Title :
A semi-passive UHF RFID tag with on-chip temperature sensor
Author :
Che, Wenyi ; Meng, Dechao ; Chang, Xuegui ; Chen, Wei ; Wang, Lifang ; Yang, Yuqing ; Xu, Conghui ; Tan, Xi ; Yan, Na ; Min, Hao
Author_Institution :
State Key Lab. of ASIC & Syst., Fudan Univ., Shanghai, China
Abstract :
A semi-passive UHF temperature sensor tag compatible with ISO 18000-6C protocol Revision-1 is presented in this paper. Novel power management techniques are proposed to prolong battery life, including two-stage wake-up detection, optimized rectifier design for wireless recharge, quasi CC-CV battery charging, and on-chip battery voltage surveillance. Both real-time temperature sensing and temperature log function are implemented with a bandgap based PTAT circuit. It has a - 40~100°C sensing range with ±1.6°C accuracy. The tag is fabricated in 0.18 μm CMOS technology with EEPROM. Measured sensitivity and standby current are -23.7 dBm and 150 nA respectively.
Keywords :
battery chargers; radiofrequency identification; temperature sensors; CMOS technology; EEPROM; ISO 18000-6C protocol Revision-1; current 150 nA; on-chip battery voltage surveillance; on-chip temperature sensor; optimized rectifier design; power management techniques; quasi CC-CV battery charging; semi-passive UHF RFID tag; size 0.18 mum; two-stage wake-up detection; wireless recharge; Batteries; Current measurement; Radiofrequency identification; Rectifiers; Temperature measurement; Temperature sensors;
Conference_Titel :
Custom Integrated Circuits Conference (CICC), 2010 IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-4244-5758-8
DOI :
10.1109/CICC.2010.5617397
