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A 0.032-mm2 0.15-V Three-Stage Charge-Pump Scheme Using a Differential Bootstrapped Ring-VCO for Energy-Harvesting Applications
Yi H.1; Yin J.1; Mak P.-I.1; Martins R.P.1
2018-02-01
Source PublicationIEEE Transactions on Circuits and Systems II: Express Briefs
ISSN15497747
Volume65Issue:2Pages:146-150
Abstract

This brief reports a compact and fully integrated three-stage charge-pump (CP) scheme with a 1:10 step-up ratio for energy-harvesting applications. To undertake a low-voltage input (e.g., from thermoelectric or solar source), our CP scheme features a differential bootstrapped ring-VCO generating six-phase clock signals with a boosted swing. Driven by replicas of these swing-boosted clock signals, the entailed number of CP stages is reduced and a 1:10 step-up ratio can be achieved with only a 3-stage CP, resulting in a higher PCE. Using the replicas of the clock signals also reduces substantially the dependency of the clock frequency on the load drivability. Fabricated in 65-nm CMOS, a 0.87-V output voltage is measured at a 38.8% power conversion efficiency, under a 500- k Ω load and a 0.15-V input. The chip area is 0.032 mm.

KeywordBootstrapped Charge Pump (Cp) Cmos Energy Harvesting Reverse Current Ring-vco Ultra-low Voltage
DOI10.1109/TCSII.2017.2676159
URLView the original
Indexed BySCI
Language英语
WOS Research AreaEngineering
WOS SubjectEngineering, Electrical & Electronic
WOS IDWOS:000423551600002
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Citation statistics
Cited Times [WOS]:14   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionINSTITUTE OF MICROELECTRONICS
DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
Corresponding AuthorYin J.; Mak P.-I.; Martins R.P.
Affiliation1.Universidade de Macau
2.Instituto Superior Técnico
Recommended Citation
GB/T 7714
Yi H.,Yin J.,Mak P.-I.,et al. A 0.032-mm2 0.15-V Three-Stage Charge-Pump Scheme Using a Differential Bootstrapped Ring-VCO for Energy-Harvesting Applications[J]. IEEE Transactions on Circuits and Systems II: Express Briefs,2018,65(2):146-150.
APA Yi H.,Yin J.,Mak P.-I.,&Martins R.P..(2018).A 0.032-mm2 0.15-V Three-Stage Charge-Pump Scheme Using a Differential Bootstrapped Ring-VCO for Energy-Harvesting Applications.IEEE Transactions on Circuits and Systems II: Express Briefs,65(2),146-150.
MLA Yi H.,et al."A 0.032-mm2 0.15-V Three-Stage Charge-Pump Scheme Using a Differential Bootstrapped Ring-VCO for Energy-Harvesting Applications".IEEE Transactions on Circuits and Systems II: Express Briefs 65.2(2018):146-150.
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