| 摘要 |
Analog components whose characteristics greatly differ from one another are removed as much as possible from an optical disc drive. Provided are means 38, 39 for changing the sampling frequency of a pulsed read signal to a different frequency, means 40, 41 for changing the modulation clock frequency by the same ratio as the sampling frequency, and means for automatically setting the sampling frequency changing means and the modulation clock changing means based on the channel clock.
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