Magnetoresistive sensor for detecting position or speed of a ferromagnetic body
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United States of America Patent
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-
Dec 8, 1987
Grant Date -
N/A
app pub date -
Feb 26, 1986
filing date -
Jul 20, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A magnetoresistive sensor used for emitting of electric signals in dependency on the position or the speed of a ferromagnetic body includes magnetoresistive measuring strips (10) on a substrate (12) which are exposed to a stationary magnetic field (H) such that a large field component (H.sub.y) extends perpendicular to the measuring strips and a substantially smaller field component (H.sub.x) in the plane of the measuring strips and at an angle of about 45.degree. to the direction of a measuring current flowing through the measuring strips. By approaching a ferromagnetic body (14) to the stationary field (H) additional field components (H.sub.z and H.sub.t) start acting on the measuring strips. The magnetic field component H.sub.t generated in the plane of the measuring strips changes in dependency on the position or speed of the ferromagnetic body and affects measuring current accordingly.
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