Automatic gain controlling circuit for recording and reproducing

Details Automatic gain controlling circuit for recording and reproducing Automatic gain controlling circuit for recording and reproducing

1994-06-02

1995-07-18

Sniezek, Andrew L.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

360 65, 360 68, G11B 509, G11B 5035, G11B 502

Patent

active

054347181

ABSTRACT:
An automatic gain controlling circuit is associated with magnetic heads for recording and reproducing pieces of video data information on a magnetic tape, and an in-phase current component is eliminated from a recording current flowing into one of the magnetic heads through a differential amplification between two input voltage levels produced from the recording current with the in-phase current component so that a gain control voltage signal is free from a relative accuracy between circuit components causative of the in-phase current component.

REFERENCES:
patent: 5101310 (1992-03-01), Brown
patent: 5206738 (1993-04-01), Nishigaki et al.
Patent Abstracts of Japan, vol. 14, No. 168(E-0912) Mar. 30, 1990.
Patent Abstracts of Japan, vol. 15, No. 108 (E-1045) Mar. 14, 1991.
Patent Abstracts of Japan, vol. 16, No. 379 (E-1247) Aug. 13, 1992.
Patent Abstracts of Japan, vol. 6, No. 166 (P-138) (1044) Aug. 31, 1982.

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