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Design of a Low-Power CMOS Analog Front-End Circuit for UHF Band RFID Tag Chips  

Shim, Hyun-Chul (Dept. of Electronics Engineering, University of Incheon)
Cha, Chung-Hyun (Dept. of Electronics Engineering, University of Incheon)
Park, Jong-Tae (Dept. of Electronics Engineering, University of Incheon)
Yu, Chong-Gun (Dept. of Electronics Engineering, University of Incheon)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SD / v.45, no.6, 2008 , pp. 28-36 More about this Journal
Abstract
This paper describes a low-power CMOS analog front-end block for UHF band RFID tag chips. It satisfies ISO/IEC 18000-6C and includes a memory block for test. For reducing power consumption, it operates with an internally generated power supply of 1V. An ASK demodulator using a current-mode schmitt trigger is proposed and designed. The proposed demodulator can more exactly demodulate than conventional demodulator with low current consumption. It is designed using a $0.18{\mu}m$ CMOS technology. Measurement results show that it can operate properly with an input as low as $0.25V_{peak}$ and consumes $2.63{\mu}A$. The chip size is $0.12mm^2$.
Keywords
UHF; RFID; Tag chip; Low power; Current mode; ASK demodulator;
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