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公开(公告)号：US09411025B2
公开(公告)日：2016-08-09
申请号：US13871131
申请日：2013-04-26
Applicant: Allegro Microsystems, LLC
Inventor： Paul David , Ravi Vig , William P. Taylor , Andreas P. Friedrich
CPC classification number: G01R33/093 , G01R33/0047 , H01L2224/32245 , H01L2224/48247 , H01L2224/73265 , H01L2924/181 , H01L2924/00 , H01L2924/00012
Abstract: A magnetic field sensor includes a lead frame having a plurality of leads, at least two of which have a connection portion and a die attach portion. A semiconductor die is attached to the die attach portion of the at least two leads and a separately formed ferromagnetic element, such as a magnet, is disposed adjacent to the lead frame.
Abstract translation: 磁场传感器包括具有多个引线的引线框架，其中至少两个引线框具有连接部分和管芯附接部分。 半导体管芯附接到至少两个引线的管芯附接部分，并且分开形成的铁磁元件（例如磁体）被布置成与引线框架相邻。
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12.发明申请公开(公告)号：US20140084904A1
公开(公告)日：2014-03-27
申请号：US14093815
申请日：2013-12-02
Applicant: Allegro Microsystems, LLC
Inventor： Ravi Vig , P. Karl Scheller , Paul A. David
IPC: G01P3/44
CPC classification number: G01P3/44 , G01D5/142 , G01P3/488 , G01P3/489 , G01P13/045 , G01R33/0041 , G01R33/07
Abstract: An apparatus and a method provide an output signal indicative of a speed of rotation and a direction of rotation of a ferromagnetic object capable of rotating. A variety of signal formats of the output signal are described.
Abstract translation: 装置和方法提供表示能够旋转的铁磁体的旋转速度和旋转方向的输出信号。 描述了输出信号的各种信号格式。
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公开(公告)号：US11828819B2
公开(公告)日：2023-11-28
申请号：US18046222
申请日：2022-10-13
Applicant: Allegro MicroSystems, LLC
Inventor： Ravi Vig , William P. Taylor , Andreas P. Friedrich , Paul A. David , Marie-Adelaide Lo , Eric Burdette , Eric G. Shoemaker , Michael C. Doogue
CPC classification number: G01R33/0047 , G01B7/30 , G01D5/145 , G01R15/202 , G01R33/0011 , G01R33/072 , H01L2224/48247 , H01L2924/19105
Abstract: A magnetic field sensor includes a lead frame, a passive component, semiconductor die supporting a magnetic field sensing element and attached to the lead frame, a non-conductive mold material enclosing the die and at least a portion of the lead frame, and a ferromagnetic mold material secured to a portion of the non-conductive mold material. The lead frame has a recessed region and the passive component is positioned in the recessed region. The ferromagnetic mold material may comprise a soft ferromagnetic material to form a concentrator or a hard ferromagnetic material to form a bias magnet.
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公开(公告)号：US20230057390A1
公开(公告)日：2023-02-23
申请号：US18046222
申请日：2022-10-13
Applicant: Allegro MicroSystems, LLC
Inventor： Ravi Vig , William P. Taylor , Andreas P. Friedrich , Paul A. David , Marie-Adelaide Lo , Eric Burdette , Eric G. Shoemaker , Michael C. Doogue
Abstract: A magnetic field sensor includes a lead frame, a passive component, semiconductor die supporting a magnetic field sensing element and attached to the lead frame, a non-conductive mold material enclosing the die and at least a portion of the lead frame, and a ferromagnetic mold material secured to a portion of the non-conductive mold material. The lead frame has a recessed region and the passive component is positioned in the recessed region. The ferromagnetic mold material may comprise a soft ferromagnetic material to form a concentrator or a hard ferromagnetic material to form a bias magnet.
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公开(公告)号：US10012518B2
公开(公告)日：2018-07-03
申请号：US15176645
申请日：2016-06-08
Applicant: Allegro MicroSystems, LLC
Inventor： Paul A. David , Ravi Vig
Abstract: A back-biased magnetic field sensor uses one or more magnetic field sensing elements upon a substrate, each outside of a substrate region in which magnetic field lines are near perpendicular to the substrate and outside of which magnetic field lines are not to the substrate. The back-biased magnetic field sensor can sense an approaching and/or a retreating ferromagnetic object.
