Erase device for a magnetic layer memory having relative motion

Details Erase device for a magnetic layer memory having relative motion Erase device for a magnetic layer memory having relative motion

1990-06-13

1992-01-07

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of biasing or erasing

G11B 547

Patent

active

050796496

ABSTRACT:
An erase device for a magnetic layer memory having relative motion of a storage medium with respect to a combined magnetic head system includes a magnetic erase head having a single coil winding. Both ends of the winding of the erase head can be connected to a DC supply voltage via a respective inductor and, via a respective switch, to a potential that deviates from the DC voltage. The switches are alternately activated for identical time intervals by complementary control pulse sequences. The drive circuit for the erase head forms a DC-AC converter having symmetrical drive of the erase head.

REFERENCES:
patent: 3354270 (1967-11-01), Smith et al.
patent: 3480739 (1969-11-01), Kinkel
patent: 4466027 (1984-08-01), Howell et al.
Jeffries, K. L., "Symmetric AC Bias Signal for Analog Magnetic Recording", IBM Technical Disclosure Bulletin, vol. 17, No. 5, 1974, p. 1265.
Mee, C. D. et al., "Magnetic Recording", vol. II Computer Data Storage, 1988, p. 206.

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