Apparatus for automatically optimizing magnetic recording and pl

Details Apparatus for automatically optimizing magnetic recording and pl Apparatus for automatically optimizing magnetic recording and pl

1989-08-07

1992-03-31

Severin, David J.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of the amplifier

360 31, G11B 502

Patent

active

051013096

ABSTRACT:
While prior art apparatus for magnetic recording and playback (VTRs) were unable to perform magnetic recording of an FM signal with an optimum recording current responding to change of the optimum recording current dependent on kinds of magnetic tapes used and wear of heads, the magnetic recording of an FM signal with the optimum recording current at all times has been made possible by having a recorded signal along a track of a magnetic tape read by a level servo head scanning the track following the signal recording and having the recording current controlled to be optimized by use of a recording current controlling device based on the playback signal output from the level servo head. As a result, improvement of the S/N ratio and automatic adjustment of the recording current can be achieved. Further, by means of a head drive unit, the position of the level servo head is finely adjusted so that the control for optimization of the recording current is performed accurately.

REFERENCES:
patent: 4151569 (1979-04-01), Hathaway
patent: 4151570 (1979-04-01), Ravizza et al.
patent: 4337492 (1982-06-01), Brookhart et al.
patent: 4831466 (1989-03-01), Murakami et al.
patent: 4882635 (1989-11-01), Sanai

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