Title:
PHASE-FREQUENCY DETECTOR, PHASE-LOCKED LOOP, AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/179261
Kind Code:
A1
Abstract:
The present application provides a phase-frequency detector, a phase-locked loop, and an electronic device, and relates to the technical field of integrated circuits. The phase-frequency detector is at least one order of magnitude faster and more precise compared to the time at which traditional solutions are depleted when detecting phase and frequency. The phase-frequency detector comprises: a two-phase synchronous logic circuit, a time-to-digital converter, a counter, and a phase-frequency detection logic circuit. The two-phase synchronous logic circuit receives a local clock signal and a reference clock signal; the counter determines a first number of complete periods of the local clock signal during n periods of the reference clock signal; the time-to-digital converter determines a coefficient and a second number of unit steps in an incomplete period of the local clock signal during n periods of the reference clock signal; and the phase-frequency detection logic circuit determines, according to the first number, the second number and the coefficient, a first phase difference between the reference clock signal and the local clock signal during n periods of the reference clock signal.
Inventors:
ZHANG JINHAI (CN)
Application Number:
PCT/CN2023/076786
Publication Date:
September 28, 2023
Filing Date:
February 17, 2023
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H03L7/087
Foreign References:
| CN113411081A | 2021-09-17 | |||
| CN114142851A | 2022-03-04 | |||
| CN1494218A | 2004-05-05 | |||
| CN1617451A | 2005-05-18 | |||
| US20010030565A1 | 2001-10-18 | |||
| US6466098B2 | 2002-10-15 | |||
| CN103441759A | 2013-12-11 |
Attorney, Agent or Firm:
BEIJING ZBSD PATENT & TRADEMARK AGENT LTD. (CN)
Download PDF: