Patent · US Active

Magnetoresistive sensor with stray field cancellation and systems incorporating same

US10591320B2 · kind B2 · utility

1Cited by

4References

17Claims

0Family size

Assignee

NXP B.V. · NL

Inventors

Stephan Marauska · Kaltenkirchen, DE
Jan Przytarski · Hamburg, DE
Jörg Kock · Burgwedel, DE
Edwin Schapendonk · Oss, NL

Key dates

Filing date	Dec 11, 2017
Grant date	Mar 17, 2020
Priority date	—
Expiry date	Jun 12, 2038

Classification

Technology area (CPC G)Physics
CPC primaryG01R33/098
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A system includes a magnetic sense element for detecting an external magnetic field along a sensing axis and a magnetic field source proximate the magnetic sense element for providing an auxiliary magnetic field along the sensing axis. The magnetic sense element produces a first output signal having a magnetic field signal component, responsive to the external magnetic field, that is modulated by an auxiliary magnetic field signal component responsive to the auxiliary magnetic field. A processing circuit identifies from the first output signal an influence of a magnetic interference field on the auxiliary magnetic field signal component, the magnetic interference field being directed along a non-sensing axis of the magnetic sense element, and applies a correction factor to the magnetic field signal component to produce a second output signal in which the influence of the magnetic interference field is substantially removed.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.