Patent ID: 8437231

Claim:
A servo control device comprising: a plurality of reproduction channels configured to reproduce information of a recording medium; a plurality of analog/digital converters configured to perform sampling and quantization of a plurality of input signals of the plurality of reproduction channels, correspondingly; a servo error detecting circuit configured to execute predetermined processing for the plurality of input signals digitized by the A/D converters to generate a servo error signal; a servo signal processing device configured to execute predetermined processing for the servo error signal to generate a control signal for servo system control; and a sampling frequency converter configured to convert a sampling frequency between the servo error detecting circuit and the servo signal processing device, wherein a first clock is included as a sampling clock of the A/D converters and a processing clock of the servo error detecting circuit, a second clock is included as a processing clock of the servo signal processing device, and the sampling frequency converter converts the sampling frequency by processing the servo error signal by the servo error detecting circuit in synchronization with the first clock and processing the signal processed in synchronization with the first clock in synchronization with the second clock.