Magnetic field sensor for use in magneto resistive element, particularly four elements in bridge connection, has chip arranged on substrate or even formed on substrate

摘要

The magnetic field sensor has a chip (50), which is arranged on the substrate (40) or even formed on the substrate. The magneto resistive element (41 to 44) has a hysteresis-afflicted characteristic and a magnetic current is detected by a magneto resistive element as a magnetic field signal. The magneto resistive element has a medium, by which the characteristic of the magneto resistive element is improved and hysteresis is reduced. The hysteresis-characteristics is reduced over the signal current by superimposed of a high frequency demagnetizing pulse.