Design and Implementation of A Sub-1V Analog Front-end for Passive UHF RFID Tag

This paper presents a fully integrated sub-1V passive UHF RFID tag analog front-end (AFE) complying with ISO/IEC 18000-6B protocol. On-chip supply voltage is designed to be 0.95V to reduce power consumption. The design of rectifier, limiter, reference, regulator, modulator and demodulator worked under sub-1V are discussed in detail. The AFE and baseband processor were fabricated in TSMC 0.18μm mixed-signal CMOS process with a die size of 622μm×605μm. Test results show that the AFE operates at 0.95V with the power consumption of 22.66μW.