| 摘要 |
A disk reproducing apparatus includes a variable gain amplifier (VCA) ( 32 ), and the VCA applies a radial push-pull signal including an address signal and an FCM leakage-in signal to a switch ( 38 ). The switch outputs only the address signal to a peak-hold circuit ( 40 ) on the basis of an FCM mask signal from a mask signal generation circuit ( 36 ). The peak-hold circuit generates a peak-hold signal of the address signal so as to be output to a DSP ( 30 ), and the DSP controls a gain of the VCA on the basis of the peak-hold signal. Then, the radial push-pull signal in which the gain is controlled on the basis of the address signal is applied to an address detection circuit ( 42 ), and the address signal is detected therein.
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