METHOD FOR CLOCK REPRODUCTION AND DEVICE THEREFOR

摘要

PURPOSE:To shorten a time until a reproducing clock is stabilized by comparing the value of a content register with that of a threshold value register, increasing the oscillation frequency of an oscillation circuit when the value of the content register is larger than that of the threshold value register, and decreasing it when the former is smaller than the latter. CONSTITUTION:The value of the threshold value register 23 is transferred to the content register 22 of FIFO memory 21 by a reset signal. A comparator 24 compares the value of the register 22 with that of the register 23. A frequency control circuit 25 increases the oscillation frequency of a frequency variable oscillation circuit 26 when the value of the register 22 is larger than that of the register 23, and decreases it when the former is smaller than the latter.