Magnetic recording and reproducing device

Details Magnetic recording and reproducing device Magnetic recording and reproducing device

1984-06-27

1986-09-09

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of biasing or erasing

360 25, G11B 503, G11B 502

Patent

active

046112537

ABSTRACT:
A magnetic recording and reproducing device in which an optimum recording bias current, optimum recording level and optimum recording equalization characteristic are automatically set wherein a desired MOL balance dependent upon a difference of a magnetic characteristic is achieved. A recording bias is varied at predetermined time intervals. A variable low-frequency oscillator supplies a low-frequency signal upon which the recording bias current is superposed for recording upon a magnetic medium. The maximum value of a reproduced signal of the recorded signal is detected and the recording bias current set to supply an optimum recording bias current corresponding to the maximum value of the reproduced signal. The low-frequency oscillator is set to oscillate at an optimum frequency dependent upon at least one of the type of the magnetic medium and a magnetic characteristic thereof.

REFERENCES:
patent: 4297730 (1981-10-01), Kadowaki et al.
patent: 4422109 (1983-12-01), Sampei et al.

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