Title:
NEAR FIELD COMMUNICATION CHIP, PHASE SYNCHRONIZATION METHOD, AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/257051
Kind Code:
A1
Abstract:
The embodiments of the present application relate to the technical field of communications, and can realize fast synchronization between a transmission signal of an NFC card device and a carrier of an NFC card reader. Provided are a near field communication chip, a phase synchronization method, and an electronic device. The near field communication chip comprises: a processing circuit, which is used for determining a first carrier frequency offset of a local clock signal and a carrier clock signal, and generating a first frequency control word according to the first carrier frequency offset, wherein the carrier clock signal is determined according to a received signal which is received by the near field communication chip; a phase-locked loop, which is used for generating a first clock signal according to the local clock signal and the first frequency control word; and a phase alignment circuit, which is used for performing phase selection on the first clock signal according to the carrier clock signal, so as to obtain a second clock signal and send same to a transmission circuit.
Inventors:
YU RUI (CN)
CHEN XUESONG (CN)
LIU SUPENG (CN)
WANG LEI (CN)
YU ZHAN (CN)
YEO THENG TEE (CN)
CHEN XUESONG (CN)
LIU SUPENG (CN)
WANG LEI (CN)
YU ZHAN (CN)
YEO THENG TEE (CN)
Application Number:
PCT/CN2021/099251
Publication Date:
December 15, 2022
Filing Date:
June 09, 2021
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H04B5/00; H03L7/18
Foreign References:
| CN107707278A | 2018-02-16 | |||
| US9559833B1 | 2017-01-31 | |||
| CN110061763A | 2019-07-26 | |||
| US20180248722A1 | 2018-08-30 | |||
| US20160294398A1 | 2016-10-06 |
Attorney, Agent or Firm:
BEIJING ZBSD PATENT & TRADEMARK AGENT LTD. (CN)
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