die having a first magnetic field sensing element and a leadframe to support the die. The leadframe has a U-shaped current conductor loop with a throat region and a first notch in the throat region of the current conductor loop. A first magnetic field sensing element is positioned in relation to the first notch. In some embodiments, the first magnetic field sensing element is aligned with an edge of the first notch.
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公开(公告)号：US12210040B2
公开(公告)日：2025-01-28
申请号：US17648310
申请日：2022-01-19
Applicant: Allegro MicroSystems, LLC
Inventor： Shaun D. Milano , Bryan Cadugan , Michael C. Doogue , Alexander Latham , William P. Taylor , Harianto Wong , Sundar Chetlur
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.
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Patent Agency Ranking
公开(公告)号：US20250029780A1
公开(公告)日：2025-01-23
申请号：US18354903
申请日：2023-07-19
Applicant: Allegro MicroSystems, LLC
Inventor： Rémy Lassalle-Balier , Alexander Latham , Benjamin Geiger , Mathew Drouin
Abstract: An apparatus, comprising: a first transmitting coil including at least one first portion and at least one second portion, the first and second portions having different polarities; and a second transmitting coil that is disposed above or below the first transmitting coil, the second transmitting coil including at least one third portion and at least one fourth portion, the third and fourth portions having different polarities, wherein the first and second transmitting coils are configured so that, when the first transmitting coil is not driven and the second transmitting coil is driven, a net magnetic flux through at least one of the first portions is approximately zero, the net magnetic flux being a magnetic flux that is entirely attributable to the second transmitting coil.
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87.发明申请公开(公告)号：US20250027935A1
公开(公告)日：2025-01-23
申请号：US18355536
申请日：2023-07-20
Applicant: Allegro MicroSystems, LLC
Inventor： Rémy Lassalle-Balier , Alexander Latham , Paolo Campiglio
IPC: G01N33/543 , B01L3/00 , G01N27/74 , G01R33/12
Abstract: In one aspect, a magnetic-field biosensor includes an insulator and a plurality of magnetic-field sensing elements that includes a first and a second magnetic-field sensing elements. The insulator has a first and a second plurality of portions, and the second plurality of portions is thicker than the first plurality of portions. The magnetic-field biosensor further includes a first receptor configured to attach to biological material and being on a first portion of the first plurality of portions and directly above the first magnetic-field sensing element; and a second receptor configured to attach to the biological material and being on a first portion of the second plurality of portions and directly above the second magnetic-field sensing element. Outputs of the first and the second magnetic-field sensing elements are used to sense a magnetic field from a first magnetic nanoparticle by reducing an effect of an applied magnetic field.
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公开(公告)号：US20250027791A1
公开(公告)日：2025-01-23
申请号：US18393954
申请日：2023-12-22
Applicant: Allegro MicroSystems, LLC
Inventor： Solène Bastien , Alexander Latham , Emanuele Andrea Casu , Rémy Lassalle-Balier , David Witts , Paul Smith
Abstract: A system, comprising: a processing circuitry that is configured to: receive a signal S1 and a signal S2, the signal S1 being generated by a first receiving coil in response to a first magnetic field, the signal S2 being generated by a second receiving coil in response to the first magnetic field, receive a signal S3 and a signal S4, the signal S3 being generated by a third receiving coil in response to a second magnetic field, the signal S4 being generated by a fourth receiving coil in response to the second magnetic field; calculate a first electrical angle based on signals S1 and S2; calculate a second electrical angle based on signals S3 and S4; and generate an output signal based on the first and second electrical angles.
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公开(公告)号：US20250012876A1
公开(公告)日：2025-01-09
申请号：US18893088
申请日：2024-09-23
Applicant: Allegro MicroSystems, LLC
Inventor： Rémy Lassalle-Balier , Alexander Latham
Abstract: A magnetic field current sensor comprising: a conductor; magnetic field sensing elements including a first magnetic field sensing element generating a first signal, a second magnetic field sensing element generating a second signal, a third magnetic field sensing element generating a third signal, and a fourth magnetic field sensing element generating a fourth signal; circuitry that generates a difference signal indicative of twice the second signal less the first signal and less the fourth signal, wherein the second magnetic field sensing element is interleaved with the third magnetic field sensing element, wherein the second signal and the third signal are substantially equal, and wherein a distance between the first magnetic field sensing element and the second magnetic field sensing element is equal to a distance between the second magnetic field sensing element and the fourth magnetic field sensing element.
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公开(公告)号：US20230417579A1
公开(公告)日：2023-12-28
申请号：US17809382
申请日：2022-06-28
Applicant: Allegro MicroSystems, LLC
Inventor： Alexander Latham , Rémy Lassalle-Balier
IPC: G01D5/20
CPC classification number: G01D5/2086 , G01D2205/40
Abstract: A system, comprising a target, a first receiving coil array, and a second receiving coil array. The target includes: (i) a first array of conductive features that are arranged in a line or arc and separated from one another by voids, and (ii) a second array of conductive features that are arranged in a line or arc and separated from one another by voids, the conductive features in the first array being staggered with respect to the conductive features in the second array.; The first receiving coil array is configured to sense a first magnetic field that is associated with the first array of conductive features. The second receiving coil array is configured to sense a second magnetic field that is associated with the second array of conductive features.
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