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Ultra-low voltage power management and computation methodology for energy harvesting applications

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4 Author(s)
Chi-ying Tsui ; Dept. of Electr. & Electron. Eng., Hong Kong Univ. of Sci. & Technol., China ; Hui Shao ; Wing-Hung Ki ; Feng Su

A power management and computation methodology is proposed for ultra-low power energy harvesting applications. An integrated exponential charge pump that accepts an input voltage of 190mV and provides an unregulated output voltage of -2V serves as the supply. To comply with a fluctuated and unregulated supply, a supply-side charge-base computation methodology is proposed, of which the computation activity tracks with the fluctuation of the available energy. The idea is demonstrated in a test chip fabricated using a 0.35μm technology.

Published in:

VLSI Circuits, 2005. Digest of Technical Papers. 2005 Symposium on

Date of Conference:

16-18 June 2005