Patent ID: 6961293
Filing Date: 2005-11-01
Classification: G11B

Abstract:
1. A method for adjusting signals of a compact disk (CD) drive and synchronizing a wobble clock with a writing clock, the method comprising: using a motor of the CD drive to force a CD to rotate, the CD having a data track for storing data and a wobble track for recording signals, wherein when the motor forces the CD to rotate, the CD drive generates the wobble clock according to the wobble track, and the CD drive is capable of writing data on the data track according to the writing clock; adjusting a frequency of the writing clock to synchronize the writing clock with the wobble clock; generating a system clock having a plurality of periods with a same interval; generating the writing clock according to the system clock, a ratio of a period of the writing clock to a period of the system clock being equal to a phase-locked rate, wherein the frequency of the writing clock is adjusted by adjusting the phase-locked rate; generating a frame clock, which synchronizes with the writing clock; and generating a harmony signal, which synchronizes with the wobble clock; wherein the phase-locked rate is adjusted according to a phase difference between the frame clock and the harmony signal.