The analysis and design of a semi-passive radio frequency identification（RFID） tag is presented.By studying the power transmission link of the backscatter RFID system and exploiting a power conversion efficiency mod...The analysis and design of a semi-passive radio frequency identification（RFID） tag is presented.By studying the power transmission link of the backscatter RFID system and exploiting a power conversion efficiency model for a multi-stage AC-DC charge pump,the calculation method for semi-passive tag＇s read range is proposed.According to different read range limitation factors,an intuitive way to define the specifications of tag＇s power budget and backscatter modulation index is given.A test chip is implemented in SMIC 0.18μm standard CMOS technology under the guidance of theoretical analysis.The main building blocks are the threshold compensated charge pump and low power wake-up circuit using the power triggering wake-up mode.The proposed semi-passive tag is fully compatible to EPC C1G2 standard.It has a compact chip size of 0.54 mm^2,and is adaptable to batteries with a 1.2 to 2.4 V output voltage.展开更多
基金Project supported by the Ministry of Science & Technology of China(No.2008BAI55B07)the State Key Laboratory of ASIC and System,Fudan University,China(No.09MS009).
文摘The analysis and design of a semi-passive radio frequency identification（RFID） tag is presented.By studying the power transmission link of the backscatter RFID system and exploiting a power conversion efficiency model for a multi-stage AC-DC charge pump,the calculation method for semi-passive tag＇s read range is proposed.According to different read range limitation factors,an intuitive way to define the specifications of tag＇s power budget and backscatter modulation index is given.A test chip is implemented in SMIC 0.18μm standard CMOS technology under the guidance of theoretical analysis.The main building blocks are the threshold compensated charge pump and low power wake-up circuit using the power triggering wake-up mode.The proposed semi-passive tag is fully compatible to EPC C1G2 standard.It has a compact chip size of 0.54 mm^2,and is adaptable to batteries with a 1.2 to 2.4 V output voltage.
