Patent ID: 6205095
Filing Date: 2001-03-20
Classification: G11B

Abstract:
An optical disk device comprising:optical means for extracting information stored on a disk;control means for controlling said optical means;signal process means for optimally converting a regenerated signal extracted by said optical means into a binary signal; andreference clock generation means for generating a reference clock substantially equal to a basic transfer speed of the regenerated signal from a fixed clock;said reference clock generation means comprising:a first divider for dividing the fixed clock;a second divider for dividing the reference clock;a phase comparator for detecting a phase error between a division clock output by said first divider and a division clock output by said second divider;a voltage/current control oscillator for oscillation at a frequency depending on the phase error output by said phase comparator; andsetting means for setting a central oscillation frequency or a gain of said voltage/current control oscillator;whereby characteristics of said signal process means are optimally varied according to an oscillation frequency of said voltage/current control oscillator.