Magnetic sensor device with robust signal processing

摘要: The invention relates to a magnetic sensor device (100) comprising field generator (1) driven with an excitation current of first frequency (f1) and element (e.g. GMR (2)) (I2) second (f2) for measuring reaction fields (HB) generated by magnetized particles (3). In associated evaluation unit (10), reference component (uQ) the measurement signal (uGMR) is separated that depends on (I1) but not presence may particularly be produced combination self- magnetization (H2) (2) cross-talk related currents. isolated based its phase respect particle-dependent or scaling one frequencies. Monitoring reveals variations in operating conditions, example gain, can used calibrate results.