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A 1.1 nW Energy-Harvesting System with 544 pW Quiescent Power for Next-Generation Implants

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Show simple item record Bandyopadhyay, Saurav Mercier, Patrick Philip Lysaght, Andrew Christopher Stankovic, Konstantina M. Chandrakasan, Anantha P. 2015-12-13T20:16:29Z 2015-12-13T20:16:29Z 2014-09
dc.identifier.issn 0018-9200
dc.identifier.issn 1558-173X
dc.description.abstract This paper presents a nW power management unit (PMU) for an autonomous wireless sensor that sustains itself by harvesting energy from the endocochlear potential (EP), the 70-100 mV electrochemical bio-potential inside the mammalian ear. Due to the anatomical constraints inside the inner ear, the total extractable power from the EP is limited close to 1.1-6.25 nW. A nW boost converter is used to increase the input voltage (30-55 mV) to a higher voltage (0.8-1.1 V) usable by CMOS circuits in the sensor. A pW charge pump circuit is used to minimize the leakage in the boost converter. Furthermore, ultralow-power control circuits consisting of digital implementations of input impedance adjustment circuits and zero current switching circuits along with Timer and Reference circuits keep the quiescent power of the PMU down to 544 pW. The designed boost converter achieves a peak power conversion efficiency of 56%. The PMU can sustain itself, and a duty-cyled ultralow-power load while extracting power from the EP of a live guinea pig. The PMU circuits have been implemented on a 0.18- μm CMOS process. en_US
dc.description.sponsorship Semiconductor Research Corporation. Focus Center for Circuit and System Solutions (C2S2) en_US
dc.description.sponsorship Interconnect Focus Center (United States. Defense Advanced Research Projects Agency and Semiconductor Research Corporation) en_US
dc.description.sponsorship National Institutes of Health (U.S.) (Grant K08 DC010419) en_US
dc.description.sponsorship National Institutes of Health (U.S.) (Grant T32 DC00038) en_US
dc.description.sponsorship Bertarelli Foundation en_US
dc.language.iso en_US
dc.publisher Institute of Electrical and Electronics Engineers (IEEE) en_US
dc.relation.isversionof en_US
dc.rights Creative Commons Attribution-Noncommercial-Share Alike en_US
dc.rights.uri en_US
dc.source PMC en_US
dc.title A 1.1 nW Energy-Harvesting System with 544 pW Quiescent Power for Next-Generation Implants en_US
dc.type Article en_US
dc.identifier.citation Bandyopadhyay, Saurav, Patrick P. Mercier, Andrew C. Lysaght, Konstantina M. Stankovic, and Anantha P. Chandrakasan. “A 1.1 nW Energy-Harvesting System with 544 pW Quiescent Power for Next-Generation Implants.” IEEE Journal of Solid-State Circuits 49, no. 12 (December 2014): 2812–2824. en_US
dc.contributor.department Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science en_US
dc.contributor.mitauthor Bandyopadhyay, Saurav en_US
dc.contributor.mitauthor Chandrakasan, Anantha P. en_US
dc.relation.journal IEEE Journal of Solid-State Circuits en_US
dc.identifier.mitlicense OPEN_ACCESS_POLICY en_US
dc.eprint.version Author's final manuscript en_US
dc.type.uri en_US
eprint.status en_US
dspace.orderedauthors Bandyopadhyay, Saurav; Mercier, Patrick P.; Lysaght, Andrew C.; Stankovic, Konstantina M.; Chandrakasan, Anantha P. en_US

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