Invention Grant
- Patent Title: Fast lock phase-locked loop circuit for avoiding cycle slip
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Application No.: US17668394Application Date: 2022-02-10
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Publication No.: US11641207B2Publication Date: 2023-05-02
- Inventor: Zhiwei Xu , Jiangbo Chen , Jiabing Liu , Hui Nie , Zhihao Lv , Chunyi Song
- Applicant: ZHEJIANG UNIVERSITY
- Applicant Address: CN Zhejiang
- Assignee: ZHEJIANG UNIVERSITY
- Current Assignee: ZHEJIANG UNIVERSITY
- Current Assignee Address: CN Zhejiang
- Agency: W&G Law Group
- Priority: CN201910811308.X 20190830
- Main IPC: H03L7/089
- IPC: H03L7/089 ; H03L7/093 ; H03L7/099 ; H03L7/10

Abstract:
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.
Public/Granted literature
- US20220311444A1 FAST LOCK PHASE-LOCKED LOOP CIRCUIT FOR AVOIDING CYCLE SLIP Public/Granted day:2022-09-29
Information query
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