| 摘要 |
PURPOSE:To suppress a jitter component while keeping the following capacity to the low frequency component of input data by providing a low pass filter used for correction due to a correction coefficient of a coefficient multiplier and performing correction by the output of this filter also. CONSTITUTION:The output of a low pass filter 7 is added to the output of a coefficient multiplier 3. Correction by the output of the filter 7 is equivalent to the practical change of a coefficient K due to the change of input data. Thus, the coefficient concerning intervals calculated by input data is increased with respect to the low frequency component of input data, and the coefficient concerning a phase position Pi is increased with respect to the high frequency component like jitter. When data is fetched into the filter 7, the variation of the low frequency component due to wow and flutter or the like is equalized approximately in a one-clock period. |
