| 摘要 |
PROBLEM TO BE SOLVED: To extremely reduce the generation quantity of jitter as a result by keeping the operation of a voltage-controlled oscillator stable even though spiking noise takes place due to the operation of a phase frequency comparator or a frequency divider in an oscillation circuit using a phase locked loop. SOLUTION: A delay circuit 4 is inserted between an output of the voltage- controlled oscillator 3 and an input of the frequency divider 5, and the delay quantity of the delay circuit 4 is adjusted so that the leading edge and the trailing edge of a clock signal S6 to be returned to the phase frequency comparator 1 from the frequency divider 5 can be separated the most dissociation from the leading and trailing edges of all clock signals existing inside the voltage- controlled oscillator 3. |
