Microelectronic techniques for frequency tuning of piezo-electric energy harvesting devices

Devices that harvest electrical energy from mechanical vibrations have the problem that the frequency of the source vibration is often not matched to the resonant frequency of the energy harvesting device. The source vibration may vary with time, and it may have a broad spectrum. Previous work has r...

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Bibliographic Details
Published in2012 IEEE Subthreshold Microelectronics Conference pp. 1 - 4
Main Authors Jianying Zhao, Ramadass, Y., Buss, D., Jianguo Ma
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.10.2012
Subjects
Strain
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ISBN1467315869
9781467315869
DOI10.1109/SubVT.2012.6404324

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Summary:Devices that harvest electrical energy from mechanical vibrations have the problem that the frequency of the source vibration is often not matched to the resonant frequency of the energy harvesting device. The source vibration may vary with time, and it may have a broad spectrum. Previous work has recognized that maximum output power can be obtained over a fairly broad spectrum using a tunable, complex reactive impedance at the output of the device. The present paper explores the bias-flip (BF) technique, along with other microelectronic techniques, to implement this tunable, complex reactive impedance.
ISBN:1467315869
9781467315869
DOI:10.1109/SubVT.2012.6404324