PAL chroma signal demodulating apparatus

A signal demodulator apparatus, comprising;

• an input terminal for inputting a phase alternation line (PAL) chroma signal;
• delaying means connected to said input terminal, for outputting a first delay signal obtained by delaying the PAL chroma signal by a time corresponding to one horizontal line;
• a phase corrector responsive to the first delay signal outputted by said delaying means, for correcting phase of the first delay signal on the basis of a phase difference detection signal and outputting the first phase-corrected delay signal as a second delay signal;
• a phase difference detector for detecting a phase difference between the second delay signal outputted by said phase corrector and the PAL chroma signal inputted through said input terminal and for outputting the phase difference detection signal to said phase corrector to correct the phase difference to a time corresponding to one horizontal line;
• a multiplier responsive to the second delay signal outputted by said phase corrector and the PAL chroma signal inputted through said input terminal, for obtaining and outputting the phase difference between the second delay signal and the PAL chroma signal;
• polarity reversing means for reversing polarity of the phase difference signal outputted by said multiplier for each predetermined periodic time;
• and
• a filter responsive to the phase difference signal outputted by said multiplier, for eliminating noise components for the phase difference signal to generate and output a correction signal to said phase corrector.