Invention Grant
- Patent Title: Phase-locked loop circuit and operation method thereof
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Application No.: US17966463Application Date: 2022-10-14
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Publication No.: US12028082B2Publication Date: 2024-07-02
- Inventor: Ja Yol Lee
- Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
- Applicant Address: KR Daejeon
- Assignee: Electronics and Telecommunications Research Institute
- Current Assignee: Electronics and Telecommunications Research Institute
- Current Assignee Address: KR Daejeon
- Agency: Rabin & Berdo, P.C.
- Priority: KR 20210138191 2021.10.18
- Main IPC: H03L7/099
- IPC: H03L7/099 ; H03L7/081 ; H03L7/091

Abstract:
A phase-locked loop circuit includes a voltage controlled oscillator (VCO) that generates a VCO clock in response to a voltage control signal, a divider that divides the VCO clock to output a division clock, a phase-frequency error detector that receives a reference clock and outputs a first error compensation signal, a sampler that receives the reference clock and oversamples the reference clock at a rising edge or a falling edge to output a sampling clock, a window phase error detector that receives the reference clock and outputs a second error compensation signal, a residue phase error detector that outputs a third error compensation signal, an adder that accumulates the first error compensation signal, the second error compensation signal, and the third error compensation signal to output a final error compensation signal, and a loop filter that converts and output the final error compensation signal into the voltage control signal.
Public/Granted literature
- US20230119518A1 PHASE-LOCKED LOOP CIRCUIT AND OPERATION METHOD THEREOF Public/Granted day:2023-04-20
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