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A Single-Chip Solar Energy Harvesting IC Using Integrated Photodiodes for Biomedical Implant Applications
Zhiyuan Chen1; Man-Kay Law1; Pui-In Mak1; Rui P. Martins1,2
2017-02
Source PublicationIEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS
ISSN1932-4545
Volume11Issue:1Pages:44-53
Abstract

In this paper, an ultra-compact single-chip solar energy harvesting IC using on-chip solar cell for biomedical implant applications is presented. By employing an on-chip charge pump with parallel connected photodiodes, a 3.5x efficiency improvement can be achieved when compared with the conventional stacked photodiode approach to boost the harvested voltage while preserving a single-chip solution. A photodiode-assisted dual startup circuit (PDSC) is also proposed to improve the area efficiency and increase the startup speed by 77%. By employing an auxiliary charge pump (AQP) using zero threshold voltage (ZVT) devices in parallel with the main charge pump, a low startup voltage of 0.25 V is obtained while minimizing the reversion loss. A 4 V-in gate drive voltage is utilized to reduce the conduction loss. Systematic charge pump and solar cell area optimization is also introduced to improve the energy harvesting efficiency. The proposed system is implemented in a standard 0.18-mu m CMOS technology and occupies an active area of 1.54 mm(2). Measurement results show that the on-chip charge pump can achieve a maximum efficiency of 67%. With an incident power of 1.22 mW/cm(2) from a halogen light source, the proposed energy harvesting IC can deliver an output power of 1.65 mu W at 64% charge pump efficiency. The chip prototype is also verified using in-vitro experiment.

KeywordAuxiliary Charge Pump Charge Pump/solar Cell Area Optimization Photodiode-assisted Dual Startup Circuit Single-chip Solar Energy Harvesting
DOI10.1109/TBCAS.2016.2553152
URLView the original
Indexed BySCI
Language英语
WOS Research AreaEngineering
WOS SubjectEngineering, Biomedical ; Engineering, Electrical & Electronic
WOS IDWOS:000395442500011
PublisherIEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
The Source to ArticleWOS
Fulltext Access
Citation statistics
Cited Times [WOS]:16   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionINSTITUTE OF MICROELECTRONICS
DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
Corresponding AuthorMan-Kay Law
Affiliation1.Univ Macau, State Key Lab Analog & Mixed Signal VLSI, Macau, Peoples R China
2.Univ Macau, FST ECE, Macau, Peoples R China
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. A Single-Chip Solar Energy Harvesting IC Using Integrated Photodiodes for Biomedical Implant Applications[J]. IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS,2017,11(1):44-53.
APA Zhiyuan Chen,Man-Kay Law,Pui-In Mak,&Rui P. Martins.(2017).A Single-Chip Solar Energy Harvesting IC Using Integrated Photodiodes for Biomedical Implant Applications.IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS,11(1),44-53.
MLA Zhiyuan Chen,et al."A Single-Chip Solar Energy Harvesting IC Using Integrated Photodiodes for Biomedical Implant Applications".IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS 11.1(2017):44-53.
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