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900 MHz CMOS RF-to-DC converter using a cross-coupled charge pump for energy harvesting

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4 Author(s)
Kwangrok You ; Sch. of Inf. & Commun. Eng., SungKyunKwan Univ., Suwon, South Korea ; HyungChul Kim ; Minsu Kim ; Youngoo Yang

This paper presents a CMOS RF-to-DC converter with a cross-coupled charge pump for energy harvesting. The proposed RF-to-DC converter consists of a cross-coupled rectifier and a cross-coupled charge pump. The charge pump can operate with a non-overlapping clock with a switching frequency of 25 MHz using a pump capacitance of 4 pF. The RF-to-DC converter IC was designed and fabricated using a 0.13 μm CMOS process. An output voltage of 2.05 V was achieved at an RF input power of -6 dBm with an input frequency of 900 MHz and the load of 100 KΩ. For this condition, the charge pump exhibited a high efficiency of about 74 %.

Published in:

Radio-Frequency Integration Technology (RFIT), 2011 IEEE International Symposium on

Date of Conference:

Nov. 30 2011-Dec. 2 2011