首页>
外国专利>
DEVICE OF COMPENSATING FOR DISK ECCENTRICITY IN AN OPTICAL DISK SERVO SYSTEM AND A METHOD THEREOF, PARTICULARLY CORRELATED TO PERFORMING AN EXACT ECCENTRICITY COMPENSATION BY REPLACING ECCENTRIC DATA WITH MAPPED REFERENCE SINUSOID WAVE
DEVICE OF COMPENSATING FOR DISK ECCENTRICITY IN AN OPTICAL DISK SERVO SYSTEM AND A METHOD THEREOF, PARTICULARLY CORRELATED TO PERFORMING AN EXACT ECCENTRICITY COMPENSATION BY REPLACING ECCENTRIC DATA WITH MAPPED REFERENCE SINUSOID WAVE
PURPOSE: A device of compensating for disk eccentricity in an optical disk servo system and a method thereof are provided to replace inputted eccentric data with data mapped with a reference sinusoid wave, thereby detecting an exact eccentric signal and realizing a stable disk servo. CONSTITUTION: A system turns on a focus servo and a tracking servo, and generates focus and tracking error signals(410). The system extracts eccentric components of one period included in the tracking error signal through a feed-forward control module, and stores the extracted components(420,422), then reads eccentric data to measure a frequency, a gain, and a phase(430). If the frequency is detected(432), the system stores a frequency value in a specific register(440). If the gain is detected(442), the system stores a gain value(450). If the phase is detected(452), the system stores a phase value(460). Based on the stored frequency, gain, and phase values, the system maps an original eccentric signal with a reference sinusoid wave(470). The system replaces the original eccentric data with data corresponding to the mapped sinusoid wave(480).
展开▼
