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

IPC: G01R33/00 ,  G01B7/30

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.

公开(公告)号：US09621140B1

公开(公告)日：2017-04-11

申请号：US14996689

申请日：2016-01-15

Applicant: Allegro Microsystems, LLC

Inventor： Devon Fernandez ,  Eric Burdette

IPC: H03K3/00 ,  H03K5/04 ,  H03K17/64 ,  H03K17/60 ,  G01R33/06

CPC classification number: H03K5/04 ,  G01R33/0023 ,  G01R33/0041 ,  G01R33/06

Abstract: An electronic circuit has a current generator circuit that generates a two-state output current signal for which a transition between states is altered.

公开(公告)号：US20150022193A1

公开(公告)日：2015-01-22

申请号：US13946417

申请日：2013-07-19

Applicant: ALLEGRO MICROSYSTEMS, LLC

Inventor： Eric Burdette ,  William P. Taylor

IPC: G01R33/06 ,  G01R33/09 ,  G01N27/72

CPC classification number: G01R33/06 ,  G01N27/72 ,  G01R33/093

Abstract: Methods and apparatus for detecting a magnetic field include a magnetic source configured to provide a magnetic field to induce an eddy current in a non-ferromagnetic target, and a magnetic field sensing element configured to detect the magnetic field as a result of the eddy current. The magnetic field provided by the magnetic source can be a static (i.e. DC) field or a changing (i.e. non-DC) field.

Abstract translation: 用于检测磁场的方法和装置包括被配置为提供磁场以在非铁磁目标中感应涡流的磁源和被配置为由涡流检测结果来检测磁场的磁场感测元件。 由磁源提供的磁场可以是静态（即DC）场或变化（即非DC）场。

公开(公告)号：US20140232380A1

公开(公告)日：2014-08-21

申请号：US14259662

申请日：2014-04-23

Applicant: Allegro Microsystems, LLC

Inventor： Andrea Foletto ,  Devon Fernandez ,  Eric Burdette

IPC: G01D5/12

CPC classification number: G01D5/12 ,  G01D5/145 ,  G01D5/2448 ,  G01P3/487 ,  G01P3/488 ,  G01P3/489 ,  G01P21/02 ,  G01R25/005

Abstract: A motion sensor has a state processor to identify states associated with a magnetic field signal provided by a magnetic field sensing element. The state processor includes a state peak logic module configured to generate states that have a reduced amount of state chatter.

Abstract translation: 运动传感器具有状态处理器，用于识别与由磁场感测元件提供的磁场信号相关联的状态。 状态处理器包括状态峰值逻辑模块，其被配置为产生具有减少的状态抖动量的状态。