| 摘要 |
A read channel circuit of an optical disk reproducing apparatus is adapted to provide stability in servo control and reduce power consumption by revising the offset component of the circuit components after application of reference signals and then the offset component caused by pit depth resulting from signals read out in reproducing a data from an optical disk. The read channel circuit includes: a data converting section for amplifying signals input via different channels and converting them to digital data. A data reproducing section is provided for summing and waveform-equalizing the digital signals, detecting the phase difference between the waveform-equalized signals and reference sampling points, and generating a sampling clock frequency which is provided to the data converting section for compensating for the phase difference. A servo error signal detecting signal is provided for delaying the signals input from the data converting section by phases specified by the offset revision control signal and the pit depth revision control signal, summing the delayed signals into a plurality of signals, and generating the tracking error signals based on the comparison of phase differences between the summed signals.
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