Importance

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Abstract

Device for reducing a jitter in an optical disc, is disclosed, including a DVD formatter for providing a DVD format signal according to a DVD source signal, a pulse width adjuster for separating the DVD format signal from the DVD formatter into signals of frequencies each being a certain times of a basic clock, comparing the signals to a reference voltage, and adjusting a pulse width of each of the signals according to results of the comparisons, a DVD signal extractor for adding the signals each having the pulse width adjusted in the pulse width adjuster in extracting a pulse width adjusted DVD signal, and amplifying the pulse width adjusted DVD signal, and a laser beam recorder for directing a laser beam onto a DVD according to the DVD signal extracted and amplified in the DVD signal extractor to form pits corresponding to the frequency of the certain times in the DVD, and a method for reducing a jitter in an optical disc, whereby facilitating individual adjustments of pulse widths of DVD format signals from the DVD formatter according to a reference voltage from the comparator, allowing elimination of asymmetry that reduces a jitter occurred in molding an optical disc.

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First Claim