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Fully Integrated Inductor-Less Flipping-Capacitor Rectifier for Piezoelectric Energy Harvesting
Zhiyuan Chen1; Man-Kay Law1; Pui-In Mak1; Wing-Hung Ki2; Rui P. Martins3
2017-12-01
Source PublicationIEEE Journal of Solid-State Circuits
ISSN00189200
Volume52Issue:12Pages:3168-3180
Abstract

This paper presents a fully integrated piezoelectric energy harvesting interface without external components. Instead of relying on bulky external inductors with high quality factor as in the conventional parallel-synchronized-switch harvesting-on-inductor (P-SSHI) approach, we propose a flipping-capacitor rectifier (FCR) topology to achieve voltage inversion of the piezoelectric energy harvester through a reconfigurable capacitor array. This fundamentally preserves a fully integrated solution without inductors while achieving a high-energy extraction capability. Measurement results from FCR using discrete components shows an output power enhancement of up to 3.4 × , which is close to the theoretical prediction. We also fabricated a seven-phase FCR with four MIM capacitors and 21 switches using a 0.18- μm 1.8/3.3/6 V CMOS process, occupying an active area of 1.7 mm. Additionally, we implemented an active rectifier based on a common-gate comparator with phase alignment to ensure high-speed operation while minimizing the diode voltage drop. A phase generate-and-combine circuit eliminates redundant switching activities. Systematic optimization of the three main energy loss mechanisms during the finite flip time: 1) phase offset; 2) incomplete charge transfer; and 3) reduced conduction time, is also introduced. Measurement results show that the output power enhancement can reach up to 4.83 × at an excitation frequency of 110 kHz.

KeywordCmos Deep-tissue Implant Flipping-capacitor Rectifier (Fcr) Fully Integrated High Efficiency Inductor-less Parallel-synchronized-switch Harvesting-on-inductor (P-sshi) Piezoelectric Energy Harvesting Reconfigurable Capacitor Array Ultrasound
DOI10.1109/JSSC.2017.2750329
URLView the original
Indexed BySCI
Language英语
WOS Research AreaEngineering
WOS SubjectEngineering, Electrical & Electronic
WOS IDWOS:000417192200006
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Citation statistics
Cited Times [WOS]:8   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
INSTITUTE OF MICROELECTRONICS
Corresponding AuthorMan-Kay Law
Affiliation1.University of Macau, Macau, China
2.Hong Kong University of Science and Technology, Hong Kong, China
3.Instituto Superior Técnico/Universidade de Lisboa, Lisbon, Portugal
First Author AffilicationUniversity of Macau
Corresponding Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Zhiyuan Chen,Man-Kay Law,Pui-In Mak,et al. Fully Integrated Inductor-Less Flipping-Capacitor Rectifier for Piezoelectric Energy Harvesting[J]. IEEE Journal of Solid-State Circuits,2017,52(12):3168-3180.
APA Zhiyuan Chen,Man-Kay Law,Pui-In Mak,Wing-Hung Ki,&Rui P. Martins.(2017).Fully Integrated Inductor-Less Flipping-Capacitor Rectifier for Piezoelectric Energy Harvesting.IEEE Journal of Solid-State Circuits,52(12),3168-3180.
MLA Zhiyuan Chen,et al."Fully Integrated Inductor-Less Flipping-Capacitor Rectifier for Piezoelectric Energy Harvesting".IEEE Journal of Solid-State Circuits 52.12(2017):3168-3180.
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