Fast recovery squelch circuit for a video disc player

摘要

A squelch circuit responsive to a squelch signal mutes audio and video circuits in a video disc player, preconditions a video signal correction servo system to the center of its control range and inhibits a defect correction circuit. A squelch memory, set by the simultaneous occurrence of the squelch signal and a loss of carrier signal derived from the output of the player pickup transducer, maintains the muting, preconditioning and inhibiting functions. When the squelch signal terminates the squelch memory is reset upon subsequent termination of the loss of carrier signal whereby the audio and video circuits are immediately unmuted, stabilization is rapidly established by the preconditioned video signal correction servo system and the defect correction circuit is primed.