| 摘要 |
PROBLEM TO BE SOLVED: To provide a signal processing circuit and its method for restoring an analog video signal of which the waveform is disturbed. SOLUTION: A correction circuit 22 extracts an odd-order higher harmonic component of an analog video signal inputted from an amplifier circuit 21, delays a signal component less than the essential wave frequency of an input analog video signal and mixed the extracted odd-order higher harmonic component and the delayed signal component less than the essential wave frequency at a prescribed rate to restore the waveform of the input analog video signal. An A/D conversion circuit 23 A/D-converts the restored analog video signal supplied from the circuit 22 by using a clock supplied from a PLL circuit 25. |
