CMOS UHF Rectifier

Zhou Shenghua; Wu Nanjian

Chin. J. Semicond. > 2007, Volume 28 > Issue 9 > 1471-1476

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CMOS UHF Rectifier

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Abstract: This paper presents an RF CMOS rectifier for a passive UHF RFID tag chip.The rectifier includes an RF-DC converter,a bias,a DC-DC converter,and an oscillator.The operating frequency range of the rectifier is 860～960MHz.The design of the rectifier is based on 0.18μm,1p6m standard digital CMOS process.A switched capacitor circuit technique is used to provide active bias to solve the threshold voltage problem in CMOS transistors.The size of the rectifier is 180μm×140μm.Under -16dBm,900MHz input RF power,the rectifier creates 1.2V Vpp output,and the startup time is 980μs.

Key words: rectifier, RFID, passive transponder, low power.

1	A passive UHF RFID tag with a dynamic-V_th-cancellation rectifier Jinpeng Shen, Bo Wang, Shan Liu, Xin'an Wang, Zhengkun Ruan, et al. Journal of Semiconductors, 2013, 34(9): 095005. doi: 10.1088/1674-4926/34/9/095005
2	A voltage regulator system with dynamic bandwidth boosting for passive UHF RFID transponders Jinpeng Shen, Xin'an Wang, Shan Liu, Shoucheng Li, Zhengkun Ruan, et al. Journal of Semiconductors, 2013, 34(10): 105004. doi: 10.1088/1674-4926/34/10/105004
3	A passive UHF RFID tag chip with a dual-resolution temperature sensor in a 0.18 μm standard CMOS process Feng Peng, Zhang Qi, Wu Nanjian Journal of Semiconductors, 2011, 32(11): 115013. doi: 10.1088/1674-4926/32/11/115013
4	A current-mode voltage regulator with an embedded sub-threshold reference for a passive UHF RFID transponder Liu Zhongqi, Zhang Chun, Li Yongming, Wang Zhihua Journal of Semiconductors, 2010, 31(6): 065006. doi: 10.1088/1674-4926/31/6/065006
5	Analysis and design of power efficient semi-passive RFID tag Che Wenyi, Guan Shuo, Wang Xiao, Xiong Tingwen, Xi Jingtian, et al. Journal of Semiconductors, 2010, 31(7): 075013. doi: 10.1088/1674-4926/31/7/075013
6	An ultra-low-power CMOS temperature sensor for RFID applications Xu Conghui, Gao Peijun, Che Wenyi, Tan Xi, Yan Na , et al. Journal of Semiconductors, 2009, 30(4): 045003. doi: 10.1088/1674-4926/30/4/045003
7	Low-cost low-power UHF RFID tag with on-chip antenna Xi Jingtian, Yan Na, Che Wenyi, Xu Conghui, Wang Xiao, et al. Journal of Semiconductors, 2009, 30(7): 075012. doi: 10.1088/1674-4926/30/7/075012
8	Design of an ultra-low-power digital processor for passive UHF RFID tags Shi Wanggen, Zhuang Yiqi, Li Xiaoming, Wang Xianghua, Jin Zhao, et al. Journal of Semiconductors, 2009, 30(4): 045004. doi: 10.1088/1674-4926/30/4/045004
9	Low modulation index RF signal detection for a passive UHF RFID transponder Liu Zhongqi, Zhang Chun, Li Yongming, Wang Zhihua Journal of Semiconductors, 2009, 30(9): 095005. doi: 10.1088/1674-4926/30/9/095005
10	A Passive NCITS 256 UHF RFID Transponder Liu Zhongqi, Sun Xuguang, Bai Rongrong, Zhang Chun, Li Yongming, et al. Journal of Semiconductors, 2008, 29(4): 719-723.
11	A 1.8V CMOS Direct Conversion Receiver for a 900MHz RFID Reader Chip Tan Xi, Liu Yuan, Lu Lei, Yuan Lu, Yang Zhenyu, et al. Journal of Semiconductors, 2008, 29(9): 1734-1739.
12	Design of a Modulator and Demodulator for UHF RFID Readers Gao Tianbao, Wang Jingchao, Zhang Chun, Li Yongming, Wang Zhihua, et al. Journal of Semiconductors, 2008, 29(7): 1403-1406.
13	CMOS Implementation of an RF PLL Synthesizer for Use in RFID Systems Xie Weifu, Li Yongming, Zhang Chun, Wang Zhihua Journal of Semiconductors, 2008, 29(8): 1595-1601.
14	A Novel Impedance Matching Approach for Passive UHF RFID Transponder ICs Chen Liying, Mao Luhong, Wu Shunhua, Zheng Xuan Journal of Semiconductors, 2008, 29(3): 516-520.
15	A Novel Power Supply Solution of a Passive RFID Transponder Jia Hailong, Ni Weining, Shi Yin, Dai F F Chinese Journal of Semiconductors , 2007, 28(9): 1346-1352.
16	A Low Power,Large Dynamic Range 915MHz Passive RFID Tag Bai Rongrong, Li Yongming, Zhang Chun, Wang Zhihua Chinese Journal of Semiconductors , 2007, 28(8): 1316-1319.
17	Design of an Analog Front End for Passive UHF RFID Transponder IC Chen Liying, Wu Shunhua, Mao Luhong, Hao Xianren Chinese Journal of Semiconductors , 2007, 28(5): 686-691.
18	An Ultra-Low-Power Embedded EEPROM for Passive RFID Tags Yan Na, Tan Xi, Zhao Dixian, Min Hao Chinese Journal of Semiconductors , 2006, 27(6): 994-998.
19	Small Size,Low Power RFID RF Front End Circuit Design Zhou Shenghua, Yang Zhichao, Wu Nanjian, Li Meiyun Chinese Journal of Semiconductors , 2006, 27(S1): 361-364.
20	Design and Analysis of Analog Front-End of Passive RFID Transponders Hu Jianyun, He Yan, Min Hao Chinese Journal of Semiconductors , 2006, 27(6): 999-1005.

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Zhou Shenghua, Wu Nanjian. CMOS UHF Rectifier[J]. Journal of Semiconductors, 2007, 28(9): 1471-1476.

Zhou S H, Wu N J. CMOS UHF Rectifier[J]. Chin. J. Semicond., 2007, 28(9): 1471.

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Received: 18 August 2015 Revised: 08 April 2007 Online: Published: 01 September 2007

This paper presents an RF CMOS rectifier for a passive UHF RFID tag chip.The rectifier includes an RF-DC converter,a bias,a DC-DC converter,and an oscillator.The operating frequency range of the rectifier is 860～960MHz.The design of the rectifier is based on 0.18μm,1p6m standard digital CMOS process.A switched capacitor circuit technique is used to provide active bias to solve the threshold voltage problem in CMOS transistors.The size of the rectifier is 180μm×140μm.Under -16dBm,900MHz input RF power,the rectifier creates 1.2V Vpp output,and the startup time is 980μs.

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