| 摘要 |
PURPOSE:To reduce the rolling or the skew of a picture by constituting a clock generation circuit and a horizontal deflection circuit in one PLL circuit. CONSTITUTION:A video signal from an input terminal 13 is separated into a luminance signal and a chrominance signal by a comb line filter 14, and further, the chrominance signal is inputted to a digital signal processing circuit through A/D converters 16 respectively, after it is demodulated by a chrominance demodulator 15. A synchronizing system is provided with the clock generation circuit 11, whose input is a horizontal synchronizing signal from a synchronizing separation circuit 22. The clock generation circuit 11 and the horizontal deflection circuit 2, including a horizontal output circuit 7 and a flyback transformer 8, constitute one PLL circuit. |
