Low frequency component restoration circuit for restoring and co

Dynamic magnetic information storage or retrieval – General processing of a digital signal – Head amplifier circuit

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Details

360 67, G11B 509, G11B 502

Patent

active

051345285

ABSTRACT:
A low frequency component restoration circuit of a digital VTR restores cut off low frequency component of a reproduced digital signal. The low frequency component restoration circuit includes a first low frequency compensation path for performing feed-back low frequency compensation to an input digital signal and a second low frequency compensation path for performing low frequency compensation to the input digital signal, and wherein an output of the first low frequency compensation path is selectively supplied when a normal reproduction mode is selected where the amplitude of the input digital signal wanders slightly, and an output of the second low frequency compensation path is selectively supplied when a special reproduction mode is selected where an amplitude of the input digital signal greatly wanders in a short time period.

REFERENCES:
patent: 3264569 (1966-08-01), Lefferts
patent: 4692914 (1987-09-01), Yasumura et al.
patent: 4786986 (1988-11-01), Yamanushi et al.
patent: 4942485 (1990-07-01), Umehara et al.
patent: 4991034 (1991-02-01), Sato

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