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Patent Agency Ranking
公开(公告)号：US20170356761A1
公开(公告)日：2017-12-14
申请号：US15176665
申请日：2016-06-08
Applicant: Allegro MicroSystems, LLC
Inventor： Ravi Vig , Paul A. David , Eric G. Shoemaker
IPC: G01D5/14
Abstract: Magnetic field sensors can sense speed of movement and direction of movement of a ferromagnetic object. The magnetic field sensors employ both planar Hall effect elements and vertical Hall effect elements to generate two-state signals in two different signal paths with relative phases that are ninety degrees apart, the ninety degrees having sufficient margin to aid in detection of the direction of motion. Other magnetic field sensors use at least four vertical Hall effect elements to identify a speed of rotation and a direction of rotation of a moving ferromagnetic object.
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17.发明授权公开(公告)号：US09151807B2
公开(公告)日：2015-10-06
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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18.发明授权Apparatus and method for providing an output signal indicative of a speed of rotation and a direction of rotation of a ferromagnetic object 有权用于提供表示铁磁物体的旋转速度和旋转方向的输出信号的装置和方法公开(公告)号：US09151771B2
公开(公告)日：2015-10-06
申请号：US14093787
申请日：2013-12-02
Applicant: Allegro Microsystems, LLC
Inventor： Ravi Vig , P. Karl Scheller , Paul A. David
CPC classification number: G01P3/44 , G01D5/142 , G01P3/488 , G01P3/489 , G01P13/045 , G01R33/0041 , G01R33/07
Abstract: An apparatus and a method provide an output signal indicative of a speed of rotation and a direction of rotation of a ferromagnetic object capable of rotating. A variety of signal formats of the output signal are described.
Abstract translation: 装置和方法提供表示能够旋转的铁磁体的旋转速度和旋转方向的输出信号。 描述了输出信号的各种信号格式。
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公开(公告)号：US20240222526A1
公开(公告)日：2024-07-04
申请号：US18603298
申请日：2024-03-13
Applicant: Allegro MicroSystems, LLC
Inventor： Ravi Vig , William P. Taylor , Paul A. David , P. Karl Scheller , Andreas P. Friedrich
CPC classification number: H01L29/82 , G01D5/147 , G01R33/0047 , G01R33/0052 , G01R33/06 , G01R15/207 , H01L2224/45147 , H01L2224/48247 , H01L2924/00011
Abstract: An integrated circuit package and method of fabrication are described. The integrated circuit package includes a lead frame having a first surface and a second opposing surface and a semiconductor die having a first, active surface in which circuitry is disposed and a second opposing surface attached to the first surface of the lead frame. A magnet attached to the second surface of the lead frame has a non-contiguous central region and at least one channel extending laterally from the central region. An overmold material forms an enclosure surrounding the magnet, semiconductor die, and a portion of the lead frame.
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公开(公告)号：US10916665B2
公开(公告)日：2021-02-09
申请号：US16252789
申请日：2019-01-21
Applicant: Allegro MicroSystems, LLC
Inventor： Ravi Vig , William P. Taylor , Paul A. David , P. Karl Scheller , Andreas P. Friedrich
Abstract: A magnetic field sensor includes a lead frame, a semiconductor die having a first surface in which a magnetic field sensing element is disposed and a second surface attached to the lead frame, and a non-conductive mold material enclosing the die and at least a portion of the lead frame. The sensor may include a ferromagnetic mold material secured to a portion of the non-conductive mold material. Features include a multi-sloped taper to an inner surface of a non-contiguous central region of the ferromagnetic mold material, a separately formed element disposed in the non-contiguous central region, one or more slots in the lead frame, a molded ferromagnetic suppression device spaced from the non-conductive mold material and enclosing a portion of a lead, a passive device spaced from the non-conductive mold material and coupled to a plurality of leads, and a ferromagnetic bead coupled to a lead. Also described is a coil secured to the non-conductive mold material and a lead having at least two separated portions with a passive component coupled across the two portions.
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