PCM signal recording apparatus

Details PCM signal recording apparatus PCM signal recording apparatus

1988-09-23

1990-10-30

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

360 68, G11B 509, G11B 502

Patent

active

049672894

ABSTRACT:
In an apparatus for recording data on a magnetic recording medium by means of a magnetic head, a recording current supplied to such head, for example, from a recording amplifier, is varied in accordance with the recording density of the data being recorded so as to reduce the bit error rate upon playback or reproducing of the recorded data. For each recording density, the recording current supplied to the magnetic head is a predetermined amount greater than the optimal value of the recording current at a Nyquist frequency of the digital data being recorded.

REFERENCES:
patent: 4535371 (1985-08-01), Harr et al.
patent: 4656533 (1987-04-01), Sakai et al.
patent: 4764816 (1988-08-01), Heitmann
patent: 4821125 (1989-04-01), Christensen et al.

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