A method and circuit arrangement for recovering the traeger frequency from a modulated electrical input signal

摘要

P the invention relates to a method for regeneration of the modulation carrier wave of a signal comprising the lines symmetric with respect to this carrier. / p & & p & is made to control the frequency of a local oscillator by a phase discriminator receiving two signals images of the starting signal, the spectrum of one of these signals being turned relative to that of the starting signal, and the difference of frequencies between these two signals images being double that between the local carrier and the carrier of the starting signal. / p & & p & a synchronous demodulation of a signal of the television. / p