Color_TV_chroma_demodulator_with_tint_control_Circuit Diagram World 
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2014-11-28 21:22  
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Color TV chroma demodulator with tint control. The color demodulators consist of two sets of balanced detectors that receive their reference subcarrier from the internal demodulator drive amplifiers. The chroma signal input is applied to pin 14. The chroma signal differentially drives the demodulators. The demodulation components are matrixed and DC-shifted in voltage to give R-Y, G-Y and B-Y color difference compo-nents with close DC balance and proper amplitude ratios. When the zener reference element is not used the power supply should be maintained at +11.2 volts (courtesy GTE Sylvania Incorporated).