| 摘要 |
A phase adjusting circuit (128) detects an amount of phase shift of a reproduction signal RFn sampled in synchronization with clock CLKn-1 from a waveform equalizing circuit (108), and corrects clock CLKn-1 in accordance with the amount of phase shift to produce a corrected clock RCLKn. A clock setting circuit (127) arithmetically determines a moving average of the clock CLKn-1 and the corrected clock RCLKn to produce a clock CLKn used for sampling reproduction signal RFn. The clock setting circuit (127) arithmetically determines the average of n phases of n clocks CLKn, and sets the clock having the average phase as the reproduction clock. Consequently, it is possible to produce the clock allowing accurate sampling of the reproduction signal reproduced from the optical disk. |
