US Patent No. 10,194,409

NEAR FIELD COMMUNICATION DEVICE AND AN OPERATING METHOD OF THE NEAR FIELD COMMUNICATION DEVICE


Patent No. 10,194,409
Issue Date January 29, 2019
Title Near Field Communication Device And An Operating Method Of The Near Field Communication Device
Inventorship Byeongtaek Moon, Seoul (KR)
Jongpil Cho, Hwaseong-si (KR)
Junho Kim, Yongin-si (KR)
Iljong Song, Suwon-si (KR)
Assignee SAMSUNG ELECTRONICS CO., LTD., Suwon-si, Gyeonggi-Do (KR)

Claim of US Patent No. 10,194,409

1. A near field communication (NFC) device, comprising:an antenna;
a matching circuit connected to the antenna;
a clock extraction block configured to extract a clock from a signal received by the antenna and to output the extracted clock;
a frequency compensation block configured to compensate for a frequency of the extracted clock and to output a compensated clock; and
a modulation and amplification block configured to perform modulation and amplification by using the compensated clock and to output a transmit signal to the matching circuit,
wherein a first extracted clock has a first frequency that is extracted when the transmit signal is not output and a second extracted clock has a second frequency that is extracted when the transmit signal is output, and
wherein the frequency compensation block compensates for the second frequency of the second extracted clock based on a difference between the first frequency of the first extracted clock and the second frequency of the second extracted clock.