Synch responsive agc utilizing A-D converter

Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry

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Details

341139, H04N 552

Patent

active

051574934

ABSTRACT:
Disclosed is an apparatus for the reception of video signals with a variable gain amplifier to hold the video signal between pre-determined limits. To control the gain of the amplifier, there is provision for a circuit that keeps the amplitude of the line synchronization pulse substantially constant. This circuit has, for example, an analog/digital converter with an output, one bit of which represents the sign of the difference between the line synchronization pulse and its prescribed value.

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