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Sensors 2017, 17(4), 867; doi:10.3390/s17040867

Low Power Near Field Communication Methods for RFID Applications of SIM Cards

1
Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
2
School of Optical and Electronic Information, Huazhong University of Science & Technology, Wuhan 430074, China
*
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 25 February 2017 / Revised: 11 April 2017 / Accepted: 13 April 2017 / Published: 14 April 2017
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [3653 KB, uploaded 17 April 2017]   |  

Abstract

Power consumption and communication distance have become crucial challenges for SIM card RFID (radio frequency identification) applications. The combination of long distance 2.45 GHz radio frequency (RF) technology and low power 2 kHz near distance communication is a workable scheme. In this paper, an ultra-low frequency 2 kHz near field communication (NFC) method suitable for SIM cards is proposed and verified in silicon. The low frequency transmission model based on electromagnetic induction is discussed. Different transmission modes are introduced and compared, which show that the baseband transmit mode has a better performance. The low-pass filter circuit and programmable gain amplifiers are applied for noise reduction and signal amplitude amplification. Digital-to-analog converters and comparators are used to judge the card approach and departure. A novel differential Manchester decoder is proposed to deal with the internal clock drift in range-controlled communication applications. The chip has been fully implemented in 0.18 µm complementary metal-oxide-semiconductor (CMOS) technology, with a 330 µA work current and a 45 µA idle current. The low frequency chip can be integrated into a radio frequency SIM card for near field RFID applications. View Full-Text
Keywords: subscriber identity module (SIM); near field communication; radio frequency identification; low-power design subscriber identity module (SIM); near field communication; radio frequency identification; low-power design
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Chen, Y.; Zheng, Z.; Gong, M.; Yu, F. Low Power Near Field Communication Methods for RFID Applications of SIM Cards. Sensors 2017, 17, 867.

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