Abstract: A noise suppression circuit for suppressing or cancelling noise pulses in a composite video signal coupled to television receiver synchronizing pulse separator and automatic gain control circuits is shown. Noise pulses in the video signal exceeding the amplitude of the synchronizing pulses are detected. The detected noise pulses are direct current coupled to the synchronizing pulse separator circuit and alternating current coupled to the automatic gain control circuit to inhibit hang-up of the automatic gain control system. The reference level for detecting the noise pulses is gated to inhibit detection of synchronizing pulses. The noise detecting reference level is also derived from the automatic gain control reference level.

Abstract: A self-regulating horizontal deflection system with feedback indicative of the magnitude of an unregulated voltage source and of load variations to pulse width modulate the output of the horizontal oscillator is shown. Separate turn-on and turn-off drivers are transformer coupled by separate primary windings to the horizontal output transistor to optimize the driver stage and conserve power.