| 摘要 |
<p>A write-side PLL circuit generates a write clock for writing a video signal in a line memory. A read-side PLL circuit generates a read clock for reading the video signal stored in the line memory. An inner pincushion distortion correcting voltage generating circuit modulates the correction waveform of a horizontal rate with the correction waveform of a vertical rate so as to generate an inner pincushion distortion waveform and adds a dc component correcting pulse to the waveform so as to output the waveform as an inner pincushion distortion correcting voltage. A capacitive-coupling circuit superimposes the inner pincushion distortion correcting voltage on the output voltage of a loop filter of the read-side PLL circuit so as to supply the voltage as a control signal to a VCO.</p> |
