Magnetic sensor for magnetically detecting the position of a mov

Details Magnetic sensor for magnetically detecting the position of a mov Magnetic sensor for magnetically detecting the position of a mov

1986-10-08

1988-11-22

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Magnetic

Displacement

324262, 324252, 338 32R, G01B 728

Patent

active

047868708

ABSTRACT:
A magnetic position detector having a rotary magnetic recording medium which is movable with a movable body the position of which is to be detected. The rotary magnetic recording medium is divided into plural channels, each of which includes two tracks. A magnetic sensor is disposed to face the magnetic recording medium with a predetermined air gap therebetween and includes two sets of magnetoresistive elements spaced by a predetermined distance for each channel. Each set of magnetoresistive elements includes two elements wherein the first elements of the two sets face one of the tracks of a channel and the second elements of the other of the two sets faces the other track and the first and second elements of the two sets are formed as one body with adjacent ends of the first and second elements being coupled with each other. The coupled adjacent ends are connected to either one of first terminals for deriving output voltages from the magnetoresistive elements or to second terminals for supplying the magnetoresistive elements with source voltage. The non-adjacent ends of the first and second elements which are opposite to the coupled ends are connected to the other of the first and second terminals. In this manner, the sensor can be made small in size and the resistivity against noise is enhanced.

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