Automatic gain control device for use in an optical memory devic

Details Automatic gain control device for use in an optical memory devic Automatic gain control device for use in an optical memory devic

1989-01-19

1990-03-20

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including gain control means

330281, H03G 310

Patent

active

049104799

ABSTRACT:
An automatic gain control device for use in an optical memory device has a circuit for producing an amplification control signal which is fed back to a gain control amplifier through a sample-hold circuit. A pulse train detection circuit is provided for detecting the pulse train indicating that the data stored are a on the optical memory device is being playedback. When the pulse train is detected, the sample-hold circuit is made inactive so that the amplification control signal is directly fed back to the gain control amplifier, and when the pulse train ends, the sample-hold circuit is made active to hold the amplification control signal obtained at the end of the pulse train and to produce the amplification control signal held in the sample-hold circuit.

REFERENCES:
patent: 3770984 (1973-11-01), Connor et al.
patent: 4292598 (1981-09-01), Yasumura

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