MAGNETORESISTIVE SENSOR FOR PRODUCING ELECTRIC SIGNALS

摘要

The magnetoresistive sensor is used for the production of electric signals as a function of the position or the number of revolutions of a ferromagnetic body. To this aim, measurement bands (10) arranged on a substrate (12) are obliquely traversed by a continuous stationary magnetic field (H) so that a large component of the field extends perpendicularly to the measurement bands (10) whereas a substantially smaller component extends in the plane of the measurement bands (10) with an angle of about 45 with respect to the current in the bands (10). When approaching the stationary continuous field (H), a ferromagnetic body (14) generates a measurement signal in the bands (10) due to the fact that the direction of the component of the continuous field situated in the plane of the measurement bands (10) is modified as a function of the position of the ferromagnetic body (14). Such a sensor (11) may be used to count a number of revolutions, to measure a distance or as a position sensor in a large application field.