Optical disk device

摘要

An optical disc device includes an optical pickup that causes a laser beam to be incident on an optical disc and detects a reflected beam, an A/D converter that converts into a digital signal a plurality of analog signals obtained from the reflected beam detected by the optical pickup, an error signal generating circuit that generates a servo signal for the optical pickup based on the digital signal converted by the A/D converter, a low-pass filter that removes noise of a specific band included in the servo error signal generated by the error signal generating circuit, a main processor that switches a noise removal band of the low-pass filter based on states of the optical disc, and an actuator that performs servo control for the optical pickup based on the servo error signal from which the noise has been removed by the low-pass filter.

主权项

1. An optical disc device comprising:
an optical pickup that causes a laser beam to be incident on an optical disc and detects a reflected beam; A/D converting means for converting into a digital signal a plurality of analog signals obtained from the reflected beam detected b the optical pickup; servo error signal generating means for generating a servo signal for the optical pickup based on the digital signal converted by the A/D converting means; noise removing means for removing noise of a specific band included in the servo error signal generated by the servo error signal generating means; noise removal band switching means for switching a noise removal band of the noise removing means based on states of the optical disc; and servo controlling means for performing servo control for the optical pickup based on the servo error signal from which the noise has been removed by the noise removing means, wherein the states of the optical disc include states during reading of the optical disc, writing of the optical disc, switching from reading to writing, and switching from writing to reading.