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Ultra-low-voltage low-power charge pump for solar energy harvesting systems

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5 Author(s)
Jingjing Che ; Inst. of Microelectron., Tsinghua Univ., Beijing, China ; Chun Zhang ; Zhongqi Liu ; Ziqiang Wang
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This paper exploits a new charge pump used in integrated solar energy harvesting systems to improve the power efficiency under ultra low supply of under 0.7 V supplied by on-chip photodiodes. Compared with conventional charge pumps, improvements of 20% in terms of output voltage gain and conversion efficiency can be achieved by using two symmetrical branches and PMOSFET-only transfer transistors per stage. The proposed circuit is implemented in UMC 0.18 mum standard CMOS technology.

Published in:

Communications, Circuits and Systems, 2009. ICCCAS 2009. International Conference on

Date of Conference:

23-25 July 2009

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