Patent ID: 9575142
Date: 2017-02-21
CPC Classifications: G01B,G01D,G01R,G11B

Claim:
1. A sensor arrangement for position sensing, comprising a magnetic field source, a magnetoresistive element arranged in a magnetic field generated by the magnetic field source and providing an output signal (R) dependent on a position (x) of the magnetoresistive element relative to the magnetic field source, and a feedback controller configured to receive the output signal (R) of the magnetoresistive element and to adjust one or more of the position (x) of the magnetoresistive element relative to the magnetic field source and a strength of the magnetic field generated by the magnetic field source acting on the magnetoresistive element dependent on the output signal (R) of the magnetoresistive element, wherein the magnetic field source comprises an electromagnet for generating the magnetic field dependent on an electrical current applied to the electromagnet, and wherein the feedback controller is configured to adjust the strength of the magnetic field acting on the magnetoresistive element by controlling the electrical current supplied to the electromagnet.