System und Verfahren für Sensordiagnostik Während des Funktionsbetriebs

Details

Veröffentlichungs-Nr.

EP3564685

Aktenzeichen

EP19168893

Anmeldetag

12. April 2019

Veröffentlichung

8. Juni 2022

Erteilung

8. Juni 2022

Rechtsraum

EP

IPC

G01R1/14G01R31/00G01R33/00G01R33/025

Abstract

A system includes a magnetic field sense element for detecting an external magnetic field and a magnetic field source proximate the magnetic field sense element for providing a reference magnetic field. The magnetic field sense element produces a composite signal having reference and measurement signal portions, the reference signal portion being indicative of the reference magnetic field and the measurement signal portion being indicative of the external magnetic field. A power supply provides a supply current through the magnetic field source for continuously generating the reference magnetic field while the system is in an operational mode. A processing circuit processes the composite signal to produce a measurement output signal indicative of the external magnetic field. A qualification circuit, coupled with the processing circuit at multiple test points, detects the reference signal portion at the multiple test points and determines operability of the system from the detected reference signal portion.

Anmelder

Firma

NXP B.V.

Land

🇳🇱 Niederlande

Fachgebiete