Video sync signal slicing using variable gain control

摘要

A video sync slicing circuit is disclosed that employs an adjustable gain control (AGC) amplifier and circuitry that adjusts a gain of the AGC amplifier such that a blanking level of the video signal at an output of the AGC amplifier equals a blanking reference voltage. The slicing circuit includes a circuit that triggers a composite sync signal when a sync pulse of the video signal equals the fifty percent slicing level.