| 摘要 |
An optical disc reproducing apparatus capable of detecting data with a high precision without being affected by a low frequency component of a modulation code, comprising a high-pass filter for cutting off the low frequency component contained in the reproduced signal by a predetermined cut-off frequency, an envelope detecting means for detecting the envelope of said reproduced signal, a digitizing means for digitizing said reproduced signal, a gain controlling means for controlling the gain of said digital signal, a low-pass filter for cutting off the high frequency component contained in said gain-controlled digital signal by said cut-off frequency and generating a feedback signal, and an adding means for adding said reproduced signal and said feedback signal and outputting the same as an added signal to said digitizing means.
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