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Author Zhang, Xuefu ♦ Shang, Delong ♦ Xia, Fei ♦ Yakovlev, Alex
Source ACM Digital Library
Content type Text
Publisher Association for Computing Machinery (ACM)
File Format PDF
Copyright Year ©2011
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Switched capacitor DC/DC converter ♦ Asynchronous circuits ♦ Capacitor bank ♦ Energy harvesting ♦ Intelligent task and power scheduling ♦ Piezoelectric element
Abstract For systems depending on power harvesting, a fundamental contradiction in the power delivery chain has existed between conventional synchronous computational loads requiring relatively stable Vdd and power harvesters unable to supply it. DC/DC conversion has therefore been an integral part of such systems to resolve this contradiction. On the other hand, asynchronous computational loads, in addition to their potential power-saving capabilities, can be made tolerant to a much wider range of Vdd variance. This may open up opportunities for much more energy efficient methods of power delivery. This article presents in-depth investigations into the behavior and performance of different on-chip power delivery methods driving both asynchronous and synchronous loads directly from a harvester source. A novel power delivery method, which employs a capacitor bank for adaptively storing the energy from power harvesters depending on load and source conditions, is developed. Its advantages, especially when driving asynchronous loads, are demonstrated through comprehensive comparative analysis.
ISSN 15504832
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2011-12-01
Publisher Place New York
e-ISSN 15504840
Journal ACM Journal on Emerging Technologies in Computing Systems (JETC)
Volume Number 7
Issue Number 4
Page Count 22
Starting Page 1
Ending Page 22

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Source: ACM Digital Library