题目/Title：A Novel Demodulator for Low Modulation Index RF Signal in Passive UHF RFID Tag

作者/Author：刘忠奇,张春,李永明,王自强,王志华
                        Zhongqi Liu,Chun Zhang,Yongming Li,Ziqiang Wang,Zhihua Wang

会议/Conference：ISCAS 2009

地点/Location：Taiwan

年份/Issue Date：2009.24 May

页码/pages：pp. 2109 - 2112

摘要/Abstract：
This paper presents a novel ASK demodulator for passive UHF RFID (Radio Frequency Identification) tag, which can detect minimum 10% modulation index over a RF power range of 30dB. Compared with conventional nonlinear voltage and linear current demodulations, the detection sensitivity over a wider range is increased by adopting an innovative divisional linear voltage demodulation with ultra low power consumption. The demodulator is implemented in UMC 0.18µm mixed-mode CMOS technology. The power consumption is 3.95µW and it can be reduced to 3.08µW when the modulation index is large.