Colour signal separation circuit for recovering the two colour- subcarrier-frequency colour signal components, comprising an arrangement for setting the amplitude of the colour synchronisation signal

摘要

A circuit arrangement for setting the amplitude of the colour synchronisation signal in a PAL decoder. The demodulated U and V signals are applied to a phase comparator, the output voltage of which is used for controlling the gain of an amplifier connected in the delayed branch of the decoder. ……