公开(公告)号：US11169223B2

公开(公告)日：2021-11-09

申请号：US16826451

申请日：2020-03-23

Applicant: Allegro MicroSystems, LLC

Inventor： Till-Jonas Ostermann ,  Dominik Geisler ,  Simon Rock ,  Fabian Winkler

IPC: G01R19/00 ,  G01R33/07 ,  G01R33/00 ,  G01B7/30 ,  G01D5/14

Abstract: In one aspect, an angle sensor includes a first Hall element disposed on a first axis, a second Hall element disposed on a second axis perpendicular to the first axis and a conduction path having a first portion extending parallel to the first axis and a second portion parallel to the second axis. The conduction path is configured to conduct a calibration current that generates a first magnetic flux density measured at the first Hall element and a second magnetic flux density measured at the second Hall element. The angle sensor also includes calibration circuitry configured to generate one or more compensation signals based on the first and second magnetic flux densities and to adjust an external magnetic flux density measured at the second Hall element due to an external magnetic field using the one or more compensation signals to reduce angle error of the angle sensor.

公开(公告)号：US20210293904A1

公开(公告)日：2021-09-23

申请号：US16826451

申请日：2020-03-23

Applicant: Allegro MicroSystems, LLC

Inventor： Till-Jonas Ostermann ,  Dominik Geisler ,  Simon Rock ,  Fabian Winkler

IPC: G01R33/07 ,  G01R33/00 ,  G01D5/14 ,  G01B7/30

Abstract: In one aspect, an angle sensor includes a first Hall element disposed on a first axis, a second Hall element disposed on a second axis perpendicular to the first axis and a conduction path having a first portion extending parallel to the first axis and a second portion parallel to the second axis. The conduction path is configured to conduct a calibration current that generates a first magnetic flux density measured at the first Hall element and a second magnetic flux density measured at the second Hall element. The angle sensor also includes calibration circuitry configured to generate one or more compensation signals based on the first and second magnetic flux densities and to adjust an external magnetic flux density measured at the second Hall element due to an external magnetic field using the one or more compensation signals to reduce angle error of the angle sensor.