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公开(公告)号：US20150185293A1
公开(公告)日：2015-07-02
申请号：US14578800
申请日：2014-12-22
Applicant: ALLEGRO MICROSYSTEMS, LLC
Inventor： Shaun D. Milano , Georges El Bacha , Michael C. Doogue , David J. Haas , Gregory Delmain , Michael Gaboury , William P. Taylor
Abstract: Methods and apparatus for providing an integrated circuit having a drive current source, a magnetic sensing element coupled to the drive current source, the magnetic sensing element having first and second differential outputs, and first and second current elements to provide respective currents in relation to the drive current source, wherein the first current element is coupled to the first differential output and the second current element is coupled to the second differential output. In illustrative embodiments, an IC output can output a voltage corresponding to the currents of the first and second current elements.
Abstract translation: 用于提供具有驱动电流源，耦合到驱动电流源的磁感测元件，具有第一和第二差分输出的磁感测元件以及第一和第二电流元件的集成电路的方法和装置，以提供相对于 驱动电流源，其中所述第一电流元件耦合到所述第一差分输出，并且所述第二电流元件耦合到所述第二差分输出。 在说明性实施例中，IC输出可以输出对应于第一和第二电流元件的电流的电压。
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22.发明申请Methods and Apparatus for Sensor Diagnostics Including Sensing Element Operation 审中-公开包括传感元件操作的传感器诊断方法和设备公开(公告)号：US20150185284A1
公开(公告)日：2015-07-02
申请号：US14578789
申请日：2014-12-22
Applicant: ALLEGRO MICROSYSTEMS, LLC
Inventor： Shaun D. Milano , Georges El Bacha , Michael C. Doogue , William P. Taylor
IPC: G01R31/3187 , G01R33/02 , G01R33/00 , G01R33/07 , G01R33/09
CPC classification number: G01R31/2884 , G01R31/2829 , G01R31/3187 , G01R33/00 , G01R33/0023 , G01R33/02 , G01R33/07 , G01R33/09 , G01R33/091 , G01R35/00 , H01L2224/48091 , H01L2224/48247 , H01L2224/48257 , H01L2924/181 , H01L2924/00014 , H01L2924/00012
Abstract: Methods and apparatus to provide an integrated circuit having a magnetic sensing element having differential first and second outputs and an input, the input to receive current and first and second switches coupled to a respective one of the differential first and second outputs. A first voltage source is coupled between the first and second switches, the first and second switches having a first state in which the first voltage source is coupled across the differential first and second outputs, and an IC output can output a voltage corresponding to the first voltage source when the first and second switches are in the first state for monitoring operation of a signal path from the magnetic sensing element to the IC output.
Abstract translation: 提供具有具有差分第一和第二输出的磁感测元件和输入的集成电路的方法和装置，所述输入接收电流以及耦合到所述差分第一和第二输出中的相应一个的第一和第二开关。 第一电压源耦合在第一和第二开关之间，第一和第二开关具有第一状态，其中第一电压源跨差分第一和第二输出耦合，并且IC输出可输出对应于第一电压的第一电压 当第一和第二开关处于用于监视从磁感应元件到IC输出的信号路径的操作的第一状态时的电压源。
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23.发明申请公开(公告)号：US20140312883A1
公开(公告)日：2014-10-23
申请号：US14321347
申请日：2014-07-01
Applicant: Allegro MicroSystems, LLC
Inventor： Andreas P. Friedrich , Andrea Foletto , Michael C. Doogue , William P. Taylor , Ravi Vig , P. Karl Scheller
CPC classification number: G01R33/0035 , G01R33/0023 , G01R35/005
Abstract: A magnetic field sensor includes built in self-test circuits that allow a self-test of most of, or all of, the circuitry of the magnetic field sensor, including self-test of a magnetic field sensing element used within the magnetic field sensor, while the magnetic field sensor is functioning in normal operation.
Abstract translation: 磁场传感器包括内置的自检电路，其允许对磁场传感器的电路的大部分或全部进行自检，包括在磁场传感器内使用的磁场感测元件的自检， 同时磁场传感器正常工作。
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24.发明授权公开(公告)号：US08818749B2
公开(公告)日：2014-08-26
申请号：US13743451
申请日：2013-01-17
Applicant: Allegro Microsystems, LLC
Inventor： Andreas P. Friedrich , Andrea Foletto , Michael C. Doogue , William P. Taylor , Ravi Vig , P. Karl Scheller
CPC classification number: G01R33/0035 , G01R33/0023 , G01R35/005
Abstract: A magnetic field sensor includes built in self-test circuits that allow a self-test of most of, or all of, the circuitry of the magnetic field sensor, including self-test of a magnetic field sensing element used within the magnetic field sensor, while the magnetic field sensor is functioning in normal operation.
