Dynamic magnetic information storage or retrieval – General recording or reproducing – Specifics of equalizing
Patent
1982-06-01
1983-12-20
Canney, Vincent P.
Dynamic magnetic information storage or retrieval
General recording or reproducing
Specifics of equalizing
360 66, G11B 545, G11B 547
Patent
active
044221088
ABSTRACT:
A tape recorder comprises, in its signal recording path, a variable gain circuit compensating the sound recording sensitivity of a magnetic tape and two variable equalizers compensating the frequency characteristic of the magnetic tape in the intermediate and high frequency ranges respectively. Reference signals at three different frequencies are successively supplied to the signal recording path to be recorded on the magnetic tape, and the signals of different reference frequencies are successively reproduced from the magnetic tape to be then arithmetically processed so as to optimize the gain of the variable gain circuit and the degree of frequency characteristic compensation by the first and second variable equalizers.
REFERENCES:
patent: 2791640 (1957-05-01), Wolfe
Fujita Naoya
Higuchi Shigemitsu
Sampei Tohru
Tomatsuri Kouichi
Yamada Masamichi
Canney Vincent P.
Hitachi , Ltd.
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