CLOCK REPRODUCTING DEVICE

摘要

PROBLEM TO BE SOLVED: To reduce the frequency jitter of a reproduced clock generated by the fluctuation of a voltage control signal inputted to a voltage control oscillator when a clock reproduction mode is switched. SOLUTION: When a clock reproduction mode informing signal 117 is an SRTS clock reproduction mode, a selector 134 outputs an intermediate value signal 132 to an adaptive clock reproduction low pass filter 135. The adaptive clock reproduction low pass filter 135 sets an adaptive clock reproduction voltage control signal 116 to a middle signal level between a high level and a low level. Thus, the fluctuation amount of the voltage control signal 118 when the clock reproduction mode is switched from the SRTS clock reproduction mode to an adaptive clock reproduction mode is reduced.