Magnetic field sensor constructed from a remagnetization line and one magnetoresistive resistor or a plurality of magnetoresistive resistors

摘要

PCT No. PCT/EP94/01789 Sec. 371 Date Jan. 31, 1995 Sec. 102(e) Date Jan. 31, 1995 PCT Filed May 31, 1994 PCT Pub. No. WO94/29740 PCT Pub. Date Dec. 22, 1994.Described is a sensor based on the magnetoresistive effect and integrated into the thin-film arrangement of a remagnetization line in the form of a meander. In an adaptation to this meandering structure, the magnetoresistive film strips are provided in regions with alternating positive- and negative-inclined Barber pole structures. When periodic remagnetization of the regions takes place, a drift-free AC voltage is obtained as a sensor output signal. This lack of drift is the presupposition for the use of the magnetic field sensor for precise measurement of weak magnetic fields.