MAGNETORESISTIVE SENSOR DEVICE AND METHOD OF PROCESSING A SIGNAL THEREOF

摘要

The invention relates to a method and a sensor device (1) for measuring a magnetic field comprising a first circuit (4) including a magneto sensitive sensor element (2) and a current source (5) and a second circuit (6) including a signal generator (7) and a coil (3) producing a excitational magnetic field at the sensor element (2), wherein the output signal of the sensor element is processible such that a second derivative of the sensor signal and the signal of the signal generator are derivable which are processible such that a countable signal is resulting being a measure of the magnetic field.