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21. 发明授权

US11115084B2 Isolated data transfer system 有权
公开(公告)号：US11115084B2
公开(公告)日：2021-09-07
申请号：US16200799
申请日：2018-11-27
申请人： Allegro MicroSystems, LLC , Commissariat à l'énergie atomique et aux énergies alternatives
发明人： Alexander Latham , Claude Fermon , Myriam Pannetier-Lecoeur
IPC分类号： H04B5/00
摘要： Methods and apparatus for providing data transfer with a drive coil to transmit information, a receive coil magnetically coupled to the drive coil, and a first magnetoresistive sensor proximate the receive coil to detect information from the receive coil. In embodiments, the drive and receive coils are separated by an isolation material. In embodiments, a signal isolator IC packages includes transmit and receive coils and a magnetic field sensing element coupled to the receive coil.

22. 发明申请

US20210223292A1 CURRENT SENSOR INTEGRATED CIRCUITS 有权
公开(公告)号：US20210223292A1
公开(公告)日：2021-07-22
申请号：US16884311
申请日：2020-05-27
申请人： Allegro MicroSystems, LLC
发明人： Shixi Louis Liu , Paul A. David , Shaun D. Milano , Rishikesh Nikam , Alexander Latham , Wade Bussing , Natasha Healey , Georges El Bacha
IPC分类号： G01R15/08 , H01L43/06 , H01L43/04
摘要： A current sensor integrated circuit (IC) includes a unitary lead frame having at least one first lead having a terminal end, at least one second lead having a terminal end, and a paddle having a first surface and a second opposing surface. A semiconductor die is supported by the first surface of the paddle, wherein the at least one first lead is electrically coupled to the semiconductor die and the at least one second lead is electrically isolated from the semiconductor die. The current sensor IC further includes a first mold material configured to enclose the semiconductor die and the paddle and a second mold material configured to enclose at least a portion of the first mold material, wherein the terminal end of the at least one first lead and the terminal end of the at least one second lead are external to the second mold material.

23. 发明授权

US10914765B1 Multi-die integrated current sensor 有权
公开(公告)号：US10914765B1
公开(公告)日：2021-02-09
申请号：US16527636
申请日：2019-07-31
申请人： Allegro MicroSystems, LLC
发明人： Wade Bussing , Alexander Latham
IPC分类号： G01R15/20 , H01L43/02 , H01L43/08 , H01L43/06
摘要： A current sensor can include a lead frame. The lead frame can include a first lead and a second lead, wherein the first and second leads are coupled together at a first junction region of the lead frame, wherein the current sensor is operable to sense a magnetic field generated by a first current passing through the first junction region. The current sensor can further include a first die disposed proximate to the lead frame. The first die can include a first magnetic field sensing element disposed on a surface of the first die, a first circuit coupled to the first magnetic field sensing element for generating a first signal indicative of a first current, and a first node coupled to the first signal. The current sensor can further include a second die disposed proximate to the lead frame. The second die can include a second magnetic field sensing element disposed on a surface of the second die, a second circuit coupled to the second magnetic field sensing element for generating a second signal indicative of the first current passing through the first junction region or indicative of a second current passing through the lead frame and a second node coupled to the second signal.

24. 发明申请

US20210018576A1 MAGNETIC FIELD SENSORS HAVING A MAGNETIC ANTI-ALIASING FILTER 有权
公开(公告)号：US20210018576A1
公开(公告)日：2021-01-21
申请号：US16512680
申请日：2019-07-16
申请人： Allegro MicroSystems, LLC
发明人： Alexander Latham , Evan Shorman
IPC分类号： G01R33/07 , G01R33/00 , H05K9/00
摘要： A magnetic field sensor includes a substrate, a first channel comprising a first magnetic field sensing element supported by the substrate and configured to generate a first magnetic field signal indicative of a first magnetic field experienced by the first magnetic field sensing element, a second channel comprising a second magnetic field sensing element supported by the substrate and configured to generate a second magnetic field signal indicative of a second magnetic field experienced by the second magnetic field sensing element, and at least one shield configured to reduce a bandwidth of the first magnetic field by a first amount and to reduce a bandwidth of the second magnetic field by a second amount. The shield is able to act as a magnetic anti-aliasing filter for the magnetic field sensing elements, which can then be chopped or sampled.

25. 发明申请

US20200241084A1 Packages For Coil Actuated Position Sensors 审中-公开
公开(公告)号：US20200241084A1
公开(公告)日：2020-07-30
申请号：US16851473
申请日：2020-04-17
申请人： Allegro MicroSystems, LLC
发明人： Alexander Latham , Michael C. Doogue , Jason Boudreau
IPC分类号： G01R33/00 , G01R33/025 , G01R33/032 , G01R33/12 , G01N27/90 , H01F5/00
摘要： 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.

