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公开(公告)号：US09625535B2
公开(公告)日：2017-04-18
申请号：US13960910
申请日：2013-08-07
Applicant: Allegro Microsystems, LLC
Inventor： Bryan Cadugan , Jim Rice
CPC classification number: G01R33/06 , G01D5/145 , G01R33/075
Abstract: In embodiments, three magnetic field sensing elements are arranged equidistantly from each other to define a plane and a central axis perpendicular to the plane. The magnetic field sensing elements are configured to generate a respective output signal representing proximity of a magnetic target that is proximate to the central axis and capable of moving relative to the central axis. A processor circuit is coupled to receive output signals from each of the sensors and configured to calculate a position of the magnetic target relative to the plane.
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公开(公告)号：US20160097825A1
公开(公告)日：2016-04-07
申请号：US14506024
申请日：2014-10-03
Applicant: Allegro Microsystems, LLC
Inventor： Craig S. Petrie , Bryan Cadugan , David Toebes , Michael C. Doogue , William P. Taylor
CPC classification number: G01R33/072 , G01D5/145 , G01D18/00 , G01R33/091
Abstract: A system includes a magnetic target and a magnetic field sensor. The magnetic field sensor comprises an output node; a circuit to detect a magnetic field produced by the magnetic target; and a processor. The processor may be configured to transmit a signal onto the output node representing the detected magnetic field; detect whether the transmitted signal is interrupted by an external source; and, if the signal is interrupted, initiate a self-test of the apparatus. Corresponding methods and apparatuses are also disclosed.
Abstract translation: 系统包括磁性靶和磁场传感器。 磁场传感器包括输出节点; 用于检测由磁性靶产生的磁场的电路; 和处理器。 处理器可以被配置为将信号发送到表示检测到的磁场的输出节点上; 检测发送信号是否被外部源中断; 并且如果信号被中断，则启动设备的自检。 还公开了相应的方法和装置。
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公开(公告)号：US20150192648A1
公开(公告)日：2015-07-09
申请号：US14529564
申请日：2014-10-31
Applicant: Allegro MicroSystems, LLC
Inventor： Paolo Campiglio , Bryan Cadugan , Claude Fermon , REMY LASSALLE-BALIER
CPC classification number: G11B5/3932 , G01R33/0052 , G01R33/09 , G01R33/093 , G01R33/098 , G11B5/39 , G11B5/3903 , G11B5/3906 , G11B5/3909 , G11B5/3929 , G11B2005/3996 , H01F10/3263 , H01F10/3272 , H01F41/306 , H01L43/02 , H01L43/08 , H01L43/10 , H01L43/12 , Y10T29/41
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.
Abstract translation: 磁阻元件具有钉扎布置，其具有两个反铁磁钉扎层，两个钉扎层和自由层。 两个反铁磁钉扎层之一和自由层之间的间隔层具有被选择为允许两个反铁磁钉扎层中的一个的可控部分钉扎的材料。
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公开(公告)号：US08885302B1
公开(公告)日：2014-11-11
申请号：US14042982
申请日：2013-10-01
Applicant: Allegro Microsystems, LLC
Inventor： Paul A. David , William P. Taylor , Bryan Cadugan
IPC: G11B5/33
CPC classification number: G01R33/0052 , G01R33/096 , H01L43/12
Abstract: Novel anisotropic magneto-resistive (AMR) sensor architectures and techniques for fabricating same are described. In some embodiments, AMR sensors having barber pole structures disposed below corresponding AMR sensing elements are provided. AMR sensors having segmented AMR sensing elements are also described. Fabrication techniques that can be used to fabricate such sensors are also described. Fabrication techniques are also described that can reduce the risk of contamination during AMR sensor fabrication.