Abstract translation: 磁场传感器包括内置的自检电路，其允许对磁场传感器的电路的大部分或全部进行自检，包括在磁场传感器内使用的磁场感测元件的自检， 同时磁场传感器正常工作。
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25.发明授权Circuits and methods for generating a diagnostic mode of operation in a magnetic field sensor 有权用于在磁场传感器中产生诊断操作模式的电路和方法公开(公告)号：US08692546B2
公开(公告)日：2014-04-08
申请号：US13969702
申请日：2013-08-19
Applicant: Allegro Microsystems, LLC
Inventor： Juan Manuel Cesaretti , Gerardo A. Monreal , William P. Taylor , Michael C. Doogue
IPC: G01R33/06
CPC classification number: G01R35/005 , G01R33/0035
Abstract: A magnetic field sensor includes a diagnostic circuit that allows a self-test of most of, or all of, the circuitry of the magnetic field sensor, including a self-test of a magnetic field sensing element used within the magnetic field sensor. The magnetic field sensor can generate a diagnostic magnetic field to which the magnetic field sensor is responsive.
Abstract translation: 磁场传感器包括诊断电路，其允许对磁场传感器的电路的大部分或全部进行自检，包括在磁场传感器内使用的磁场感测元件的自检。 磁场传感器可以产生磁场传感器响应的诊断磁场。
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Patent Agency Ranking
公开(公告)号：US11885645B2
公开(公告)日：2024-01-30
申请号：US17350045
申请日：2021-06-17
Applicant: Allegro MicroSystems, LLC
Inventor： Alexander Latham , Evan Shorman , Michael C. Doogue
IPC: G01D18/00
CPC classification number: G01D18/00
Abstract: A sensor includes a sensing element configured to generate a sensing element output signal indicative of a sensed parameter and a signal path responsive to the sensing element output signal and having at least one of an adjustable gain or an adjustable offset, wherein the signal path is configured to generate a sensor output signal indicative of the sensed parameter. A supply voltage detector is configured to generate a supply voltage signal indicative of which of a plurality of voltage ranges a supply voltage of the sensor falls within and at least one of the adjustable gain or the adjustable offset is adjustable in response to the supply voltage signal.
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公开(公告)号：US20220404182A1
公开(公告)日：2022-12-22
申请号：US17350045
申请日：2021-06-17
Applicant: Allegro MicroSystems, LLC
Inventor： Alexander Latham , Evan Shorman , Michael C. Doogue
IPC: G01D18/00
Abstract: A sensor includes a sensing element configured to generate a sensing element output signal indicative of a sensed parameter and a signal path responsive to the sensing element output signal and having at least one of an adjustable gain or an adjustable offset, wherein the signal path is configured to generate a sensor output signal indicative of the sensed parameter. A supply voltage detector is configured to generate a supply voltage signal indicative of which of a plurality of voltage ranges a supply voltage of the sensor falls within and at least one of the adjustable gain or the adjustable offset is adjustable in response to the supply voltage signal.
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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
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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公开(公告)号：US11073573B2
公开(公告)日：2021-07-27
申请号：US16851473
申请日：2020-04-17
Applicant: Allegro MicroSystems, LLC
Inventor： Alexander Latham , Michael C. Doogue , Jason Boudreau
IPC: G01R31/00 , G01R31/12 , G01R35/00 , G01D5/14 , G01D5/20 , G01N27/72 , G01N27/82 , H01F5/04 , G01R33/00 , G01R33/025 , G01R33/032 , G01R33/12 , G01N27/90 , H01F5/00 , H01F27/34
Abstract: An apparatus comprises a first substrate and two coils supported by the first substrate and arranged next to each other, the coils configured to each generate a magnetic field which produces eddy currents in and a reflected magnetic field from a conductive target, the two coils arranged so their respectively generated magnetic fields substantially cancel each other in an area between the coils. One or more magnetic field sensing elements are positioned in the area between the coils and configured to detect the reflected magnetic field.
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公开(公告)号：US10649042B2
公开(公告)日：2020-05-12
申请号：US16394338
申请日：2019-04-25
Applicant: Allegro MicroSystems, LLC
Inventor： Alexander Latham , Michael C. Doogue , Jason Boudreau
IPC: G01R33/02 , G01R35/00 , G01D5/14 , G01D5/20 , G01N27/72 , G01N27/82 , G01R33/00 , G01R33/025 , G01R33/032 , G01R33/12 , G01N27/90 , H01F5/00 , H01F27/34
Abstract: An apparatus comprises a first substrate and two coils supported by the first substrate and arranged next to each other, the coils configured to each generate a magnetic field which produces eddy currents in and a reflected magnetic field from a conductive target, the two coils arranged so their respectively generated magnetic fields substantially cancel each other in an area between the coils. One or more magnetic field sensing elements are positioned in the area between the coils and configured to detect the reflected magnetic field.
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