Automatic tape bias adjusting and signal compensation recording

Details Automatic tape bias adjusting and signal compensation recording Automatic tape bias adjusting and signal compensation recording

1978-10-31

1981-01-13

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of biasing or erasing

360 31, G11B 547, G11B 2736

Patent

active

042452651

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: 3564160 (1971-02-01), Temes
patent: 4011585 (1977-03-01), Sunaga
patent: 4038692 (1977-07-01), Umeda et al.
patent: 4092678 (1978-05-01), Nishikawa

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