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公开(公告)号：US20250067778A1
公开(公告)日：2025-02-27
申请号：US18944096
申请日：2024-11-12
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：US11791604B2
公开(公告)日：2023-10-17
申请号：US18152994
申请日：2023-01-11
Applicant: Allegro MicroSystems, LLC
Inventor： William P. Taylor , Bryan Cadugan
IPC: H01S3/10 , H01S5/00 , H01S5/068 , H01S5/50 , H01S3/0915 , H01S3/0941 , H01S3/30 , H01S5/026 , H01S5/40
CPC classification number: H01S5/0028 , H01S5/06812 , H01S5/5063 , H01S3/0915 , H01S3/0941 , H01S3/302 , H01S5/0262 , H01S5/4025 , H01S5/50
Abstract: Methods and apparatus for receiving a return laser pulse at a detector system having pixels in a pixel array and analyzing a response of the pixels in the pixel array including comparing the response to at least one threshold corresponding to decay of photonic energy of the laser pulse over distance and target reflectivity, wherein the at least one threshold comprises a first threshold corresponding to a low trigger for a pulse generated by a first type of laser and a second threshold corresponding to a high trigger for the pulse generated by the first type of laser. Embodiments can further include generating an alert signal based on the response of the pixels in the pixel array.
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公开(公告)号：US11768256B2
公开(公告)日：2023-09-26
申请号：US17810461
申请日：2022-07-01
Applicant: Allegro MicroSystems, LLC , Commissariat à l'énergie atomique et aux énergies alternatives
Inventor： Alexander Latham , Claude Fermon , Jason Boudreau , Myriam Pannetier-Lecoeur , Bryan Cadugan , Hernán D. Romero
Abstract: A magnetic field sensor includes at least one coil responsive to an AC coil drive signal; at least one magnetic field sensing element responsive to a sensing element drive signal and configured to detect a directly coupled magnetic field generated by the at least one coil and to generate a magnetic field signal in response to the directly coupled magnetic field; a processor responsive to the magnetic field signal to compute a sensitivity value associated with detection of the directly coupled magnetic field and substantially independent of a reflected magnetic field reflected by a conductive target disposed proximate to the at least one magnetic field sensing element; and an output signal generator configured to generate an output signal of the magnetic field sensor indicative of the reflected magnetic field.
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公开(公告)号：US20230228851A1
公开(公告)日：2023-07-20
申请号：US17566763
申请日：2021-12-31
Applicant: Allegro MicroSystems, LLC
Inventor： Andrew S. Huntington , Bryan Cadugan
CPC classification number: G01S7/4814 , G01S7/4816 , G01S7/4817 , G02B3/0087 , G02B5/18
Abstract: Lidar transmission optics and systems project more laser pulse energy per pixel instantaneous field-of-view (IFOV) to a portion of a sensor field of view (FOV), e.g., a portion that would be expected to have both close and distant objects of interest, and proportionally less pulse energy per pixel IFOV to other portions of the sensor FOV, e.g., those that would be expected to have or see only close objects of interest. Optics such as diffractive optical elements (DOEs), gradient-index (GRIN) lenses, and/or compound lens systems can be used for producing desired irradiance distributions having multiple parts or regions. The optics and systems improve range performance by providing for more efficient use of the total available laser pulse energy than transmit optics that project uniform pulse energy per pixel IFOV across the sensor FOV.
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公开(公告)号：US20230155344A1
公开(公告)日：2023-05-18
申请号：US18152994
申请日：2023-01-11
Applicant: Allegro MicroSystems, LLC
Inventor： William P. Taylor , Bryan Cadugan
CPC classification number: H01S5/0028 , H01S5/06812 , H01S5/5063 , H01S3/0915
Abstract: Methods and apparatus for receiving a return laser pulse at a detector system having pixels in a pixel array and analyzing a response of the pixels in the pixel array including comparing the response to at least one threshold corresponding to decay of photonic energy of the laser pulse over distance and target reflectivity, wherein the at least one threshold comprises a first threshold corresponding to a low trigger for a pulse generated by a first type of laser and a second threshold corresponding to a high trigger for the pulse generated by the first type of laser. Embodiments can further include generating an alert signal based on the response of the pixels in the pixel array.
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公开(公告)号：US20220294172A1
公开(公告)日：2022-09-15
申请号：US17197328
申请日：2021-03-10
Applicant: Allegro MicroSystems, LLC
Inventor： William P. Taylor , Bryan Cadugan
IPC: H01S3/0941 , H01S3/30 , H01S3/0915
Abstract: Methods and apparatus for a controlling a stimulus source to direct photons to a pixel in a pixel array contained in a detector system, analyzing a response of the pixel in the pixel array; and generating an alert based on the response of the pixel in the pixel array. Example stimulus sources include a conductive trace, a PN junction, and a current source.
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