| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and an arrangement for a digital servo system with moving average filters (Amovavf 1, Amovavf 2), which are used as input filters for a digital signal processor of the servo system to shorten processing delay, which improve the stability of a control loop and/or allow a fast servo signal processing, which improve the overall servo control performance. SOLUTION: The input filter provides average values of samples provided from an analog digital converter (ADC) at a frequency corresponding to a sample frequency (fADC) of the analog digital converter (ADC) and has an adjustable filter length (m), which is determined according to quality of detector signals indicating a deviation from a target of a servo means of the servo system. The digital servo system is applicable to a fast digital servo system of an optical disk drive. COPYRIGHT: (C)2007,JPO&INPIT
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