Brief description of the measurement of a magnetic field sensor and of low magnetic field has impact improved

摘要

A magnetic field sensor comprises a magnetoresistive element (10) is biased by current (i) in order to measure an external magnetic field (hext). A magnetic field modulation (hm) is applied on a sensitive area of said sensor and the sensor comprises a device (14) of the synchronous detection, in order to measure the amplitude of an odd harmonics of the output signal.