On-chip inductor-less indoor light energy harvester with improved efficiency for WSN/IoT device design

Hora, JA; Mayormita, MA; Rebollos, JRC; Zhu, X; Dutkiewicz, E

On-chip inductor-less indoor light energy harvester with improved efficiency for WSN/IoT device design

Hora, JA Mayormita, MA Rebollos, JRC Zhu, X Dutkiewicz, E

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Publisher:: IEEEE
Publication Type:: Conference Proceeding
Citation:: Proceedings of the International Conference on Sensing Technology, ICST, 2020, 2019-December, pp. 1-6
Issue Date:: 2020

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Field	Value	Language
dc.contributor.author	Hora, JA
dc.contributor.author	Mayormita, MA
dc.contributor.author	Rebollos, JRC
dc.contributor.author	Zhu, X
dc.contributor.author	Dutkiewicz, E https://orcid.org/0000-0002-4268-9286
dc.date	2019-12-02
dc.date.accessioned	2021-04-24T15:36:25Z
dc.date.available	2021-04-24T15:36:25Z
dc.date.issued	2020
dc.identifier.citation	Proceedings of the International Conference on Sensing Technology, ICST, 2020, 2019-December, pp. 1-6
dc.identifier.isbn	9781728146317
dc.identifier.issn	2156-8065
dc.identifier.issn	2156-8073
dc.identifier.uri	http://hdl.handle.net/10453/148329
dc.description.abstract	© 2019 IEEE. An on-chip inductor-less indoor light energy harvester circuit block for internet-of-things wireless sensor node device design is implemented in 65nm CMOS process technology. The design of the indoor light energy harvester comprises a bootstrapped ring oscillator, a two-phase non-overlapping clock generator, a tapered buffer, a multi-stage differential-drive CMOS rectifier, a charge controlling circuit and a voltage regulator. The system boosts an input of 500 mV from a photovoltaic cell without using a typical boost converter circuit that employs an inductor element. Hence, a simplified on-chip design charges an external 1.3-V rechargeable battery. The use of a multi-stage differential-drive rectifier eliminates the need for expensive on-chip inductors. A charge control circuit is implemented to maintain the battery voltage and avoid overcharging, thus improving battery life. A low-dropout voltage regulator further regulates the battery voltage to produce a stable dc voltage. The chip core design has a total area of 1342μm×1011μm. The output of the harvesting system is a regulated 0.9 V supply with 1.05 mA current at full load.
dc.language	en
dc.publisher	IEEEE
dc.relation.ispartof	Proceedings of the International Conference on Sensing Technology, ICST
dc.relation.ispartof	International Conference on Sensing Technology
dc.relation.isbasedon	10.1109/ICST46873.2019.9047728
dc.rights	info:eu-repo/semantics/closedAccess
dc.title	On-chip inductor-less indoor light energy harvester with improved efficiency for WSN/IoT device design
dc.type	Conference Proceeding
utslib.citation.volume	2019-December
utslib.location.activity	Sydney, Australia
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Strength - GBDTC - Global Big Data Technologies
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
utslib.copyright.status	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2021-04-24T15:36:23Z
pubs.finish-date	2019-12-04
pubs.place-of-publication	Piscataway, USA
pubs.publication-status	Published
pubs.start-date	2019-12-02
pubs.volume	2019-December
dc.location	Piscataway, USA

Abstract:

© 2019 IEEE. An on-chip inductor-less indoor light energy harvester circuit block for internet-of-things wireless sensor node device design is implemented in 65nm CMOS process technology. The design of the indoor light energy harvester comprises a bootstrapped ring oscillator, a two-phase non-overlapping clock generator, a tapered buffer, a multi-stage differential-drive CMOS rectifier, a charge controlling circuit and a voltage regulator. The system boosts an input of 500 mV from a photovoltaic cell without using a typical boost converter circuit that employs an inductor element. Hence, a simplified on-chip design charges an external 1.3-V rechargeable battery. The use of a multi-stage differential-drive rectifier eliminates the need for expensive on-chip inductors. A charge control circuit is implemented to maintain the battery voltage and avoid overcharging, thus improving battery life. A low-dropout voltage regulator further regulates the battery voltage to produce a stable dc voltage. The chip core design has a total area of 1342μm×1011μm. The output of the harvesting system is a regulated 0.9 V supply with 1.05 mA current at full load.

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http://hdl.handle.net/10453/148329