| 摘要 |
PROBLEM TO BE SOLVED: To provide a phase locked loop device capable of switching frequency at a high speed in an asynchronous state and reducing spurious radiation in a synchronous state. SOLUTION: This phase locked loop device is provided with a phase comparator 17 that compares the phase of a reference signal fr with the phase of a comparison signal fp and outputs phase difference signals fu, fd and a phase difference information signal frp based on the result of comparison, a control unit 1a that outputs an adjustment signal fcn to adjust a degree of emphasis of the phase difference signals fu, fd based on the phase difference information signal frp and a gain controller 1c that outputs a correction control signal fg resulting from amplifying or attenuating a control signal fc with the adjustment signal fcn. |
