| 摘要 |
PROBLEM TO BE SOLVED: To provide a PLL circuit capable of accurately matching the phase by pulling in the frequency in a short time. SOLUTION: The PLL circuit comprises a voltage-controlled oscillator VOC, and a phase detector for detecting the phase error of an input signal, thereby controlling the oscillation of the VCO based on the output of the phase detector. In this PLL circuit, as the clocks output from the VCO (105), a plurality of clocks having different phases from each other are formed, and the clock of the phase closest to the phase point detected by a phase comparator (103) is selected and is outputted. COPYRIGHT: (C)2003,JPO
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