Color signal processing circuit of color television receiver

Details Color signal processing circuit of color television receiver Color signal processing circuit of color television receiver

1981-10-02

1983-11-15

Martin, John C.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 27, H04N 949, H04N 9535

Patent

active

044159196

ABSTRACT:
In a color signal processing circuit having first and second chroma amplifiers, a burst amplifier for extracting a color burst signal from an output signal of the first chroma amplifier, a synchronous color killer detector for detecting the color burst signal and for turning on/off the second chroma amplifier in accordance with the amplitude of the color burst signal and a peak detection type automatic chroma control circuit for controlling the gain of the first chroma amplifier in accordance with the amplitude of the color burst signal, a switching circuit is provided for operating the automatic chroma control circuit when the output voltage of the color killer detector reaches a second level which is higher than a first level at which the second chroma amplifier is turned on.

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