Method and apparatus for generating write-in clock in optical-disc etching machine
A technology of optical disc drive and clock, which is applied in the field of fixed angular velocity optical disc drive to generate writing clock by using wobble signal, which can solve the problems affecting the efficiency and stability of burning data in optical disc drive
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[0020] Please refer to FIG. 5 . FIG. 5 is a functional block diagram of the writing clock generator 80 of the fixed angular velocity optical disk drive of the present invention. The present invention utilizes the wobble signal 82 on the disc to generate the write clock 84 . The write clock generator 80 can be divided into several functional blocks, including a reference clock generator 88 for generating a reference clock 86, a counter 90, a digital averager 92 for generating an average, and a plurality of signal frequency generators for changing the frequency of the signal. Frequency dividers (dividers) 94, 96, 98, 100, a plurality of phase comparators 102, 104 for comparing signal phase relationships, low-pass filters 106, voltage-controlled oscillators for generating specific frequency signals according to input voltages (voltage controlled oscillator, VCO) 108, and a control circuit 110 for controlling the operation of the frequency divider 94.
[0021] The working princip...
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