Magneto resistive sensor applies pulsed test magnetic field from current carrying wire and obtains functional or fail or revised calibration signal

摘要

A magneto resistive sensor (2) test system excites the sensor between expected measurements (b) with a known periodic magnetic field from a current carrying wire (8) and filters (a) and processes (5) this to give a functional or fail signal or new calibration transmitted to a central processor over a system bus.