| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a clock regenerating device which regenerates a clock of stable frequency by suppressing jitters, the frequency converging in a short time even having a large deviation from a target frequency. <P>SOLUTION: The clock regenerating device includes: a means of calculating the difference between the amount of data stored in a buffer and a target value of the amount of data stored in the buffer, and controlling a frequency-variable oscillation means based upon the sum of a control integral value obtained by multiplying an integral value of the difference by an integral coefficient, a control differential value obtained by multiplying a differential value of the difference by a differential coefficient, and a control proportional value obtained by multiplying the difference by a proportional coefficient; a means of determining whether the regenerated clock frequency has converged based upon a threshold; and a means of varying the proportional coefficient and differential coefficient to smaller values when it is determined that the regenerated clock frequency has converged. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