26. 发明申请

US20190285667A1 Systems and Methods for Integrated Shielding in a Current Sensor 审中-公开
公开(公告)号：US20190285667A1
公开(公告)日：2019-09-19
申请号：US16421982
申请日：2019-05-24
申请人： Allegro MicroSystems, LLC
发明人： Shaun D. Milano , Bryan Cadugan , Michael C. Doogue , Alexander Latham , William P. Taylor , Harianto Wong , Sundar Chetlur
IPC分类号： G01R15/14 , G01R15/20 , G01R19/00
摘要： 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.

27. 发明申请

US20190265018A1 ANGLE SENSOR USING EDDY CURRENTS 审中-公开
公开(公告)号：US20190265018A1
公开(公告)日：2019-08-29
申请号：US16282539
申请日：2019-02-22
申请人： Allegro MicroSystems, LLC
发明人： Alexander Latham , Maxim Klebanov
IPC分类号： G01B7/30 , G01R33/00 , G01R33/028 , G01R33/06
摘要： Methods and apparatus for a sensor with a main coil to direct a magnetic field at a rotating target for inducing eddy currents in an end of the target and a sensing element to detect a magnetic field reflected from the target, wherein the target end comprises a conductive surface. The reflected magnetic field can be processed to determine an angular position of the target.

28. 发明授权

US10310028B2 Coil actuated pressure sensor 有权
公开(公告)号：US10310028B2
公开(公告)日：2019-06-04
申请号：US15606362
申请日：2017-05-26
申请人： Allegro MicroSystems, LLC , COMMISSARIAT À L'ÉNERGIE ATOMIQUE ET AUX ÉNERGIES ALTERNATIVES
发明人： Alexander Latham , Michael C. Doogue , Claude Fermon , Xavier Du Hamel De Milly , Myriam Pannetier-Lecoeur
IPC分类号： G01R33/07 , G01R33/00 , G01R33/09 , G01R33/30 , G01L9/00 , G01L13/02
摘要： A pressure sensor includes a chamber comprising a conductive portion and a deformable portion coupled to the conductive portion and susceptible to deformation in response to a pressure differential between an interior of the chamber and an exterior of the chamber; at least one coil responsive to an AC coil drive signal; at least one magnetic field sensing element disposed proximate to the at least one coil and to the conductive portion of the chamber and configured to generate a magnetic field signal in response to a reflected magnetic field generated by the at least one coil and reflected by the conductive portion; and a circuit coupled to the at least one magnetic field sensing element to generate an output signal of the pressure sensor indicative of the pressure differential between the interior of the chamber and the exterior of the chamber in response to the magnetic field signal.

29. 发明申请

US20190018079A1 METHODS AND APPARATUS FOR SENSOR HAVING FAULT TRIP LEVEL SETTING 审中-公开
公开(公告)号：US20190018079A1
公开(公告)日：2019-01-17
申请号：US16127295
申请日：2018-09-11
申请人： Allegro MicroSystems, LLC
发明人： Alexander Latham , Stephen Marshall , Aaron Cook
IPC分类号： G01R33/07 , G01R33/00
摘要： Methods and apparatus for a sensor having non-ratiometric fault trip level setting. In embodiments, a sensor has a sensing element with a fixed gain. A signal processing module receives the fault trip level setting and maintains the fault trip level setting constant during changes in the supply voltage.

30. 发明申请

US20180340987A1 Packages For Coil Actuated Position Sensors 审中-公开
公开(公告)号：US20180340987A1
公开(公告)日：2018-11-29
申请号：US15606262
申请日：2017-05-26
申请人： Allegro MicroSystems, LLC
发明人： Alexander Latham , Michael C. Doogue , Jason Boudreau
IPC分类号： G01R33/00 , G01R33/025 , H01F5/04
CPC分类号： G01R33/0094 , G01R33/0005 , G01R33/0011 , G01R33/0017 , G01R33/0029 , G01R33/025 , G01R33/032 , G01R33/1284 , H01F5/04
摘要： An apparatus comprises one or more substrates and one or more coils. At least one of the coils is configured to produce a first magnetic field that induces eddy currents in a conductive target, which generates a reflected magnetic field. One or more magnetic field sensing elements supported by the one or more substrates detect the reflected magnetic field. A conductive support structure supports the one or more substrates. The support structure includes a gap in an area adjacent to the one or more coils so that the support structure does not generate a reflected magnetic field in response to the first magnetic field.

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