Title :
Ultra-low-voltage low-power charge pump for solar energy harvesting systems
Author :
Che, Jingjing ; Zhang, Chun ; Liu, Zhongqi ; Wang, Ziqiang ; Wang, ZhiHua
Author_Institution :
Inst. of Microelectron., Tsinghua Univ., Beijing, China
Abstract :
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.
Keywords :
CMOS integrated circuits; charge pump circuits; energy harvesting; low-power electronics; photodiodes; power MOSFET; solar energy conversion; PMOSFET-only transfer transistor; charge pump; on-chip photodiode; size 0.18 mum; solar energy harvesting system; standard CMOS technology; ultra-low-voltage low-power supply; CMOS technology; Capacitors; Charge pumps; Circuits; Clocks; Diodes; Photodiodes; Solar energy; Switches; Threshold voltage;
Conference_Titel :
Communications, Circuits and Systems, 2009. ICCCAS 2009. International Conference on
Conference_Location :
Milpitas, CA
Print_ISBN :
978-1-4244-4886-9
Electronic_ISBN :
978-1-4244-4888-3
DOI :
10.1109/ICCCAS.2009.5250409
