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A low-power RF front-end of passive UHF RFID transponders

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4 Author(s)
Changming Ma ; Beijing Tsinghua Tongfang Microelectron., Co., Ltd., Beijing ; Xingjun Wu ; Chun Zhang ; Zhihua Wang

This paper presents in details the architecture and most of RF front-end building blocks of a fully integrated passive radio frequency identification (RFID) transponder operating at UHF 902 MHz to 928 MHz. A novel architecture for the transponder IC and a new low power on-off keying (OOK) demodulator are proposed in this paper. For realizing the system, a low power CMOS full-wave rectifier achieving a power conversion efficiency of 31.9% has been integrated in this transponder. Simulation results show that the global input power of front-end circuits is only about 21 muw in order to drive a load of 1.8 muA at the rectifier output and the power consumption of the proposed demodulator is less than 0.4 muw. The transponder is fabricated in a 0.18 mum mixed-mode CMOS technology and has the area of 0.70 mm2.

Published in:

Circuits and Systems, 2008. APCCAS 2008. IEEE Asia Pacific Conference on

Date of Conference:

Nov. 30 2008-Dec. 3 2008

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