Magnetoresistive head bias current switching based on skew angle

Details Magnetoresistive head bias current switching based on skew angle Magnetoresistive head bias current switching based on skew angle

1995-05-22

1997-03-25

Kim, W. C.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of biasing or erasing

360 7804, G11B 503, G11B 5596

Patent

active

056150636

ABSTRACT:
A controller 40 of an HDC 30 is connected to a drive 28, and an arm is rotated through a predetermined angle. A magnetic head 20 on the arm comprises a recording element and a reproduction element. A bias current is supplied to the magnetic head 20 from the controller 40 through a driver 36A and a switching circuit 32A, and the magnetic field of the disk 18A is detected in a detector 38A through a switching circuit 32A. The switching circuit 32A inverts the polarity of a current applied to the magnetic head 20A, by a signal from the controller 40 corresponding to a skew angle. Accordingly, the direction of the bias magnetic field is changed, the effective sensitivity position of the reproduction element approaches the recording element, and off-track can be reduced.

REFERENCES:
patent: 5436772 (1995-07-01), Sekiya et al.
patent: 5436773 (1995-07-01), Hanson
patent: 5461517 (1995-10-01), Suda et al.

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