公开(公告)号：US20250076421A1

公开(公告)日：2025-03-06

申请号：US18458441

申请日：2023-08-30

Applicant: Allegro MicroSystems, LLC

Inventor： Tyler Daigle ,  Steven Daubert ,  Srujan Shivanakere ,  Craig Hiller

IPC: G01R33/09 ,  G01R33/00

Abstract: Methods and apparatus for a magnetic field sensor having a first set of MR elements configured to change in resistance due to an applied magnetic field having an orientation in a sensitive axis of the first set of MR elements and a second set of MR elements that are immune to the applied magnetic field. The second set of MR elements is configured to change in resistance due to temperature. A processor can compensate for the response of the first set of MR elements based on the temperature information from the second set of MR elements.

公开(公告)号：US20240264248A1

公开(公告)日：2024-08-08

申请号：US18164676

申请日：2023-02-06

Applicant: Allegro MicroSystems, LLC

Inventor： Tyler Daigle ,  Srujan Shivanakere ,  Maxwell McNally ,  Alec Smith ,  Steven Daubert

IPC: G01R33/07 ,  H10N52/01

CPC classification number: G01R33/07 ,  H10N52/01

Abstract: Methods and apparatus for canceling inductive coupling in a magnetic field sensing device having one or more Hall elements. A device can include a Hall element having a first pair of first and second voltage sensing terminals at diametrically opposed locations on the Hall element, and a second pair of third and fourth voltage sensing terminals diametrically opposed locations on the Hall element. A first mirror conductive path extends around a perimeter of the Hall element in a first direction a second mirror conductive path extends around the perimeter of the Hall element in a second direction so that the first and second mirror conductive paths are on opposite sides of the Hall element and are equal and opposite to cancel inductive coupling.

公开(公告)号：US20250147128A1

公开(公告)日：2025-05-08

申请号：US18503333

申请日：2023-11-07

Applicant: Allegro MicroSystems, LLC

Inventor： Tyler Daigle ,  Maxwell McNally ,  Steven Daubert ,  Alexander Latham

IPC: G01R33/09

Abstract: Methods and apparatus for a magnetic field sensor IC package having groups of arrays of TMR elements each having a pinning direction. An on-chip coil is routed under the TMR elements to conduct current for generating a magnetic field to stimulate the TMR elements. The device may be configured to sense changes in an applied magnetic field.

公开(公告)号：US12140646B2

公开(公告)日：2024-11-12

申请号：US18164676

申请日：2023-02-06

Applicant: Allegro MicroSystems, LLC

Inventor： Tyler Daigle ,  Srujan Shivanakere ,  Maxwell McNally ,  Alec Smith ,  Steven Daubert

IPC: G01R33/07 ,  H10N52/01

Abstract: Methods and apparatus for canceling inductive coupling in a magnetic field sensing device having one or more Hall elements. A device can include a Hall element having a first pair of first and second voltage sensing terminals at diametrically opposed locations on the Hall element, and a second pair of third and fourth voltage sensing terminals diametrically opposed locations on the Hall element. A first mirror conductive path extends around a perimeter of the Hall element in a first direction a second mirror conductive path extends around the perimeter of the Hall element in a second direction so that the first and second mirror conductive paths are on opposite sides of the Hall element and are equal and opposite to cancel inductive coupling.