| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce influence of noise generated in an RF signal when generating an instruction signal which instructs a timing of sample-holding a tracking error signal, based on the RF signal. <P>SOLUTION: A determination part 63 of an optical drive device includes: a recording determination signal generation part 74 which generates a recording determination signal NR which shows whether a recording area or a non-recording area is irradiated with a light beam for recording layer, based on the RF signal; an instruction signal generation part 75 which generates an instruction signal SHT to indicate a timing of sampling a tracking error signal TE<SB>S</SB>based on the RF signal and the recording determination signal NR; and a sample-hold circuit 73 which sample-holds the tracking error signal TE<SB>S</SB>according to the instruction signal SHT. <P>COPYRIGHT: (C)2011,JPO&INPIT |
