Recording of digital signals on d.c.-erased magnetic tape

Details Recording of digital signals on d.c.-erased magnetic tape Recording of digital signals on d.c.-erased magnetic tape

1989-07-27

1991-10-15

Heinz, A. J.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of biasing or erasing

360 60, 360 46, 360 67, G11B 503, G11B 1504, G11B 509

Patent

active

050579487

ABSTRACT:
In order to avoid distortion of digital signals recorded on a magnetic tape following erasure of the recording tracks by a d.c. erase head, a compensating magnetic bias field opposed to the remanent erase field is superimposed upon the field recorded by the digital signals. This may be produced by superimposing a direct current on the recording current furnished to the recording head, either directly or by superimposing a bias voltage at the input of the recording amplifier. A separate magnetic head following the erase head and preceding the recording head may also be used to produce the compensating bias field.

REFERENCES:
patent: 3369081 (1968-02-01), Atsumi
patent: 3611329 (1971-10-01), Lee
patent: 4713700 (1987-12-01), Kuwahara et al.
patent: 4769724 (1988-09-01), Kusunoki et al.

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