RECORD REPRODUCING DEVICE

摘要

PROBLEM TO BE SOLVED: To detect a wobbling signal with high precision even when a noise component is superimposed on the wobbling signal in a record reproducing device. SOLUTION: The prerecording information signal SPPX amplified by an X-time amplifier 33 is applied to a limiter 101 by a wobbling signal extracting section 22, and the noise component of a prepit signal is removed based on an upper level limit signal SUL and a lower level limit signal SWL from a limit level generator 102. The signal SPPX is made to pass an LPF(low pass filter) 104, the SL signal passing the LPF is made to pass an HPF(high pass filter) 105, and the SB signal passing the HPF is binarized by a binarizing unit 107 and fed to a servo circuit 15 after the wobbling extraction signal SDTT is extracted from it. The SL signal passing the LPF or the SB signal passing the HPF is selected and adjusted in phase by a phase adjuster 102a, and the limit level signals SWL and SUL are generated by the limit level generator based on the signal SSW adjusted in phase.