Magnetic recording and reproducing apparatus with individual cor

Details Magnetic recording and reproducing apparatus with individual cor Magnetic recording and reproducing apparatus with individual cor

1991-02-06

1993-11-09

Hajec, Donald T.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Signal switching

358315, G11B 1514, H04N 979

Patent

active

052608433

ABSTRACT:
In a magnetic recording and reproducing apparatus, amplitude errors of recording currents respectively supplied to a plurality of rotary magnetic heads are detected, and, in individual periods of sequential scanning of a magnetic recording medium by the plural rotary magnetic heads, the gain of a variable gain amplifier disposed in a signal recording system sequentially supplying an input video signal to the plural rotary magnetic heads is controlled so as to automatically adjust the value of the recording current supplied to each of the rotary magnetic heads.

REFERENCES:
patent: 3265818 (1966-08-01), Goossen et al.
patent: 3732361 (1973-05-01), Makara
patent: 3852808 (1974-12-01), Sadashige
patent: 4433255 (1984-02-01), Taguchi et al.
patent: 4549229 (1985-10-01), Nakano et al.
patent: 4700239 (1987-10-01), Yoshinaka et al.
patent: 4713700 (1987-12-01), Kawahara et al.
patent: 4757392 (1988-07-01), Awamoto et al.
Patent Abstracts of Japan, vol. 11, No. 110 (E-496), Apr. 7, 1987 (for Japanese Kokai 61-256890).

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