Compensated clamping circuit in a video signal peaking system

Details Compensated clamping circuit in a video signal peaking system Compensated clamping circuit in a video signal peaking system

H - Electricity

04

N

350/83

H04N 5/58 (2006.01) H04N 5/16 (2006.01) H04N 5/205 (2006.01)

Patent

CA 1179053

RCA 77,249 ABSTRACT OF THE DISCLOSURE A television receiver includes means for generating a peaking component which is combined with a video signal to produce a peaked video signal, and a control circuit responsive to the peaked video signal during prescribed control intervals for automatically controlling a reference level of the video signal. The peaking component is attenuated during the control intervals to prevent the control network from responding to spurious signals including noise, which would otherwise be enhanced by the peaking generator and distort an output control voltage from the control circuit. In a system wherein the control circuit is arranged in a feedback loop with a peaking generator comprising a delay line, such attenuation also serves to stabilize the feedback control loop against oscillation.

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