Signal processing circuit

Details Signal processing circuit Signal processing circuit

H - Electricity

04

N

350/59

H04N 9/12 (2006.01) H04N 9/64 (2006.01)

Patent

CA 1080346

Abstract of the Disclosure In a circuit for processing a chroma signal the chroma signal is applied to a demodulator through a first phase shifter. The burst signal is applied to an automatic phase adjusting circuit including a phase detection circuit and a voltage-controlled oscillator. The output of the phase adjusting circuit is applied to a hue adjusting circuit including a second phase shifter and a mixing circuit con- nected to receive the output of the phase adjusting circuit and the output of the second phase shifter. A control voltage is applied to the mixing circuit for controlling the relative amplitude of the two inputs applied to the mixing circuit. The output of the hue adjusting circuit is applied to the demodulator to act as the subcarrier signal for demodulating the chroma signal.

272030

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