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Title:
PHASE-LOCKED LOOP CIRCUIT, CONTROL METHOD, CHARGE PUMP, AND CHIP
Document Type and Number:
WIPO Patent Application WO/2023/124558
Kind Code:
A1
Abstract:
The present application provides a phase-locked loop circuit, a control method, a charge pump, and a chip. The phase-locked loop circuit comprises: a phase frequency detector configured to receive a reference clock signal and an output signal of a frequency divider, and generate a charging/discharging control signal; a charge pump module configured to determine charging or discharging, determine the current magnitude of a charge pump proportional unit and a charge pump integral unit, and generate corresponding charging current or discharging current according to the determined charging or discharging and the current magnitude of the charge pump proportional unit and the charge pump integral unit; a loop filter configured to filter the charging current or discharging current to obtain a control voltage signal; a voltage-controlled oscillator configured to generate a phase-locked loop output signal having a preset frequency; and the frequency divider configured to perform frequency division on the phase-locked loop output signal, and input the signal subjected to frequency division to the phase frequency detector as the output signal. The phase-locked loop circuit provided by the present application can greatly reduce stray in the phase-locked loop.

Inventors:
CAI YAN (CN)
LIU SHUAIFENG (CN)
Application Number:
PCT/CN2022/130899
Publication Date:
July 06, 2023
Filing Date:
November 09, 2022
Export Citation:
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Assignee:
HEFEI CHIPSEA ELECTRONICS TECH CO LTD (CN)
International Classes:
H03L7/085; H03L7/089; H03L7/093; H03L7/099; H03L7/18
Foreign References:
CN114301451A2022-04-08
CN107634759A2018-01-26
CN105577183A2016-05-11
CN104202048A2014-12-10
CN104052470A2014-09-17
US20090167385A12009-07-02
US20080169850A12008-07-17
Attorney, Agent or Firm:
SHENZHEN CHINA INNOVATION SOUTH INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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