公开(公告)号：US20240291518A1

公开(公告)日：2024-08-29

申请号：US18470751

申请日：2023-09-20

Applicant: Samsung Electronics Co., Ltd.

Inventor： Nyeongmin KWON ,  Seokyeong KWON ,  Seok-Hyun KIM

IPC: H04B5/00 ,  H03H7/38

CPC classification number: H04B5/77 ,  H03H7/38

Abstract: A short-range wireless communication device includes an impedance matching circuit configured to output a radio frequency (RF) signal in a turn-on period, the RF signal being based on a reference clock signal, and output a sensing signal in a turn-off period, and processing circuitry configured to extract a recovered clock signal from the sensing signal, detect a phase difference between the recovered clock signal and the reference clock signal, and detect a resonant frequency of the impedance matching circuit based on the phase difference.