| 摘要 |
PURPOSE:To suppress the increase of pin number due to large scale integration by providing a switch between an output of a chroma demodulation output circuit and the 1st output terminal of the integrated circuit and connecting a luminance adjusting input and a luminance adjusting variable resistor to the 1st output terminal. CONSTITUTION:A switch 7 is turned off during the blanking period, the luminance adjusting variable resistor 4 and the luminance adjusting input 5 are connected to the 1st output terminal 11 so as to attain luminance adjustment. Then the switch 7 is turned on during the scanning period and since the impedance of the input 5 and the variable resistor 4 is sufficiently larger than the output impedance of the chroma demodulation output circuit 8, a chroma demodulation signal is outputted from the terminal 11. Thus, the increase of pin number due to large scale integration is suppressed.
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