Signal processing circuit

Details Signal processing circuit Signal processing circuit

1982-06-03

1985-02-19

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of equalizing

360 67, G11B 545, G11B 502

Patent

active

045009325

ABSTRACT:
A signal processing circuit which can be used, for example, as a playback equalizer is formed in a semiconductor integrated circuit with a main path and a side path arrayed between the input terminal and the output terminal of the integrated circuit. The signals at the ends of the main and side paths are added together to obtain the output signal for the signal processor. A filter in the main path determines its frequency characteristics. On the other hand, a variable gain control means having substantially flat frequency characteristics is inserted in the side path and its gain can be changed in response to control data to control the output signal of the signal processor.

REFERENCES:
patent: 3336540 (1967-08-01), Kwartiroff et al.
patent: 3748602 (1973-07-01), Delfrate et al.
patent: 3794935 (1974-02-01), Tsuchiya et al.
patent: 3940709 (1976-02-01), Heaslett
patent: 4004253 (1977-01-01), Takasaki et al.
patent: 4110798 (1978-08-01), Miller et al.
patent: 4371901 (1983-02-01), Shah
patent: 4389683 (1983-06-01), Lelandais
patent: 4405954 (1983-09-01), Guisinger
"A Method to Realize a Variable Equalizer", by K. Endo et al., Electronics & Communications in Japan, vol. 52-A, #4, 1929.

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