Design and optimization on dynamic power system for self-powered integrated wireless sensing nodes

Dongsheng Ma, Janet M. Wang, Mohankumar N. Somasundaram, Zongqi Hu

Research output: Contribution to journalConference article

6 Scopus citations

Abstract

This paper presents an integrated power system for low-power wireless sensor networks with dynamic efficiency optimization technique. By adaptively resizing power transistors and adjusting switching frequency, system efficiency is enhanced significantly. Theoretical analysis is elaborated to support the proposed technique. A prototype integrated power system for self-powered photovoltaic wireless sensing node was designed and simulated with TSMC 0.35μm CMOS process. With a power range of 0.5μW to 10mW, power efficiency stays above 71%. Tolerance between theoretical and simulated optimal power transistor sizes is less than 6.7%, while that of optimal switching frequencies is less than 5%. The paper gives another solution to minimizing system power in the perspective of power processing.

Original languageEnglish (US)
Pages (from-to)303-306
Number of pages4
JournalProceedings of the International Symposium on Low Power Electronics and Design
DOIs
StatePublished - Jan 1 2005
Event2005 International Symposium on Low Power Electronics and Design - San Diego, CA, United States
Duration: Aug 8 2005Aug 10 2005

Keywords

  • Charge pump
  • DC-DC converter
  • Dynamic power loss control
  • Power efficiency
  • Wireless sensing node

ASJC Scopus subject areas

  • Engineering(all)

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