Analysis and design of power efficient semi-passive RFID tag |
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| Che Wenyi, Guan Shuo, Wang Xiao, Xiong Tingwen, Xi Jingtian, Tan Xi, Yan Na, Min Hao. Analysis and design of power efficient semi-passive RFID tag[J]. Journal of Semiconductors, 2010, 31(7): 075013. doi: 10.1088/1674-4926/31/7/075013 Che W Y, Guan S, Wang X, Xiong T W, Xi J T, Tan X, Yan N, Min H. Analysis and design of power efficient semi-passive RFID tag[J]. J. Semicond., 2010, 31(7): 075013. doi: 10.1088/1674-4926/31/7/075013.Export: BibTex EndNote |
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| Authors: | Che Wenyi Guan Shuo Wang Xiao Xiong Tingwen Xi Jingtian Tan Xi Yan Na Min Hao |
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| Affiliation: | State Key Laboratory of ASIC and System, Auto-ID Laboratory, Fudan University, Shanghai 201203, China;State Key Laboratory of ASIC and System, Auto-ID Laboratory, Fudan University, Shanghai 201203, China;State Key Laboratory of ASIC and System, Auto-ID Laboratory, Fudan University, Shanghai 201203, China;State Key Laboratory of ASIC and System, Auto-ID Laboratory, Fudan University, Shanghai 201203, China;State Key Laboratory of ASIC and System, Auto-ID Laboratory, Fudan University, Shanghai 201203, China;State Key Laboratory of ASIC and System, Auto-ID Laboratory, Fudan University, Shanghai 201203, China;State Key Laboratory of ASIC and System, Auto-ID Laboratory, Fudan University, Shanghai 201203, China;State Key Laboratory of ASIC and System, Auto-ID Laboratory, Fudan University, Shanghai 201203, China |
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| Abstract: | The analysis and design of a semi-passive radio frequency identification (RFID) tag is presented. By study-ing 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. Accord-ing 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 mm2, and is adaptable to batteries with a 1.2 to 2.4 V output voltage. |
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| Keywords: | RFID semi-passive tag power conversion efficiency AC-DC charge pump wake-up circuit |
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