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

CPC classification number: G01D5/142 ,  G01D5/147

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.

公开(公告)号：US20170356760A1

公开(公告)日：2017-12-14

申请号：US15176655

申请日：2016-06-08

Applicant: Allegro MicroSystems, LLC

Inventor： Paul A. David ,  Eric G. Shoemaker ,  Jeffrey Eagen

IPC: G01D5/14 ,  G01D5/16

CPC classification number: G01D5/142 ,  G01D5/147 ,  G01D5/16

Abstract: Magnetic field sensors can sense speed of movement and direction of movement of a ferromagnetic object. Particular arrangements of magnetic field sensing elements within the magnetic field sensor can automatically cancel offset variations in the magnetic field sensing elements.

公开(公告)号：US20170328739A1

公开(公告)日：2017-11-16

申请号：US15658757

申请日：2017-07-25

Applicant: Allegro MicroSystems, LLC

Inventor： Paul A. David ,  William P. Taylor

IPC: G01D5/14 ,  G01D5/20

Abstract: A magnetic field sensor has a plurality of magnetic field sensing elements and operates as a motion detector for sensing a rotation or other movement of a target object.

公开(公告)号：US20170314907A1

公开(公告)日：2017-11-02

申请号：US15655135

申请日：2017-07-20

Applicant: Allegro MicroSystems, LLC

Inventor： William P. Taylor ,  P. Karl Scheller ,  Paul A. David

IPC: G01B7/14 ,  G01R33/07 ,  G01R33/06 ,  G01R33/09 ,  G01D5/14

CPC classification number: G01B7/146 ,  G01D5/147 ,  G01R33/06 ,  G01R33/07 ,  G01R33/09

Abstract: A variety of magnetic field sensor arrangements provide so-called “tooth detectors” using a simple low-cost magnet.

公开(公告)号：US20160123774A1

公开(公告)日：2016-05-05

申请号：US14529577

申请日：2014-10-31

Applicant: ALLEGRO MICROSYSTEMS, LLC

Inventor： Andrea Foletto ,  Jeffrey Eagen ,  Paul A. David

IPC: G01D5/20

CPC classification number: G01D5/2046 ,  G01D5/145 ,  G01R33/09

Abstract: A magnetic field sensor operates as a motion detector for sensing a movement of a ferromagnetic target object having features. The magnetic field sensor has a plurality of magnetoresistance elements to generate, in a first channel, a feature signal indicative of a proximity of a feature of a ferromagnetic target object and, in a second channel, an edge signal indicative of a proximity of an edge of a feature of a ferromagnetic target object.

Abstract translation: 磁场传感器用作运动检测器，用于感测具有特征的铁磁性目标物体的运动。 磁场传感器具有多个磁阻元件，以在第一通道中产生指示铁磁性目标物体的特征接近的特征信号，并且在第二通道中产生指示边缘接近的边缘信号 铁磁目标物体的特征。

公开(公告)号：US20160028001A1

公开(公告)日：2016-01-28

申请号：US14877309

申请日：2015-10-07

Applicant: Allegro Microsystems, LLC

Inventor： Shixi Louis Liu ,  Harianto Wong ,  Paul A. David ,  John B. Sauber ,  Shaun D. Milano ,  Raguvir Kanda ,  Bruce Hemenway

IPC: H01L43/14 ,  H01L43/06 ,  H01L43/04

CPC classification number: H01L43/14 ,  G01R15/202 ,  G01R15/207 ,  G01R33/0052 ,  G01R33/09 ,  H01L21/4828 ,  H01L23/49548 ,  H01L24/13 ,  H01L24/16 ,  H01L24/81 ,  H01L43/04 ,  H01L43/065 ,  H01L2224/131 ,  H01L2224/16245 ,  H01L2224/81801 ,  H01L2924/15162 ,  H01L2924/014 ,  H01L2924/00014

Abstract: In one aspect, a method includes processing a metal substrate, performing a first etch on a first surface of the metal substrate to form, for an integrated circuit package, secondary leads and a curved component having two primary leads and performing a second etch, on a second surface of the substrate opposite the first surface, at locations on the secondary leads and locations on the curved component to provide a locking mechanism. Each primary lead located at a respective end of the curved component.

Abstract translation: 在一个方面，一种方法包括处理金属衬底，在金属衬底的第一表面上执行第一蚀刻，以形成用于集成电路封装的次级引线和具有两个初级引线并执行第二次蚀刻的弯曲元件 所述基板的与所述第一表面相对的第二表面，在所述次级引线上的位置和所述弯曲部件上的位置处，以提供锁定机构。 每个主引线位于弯曲部件的相应端部。

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

IPC: G01B7/30 ,  G01R33/07 ,  G01P3/44 ,  G01P3/488 ,  G01P3/489 ,  G01P13/04

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。

公开(公告)号：US20240347472A1

公开(公告)日：2024-10-17

申请号：US18300708

申请日：2023-04-14

Applicant: Allegro MicroSystems, LLC

Inventor： Vijay Mangtani ,  William P. Taylor ,  Paul A. David

IPC: H01L23/552 ,  H01F27/28 ,  H01L23/00 ,  H01L23/31 ,  H01L23/495 ,  H01L25/065

CPC classification number: H01L23/552 ,  H01F27/2804 ,  H01L23/3107 ,  H01L23/49575 ,  H01L24/48 ,  H01L25/0655 ,  H01L2224/48245

Abstract: Aspects of the present disclosure include systems, structures, circuits, and methods providing voltage-isolated integrated circuit (IC) packages or modules having a transformer integrated with or implemented on a lead frame. A portion of transformer windings may include a conductive portion of a lead frame. Conductive structure, such as wire bonds, may be used for other portions of transformer windings. In some examples, an insulating coating may be placed on the package to increase the isolation capability of the final package. The IC packages and modules may include various types of circuits; in some examples, IC packages or modules may include a galvanically isolated gate driver or other high voltage circuit.

公开(公告)号：US12061246B2

公开(公告)日：2024-08-13

申请号：US17654624

申请日：2022-03-14

Applicant: Allegro MicroSystems, LLC

Inventor： Paul A. David ,  William P. Taylor

IPC: G01R33/09 ,  G01D5/20 ,  G01R33/00 ,  G01R33/07

CPC classification number: G01R33/093 ,  G01D5/2013 ,  G01R33/07 ,  G01R33/09 ,  G01R33/00

Abstract: Methods and apparatus for detecting a magnetic field include a semiconductor substrate, a coil configured to provide a changing magnetic field in response to a changing current in the coil; and a magnetic field sensing element supported by the substrate. The coil receives the changing current and, in response, generates a changing magnetic field. The magnetic field sensing element detects the presence of a magnetic target by detecting changes to the magnetic field caused by the target and comparing them to an expected value.

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

IPC: H01L29/82 ,  G01D5/14 ,  G01R15/20 ,  G01R33/00 ,  G01R33/06

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.