Title :
Ultra-low power analog front-end for passive UHF RFID tags
Author :
Shen, J.P. ; Wang, X.A. ; Liu, Siyuan ; Huang, Jhin Fang
Author_Institution :
Key Lab. of Integrated Microsyst., Peking Univ., Shenzhen, China
Abstract :
This paper presents an ultra-low power analog front-end circuit for passive UHF RFID tags. To improve power conversion efficiency, Schottky barrier diode based rectifier is adopted. The design of an area-efficient ASK demodulator with a novel average generator is discussed in detail. Most of the analog blocks are designed to work under sub-1v to reduce power consumption. The analog front-end circuit is implemented in 0.18 μm CMOS process. Measurement results show that with a 110kΩ resistor load, the power conversion efficiency of the rectifier reaches as high as 33.6%. The total power consumption of the analog front-end circuit is only 2.4 μW.
Keywords :
CMOS analogue integrated circuits; amplitude shift keying; energy consumption; power conversion; radiofrequency identification; rectifiers; resistors; CMOS process; Schottky barrier diode based rectifier; area-efficient modulator; passive UHF RFID tag; power consumption reduction; power conversion efficiency; resistor load; ultra-low power analog front-end circuit; RFID; demodulator; low power; rectifier;
Conference_Titel :
Information Science and Control Engineering 2012 (ICISCE 2012), IET International Conference on
Conference_Location :
Shenzhen
Electronic_ISBN :
978-1-84919-641-3
DOI :
10.1049/cp.2012.2369
