Voltage controlled comb filter.

摘要

A voltage controlled comb filter (14) comprises a 1 H delay circuit (17), an inverting circuit (17), and a mixing (R10) circuit. A playback carrier chrominance signal is delayed by the delay circuit for 1 H period and is inverted by the inverting circuit. The playback and delayed playback carrier chrominance signals are inputted to the mixing circuit (R10) which mixes these signals in proportion variable in accordance with the degree of a line correlation error signal. Therefore, there is no switching noise inherent in the conventional comb filter having a switching circuit used in a video tape recorder.