公开(公告)号：US20170085298A1

公开(公告)日：2017-03-23

申请号：US15269126

申请日：2016-09-19

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： JONGPIL CHO ,  JUNESOO KIM ,  YOUNGJOO LEE

IPC: H04B5/00

CPC classification number: H04B5/0062 ,  G06K7/10237 ,  G06K7/10297 ,  G08C17/02 ,  H04B5/0025

Abstract: A radio-frequency (RF) communication device having a near field communication (NFC) function includes a first detection mode circuit configured to output an RF input signal received by an antenna as a first RF signal while the first detection mode circuit is enabled, and a second detection mode circuit configured to amplify the RF input signal and output the amplified RF input signal as a second RF signal while the second detection mode circuit is enabled. The first detection mode circuit is enabled during a first time period, and the second detection mode circuit is enabled during a second time period. The second time period is shorter than the first time period. The first and second detection mode circuits are enabled alternately and repeatedly.

公开(公告)号：US20180070198A1

公开(公告)日：2018-03-08

申请号：US15458051

申请日：2017-03-14

Applicant: Samsung Electronics Co., Ltd.

Inventor： JONGPIL CHO ,  YOUNGJOO LEE

IPC: H04W4/00 ,  H04W52/52 ,  H04L7/033

CPC classification number: H04W4/80 ,  G06K7/10237 ,  H04B5/0031 ,  H04B5/0075 ,  H04B5/02 ,  H04L7/033 ,  H04W52/52

Abstract: Disclosed is a near field communication device which includes an antenna, a transmission amplifier, a matching circuit connected between the antenna and the transmission amplifier, and a transmitter. The transmitter transmits a transmit clock to the matching circuit through the transmission amplifier, extracts an extraction clock from a waveform formed in the matching circuit, stores a phase difference between the transmit clock and the extraction clock, and controls transmission of an information signal through the antenna, the transmission amplifier, and the matching circuit based on the phase difference.