Magnetic movement sensing device

Details Magnetic movement sensing device Magnetic movement sensing device

1989-10-12

1992-05-26

Wolff, John W.

Dynamic magnetic information storage or retrieval

Head

Hall effect

G11B 5127

Patent

active

051173190

ABSTRACT:
A magnetic sensor for an encoder having tracks arranged alternately with N- and S-poles, comprising two MR thin films arranged at a near interval in the track direction with a direction perpendicular to the tracks as a longitudinal direction, oblique electrode formed obliquely to the longitudinal direction on the magnetoresistance effect detecting magnetic thin films to generate a bias magnetic field of opposite directions parallel to the tracks by a current flowing to the oblique electrodes in the MR thin films, thereby detecting poles arranged at random intervals.

REFERENCES:
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patent: 4477794 (1984-10-01), Nomura et al.
patent: 4492997 (1985-01-01), Arai et al.
patent: 4503394 (1985-03-01), Kawakami et al.
patent: 4535375 (1985-08-01), Mowry et al.
patent: 4556925 (1985-12-01), Suenaga et al.
patent: 4616281 (1986-10-01), Nakamura
patent: 4639806 (1987-01-01), Kira et al.
patent: 4698711 (1987-10-01), Vinal
IBM/TDB vol. 20, No. 2, Jul. 1977 "Magnetically coupled Barberpole MR Head . . . " by Romankiw.

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