| 摘要 |
PURPOSE:To prevent the disorder of a waveform in a horizontal and vertical blanking period, by performing waveform shaping as to not only a color signal amplifier but also a B-Y demodulator and an R-Y demodulator. CONSTITUTION:According to fly-back pulses supplied from a fly-back pulse input terminal 9, waveform shaping circuits 8, 10 and 11 shape the waveforms of color signals of an amplifier 2, B-Y demodulator 4 and R-Y demodulator 6 in a horizontal and vertical blanking period. Consequently, the disorder of waveforms in the horizontal and vertical blanking period is prevented. No circuit generating noises exists following the said circuits, and then a signal-to-noise ratio is improved remarkably, so that TV received picture of good quality are obtained. |
