| 摘要 |
PROBLEM TO BE SOLVED: To prevent the occurrence of phase deviation in phase error information outputted from a phase comparator even when a clock frequency becomes high. SOLUTION: Phase error information PDO outputted from a phase comparator is made a ternary signal of a first value (H), a second value (L), and a third value (Hi-Z), and when signals of the first value and the third value are outputted, the signals of the first value and the third value are continuously outputted. Thereby, even when a clock frequency is high, phase deviation caused by waveform distortion of outputted phase error information PDO is prevented. |
