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AssigneeZhejiang University
InventorsZhiwei Xu, Jiangbo Chen, Jiabing Liu, Hui Nie, Zhihao Lv, Chunyi Song
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Disclosed is a fast lock phase-locked loop circuit for avoiding cycle slip, which belongs to the technical field of integrated circuits. The fast lock phase-locked loop circuit includes a phase frequency detector, a charge pump, an intermediate stage circuit, a loop filter, a voltage-controlled oscillator and a frequency divider. The phase frequency detector, the charge pump, the intermediate stage circuit, the loop filter and the voltage-controlled oscillator are connected in sequence; an output OUT end of the voltage-controlled oscillator is connected with an input IN end of frequency divider, and an output OUT end of the frequency divider is connected with an input IN end of the phase frequency detector to form a feedback path. The output clock frequency of the VCO and the expected frequency, i.e., the reference clock frequency and the feedback clock frequency, are prevented from being too close when the loop is started.
A fast lock phase-locked loop circuit for avoiding cycle slip, comprising a phase frequency detector, a charge pump, an intermediate stage circuit, a loop filter, a voltage-controlled oscillator and a frequency divider, wherein an output OP end of the phase frequency detector is connected with an input IP end of the charge pump, and an output ON end of the phase frequency detector is connected with an input IN end of the charge pump;
Dependencies are inferred from the claim text.