Electronic gain and noise control for recording of analog inform

Details Electronic gain and noise control for recording of analog inform Electronic gain and noise control for recording of analog inform

1981-07-29

1982-07-27

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

Head

Coil

360 26, 360 55, 360124, G11B 520, G11B 502

Patent

active

043420591

ABSTRACT:
Audio signals with opposite relative phases are recorded on two tracks. A dual track head reproduces the signals from the two tracks and introduces another phase reversal of one signal relative to the other. Noise which was not present in the record circuit, but enters the system at the playback head, is out of phase in the signals which the playback head applies to the playback circuit. Combining the out-of-phase noise components of the two signals substantially cancels the noise.

REFERENCES:
patent: 2689274 (1954-09-01), Saeger
patent: 3832044 (1974-08-01), Deeran
patent: 3856387 (1974-12-01), Wray et al.
patent: 3959824 (1976-05-01), Ohi et al.
patent: 4008493 (1977-02-01), Pizzuto
patent: 4157574 (1979-06-01), Stamer
"The Hi Fi Book", published by Stereo Components Systems Inc., p. 125, 1979.
"Signetics Analog Data Manual"-Signetics Corp., Sunnyvale, Calif., pp. 482, 483 and 794-805.

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