Automatic signal compensation recording and reproducing apparatu

Details Automatic signal compensation recording and reproducing apparatu Automatic signal compensation recording and reproducing apparatu

1980-04-30

1982-04-20

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of equalizing

360 68, G11B 545, G11B 502

Patent

active

043262244

ABSTRACT:
A magnetic recording and reproducing apparatus for recording a signal on and reproducing it from a magnetic tape comprises an automatic A.C. bias adjusting device for increasing an A.C. bias current to be superimposed during recording of the signal at a predetermined rate and differentiating the reproduced signal by time to automatically establish an optimum A.C. bias, and a record compensation device for recording and reproducing an adjusting square wave, separating a fundamental frequency component of the square wave from a harmonic component, comprising both components to determine a ratio of them and adjusting a record compensation frequency characteristic in accordance with the ratio.

REFERENCES:
patent: 2791640 (1957-05-01), Wolfe
patent: 4011585 (1977-03-01), Sunaga
patent: 4092678 (1978-05-01), Nishikawa

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