Magnetic disk apparatus and method that reverses sense current i

Details Magnetic disk apparatus and method that reverses sense current i Magnetic disk apparatus and method that reverses sense current i

1996-03-19

1999-04-13

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7704, 360 75, G11B 5596

Patent

active

058943757

ABSTRACT:
Recording signals can be reproduced without needing a deviation of a recording magnetic pole and a magneto-resistive element in a track width direction and without causing an off-track in a whole region from the inner side to the outer side. A sense current supplying circuit which supplies a predetermined sense current to the magneto-resistive element and can switch the direction of the sense current is provided. By control means such as an MPU or the like, the direction of the sense current by the sense current supplying circuit is switched in accordance with a cylinder position of a combination head, thereby magnetically changing the center position of a reproducing sensitivity of the magneto-resistive element in a track width direction. The combination head has a structure such that a geometrical center position of the magneto-resistive element in a read head and a geometrical center position of a recording magnetic pole in a write head are made to coincide in the track direction.

REFERENCES:
patent: 4841398 (1989-06-01), Mowry
patent: 5367411 (1994-11-01), Nishiyama et al.
patent: 5436773 (1995-07-01), Hanson
patent: 5444589 (1995-08-01), Hu et al.
patent: 5719719 (1998-02-01), Tsuyoshi et al.

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