Patent ID: 6665246
Filing Date: 2003-12-16
Classification: G11B,H03L

Abstract:
An optical disk apparatus for use with a recordable optical disk, comprising:a clock signal generator configured to generate standard clock signals for timing data recording such that a location of a data recording restart following an interruption of recording on said optical disk coincides precisely with that of an end of a previous recording, wherein: said clock signal generator comprises a voltage control oscillator for generating and then outputting a clock signal having a frequency corresponding to an input control voltage, a variable divider for frequency dividing said clock signal output from said voltage control oscillator with a dividing ratio that is variable depending on an input control voltage, a fixed divider for frequency dividing a standard clock signal having a predetermined frequency with a predetermined dividing ratio, a frequency and phase detector for comparing both frequency and phase of a first signal generated by being frequency divided by said fixed divider and a second signal generated by being frequency divided by said variable divider, and then outputting a control voltage corresponding to comparison results; and a dividing ratio controller for comparing both frequency and phase of a frame synch signal, provided for each frame of data on said optical disk and acquired during a playback period of recorded data, and a clock signal output from said voltage control oscillator, and subsequently controlling said variable divider to have a dividing ratio that is variable depending on comparison results.