| 摘要 |
PURPOSE:To improve the reliability of the circuit operation by making an oscillating frequency of a phase locked loop stable so as to give a reference clock not including jitter to each circuit section. CONSTITUTION:A voltage fluctuation of an output PD of a phase comparator 12 is unsharpened by decreasing a drive capability of an output section of the phase comparator 12 of a phase locked loop 10 generating a reference clock BCK after the reference clock BCK is synchronized with a transmission signal DIN from a sender side equipment and jitter included in the output PD is sufficiently absorbed by a low pass filter 13 thereby slowing down the fluctuation of the oscillating frequency of a voltage controlled oscillator 14 against a change in the output PD of the phase comparator 12. |
