Magnetic recording system

Details Magnetic recording system Magnetic recording system

1980-08-12

1983-06-28

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

Converting an analog signal to digital form for recording;...

360 29, 360 40, G11B 500, G11B 502, G11B 509

Patent

active

043909078

ABSTRACT:
A carrier wave at a frequency higher than the frequency of an input signal to be recorded is pulse width modulated with the input signal at the pulse width modulator, and the modulated signal thus obtained is supplied to a vertical magnetization recording head. The vertical magnetization recording head is held in contact with a magnetic tape having a rectangular hysteresis characteristic, and the modulated signal is recorded by vertical magnetization recording on the magnetic tape. The signal recorded by the vertical magnetization recording is reproduced with a reproducing head having a high sensitivity reproducing characteristic with respect to the input signal component of the pulse width modulation signal recorded on the recording medium and a low sensitivity characteristic with respect to the carrier wave component of the modulation signal.

REFERENCES:
patent: 3012234 (1961-12-01), Burns
patent: 3049698 (1962-08-01), Thompson et al.
patent: 3230517 (1966-01-01), Supernowicz
patent: 3405232 (1968-10-01), Morrow et al.
patent: 3855616 (1974-12-01), Schneider
patent: 4149204 (1979-04-01), Marino et al.
patent: 4251842 (1981-02-01), Iwasaki et al.
Magnetic Tape Instrumentation by G. L. Davis, McGraw-Hill Book Co., .COPYRGT.1961, p. 15.

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