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A 0.15-V, 44.73% PCE charge pump with CMOS differential ring-VCO for energy harvesting systems
Pakkirisami Churchill, Kishore Kumar1; Ramiah, Harikrishnan1; Chong, Gabriel1; Ahmad, Mohd Yazed2; Yin, Jun3; Mak, Pui In4; Martins, Rui P.4,5
2022-04-01
Source PublicationAnalog Integrated Circuits and Signal Processing
ISSN0925-1030
Volume111Issue:1Pages:35-43
Abstract

This paper proposes a dynamic voltage frequency scaling technique (DVFS) for a CMOS differential bootstrapped ring-voltage controlled oscillator (DBRO), implemented in a 3-stage cross-coupled charge pump (CC-CP), for energy harvesting (EH) applications. A circuit applying this technique known as split input-supply, fabricated in the 130-nm CMOS, compares a signal with an input range of 0.15–0.5 V along with a load of 100 k–1 MΩ with an incremental step of 100 k and 2 MΩ, respectively. The technique allows the DVFS-DBRO to operate with optimum frequency and lower power consumption, which improves the power conversion efficiency (PCE) as well as establishes a wide energy harvesting range. The circuit observes a 44.73% of PCE with 0.15 V input voltage when driving a 2 MΩ load. DVFS also offers a twofold clock boosting of the input voltage without the voltage scaling effect, which improves the charge-pump conduction at low input voltage and allows a gate-to-source input voltage of 0.5 V. These characteristics improve the robustness of the proposed technique and exhibits great potential for a wide input range of EH applications.

KeywordCharge Pump Dc-to-dc Conversion Dynamic Voltage Frequency Scaling (Dvfs) Energy Harvesting Ring-voltage ContRolled Oscillator (Ro)
DOI10.1007/s10470-021-01980-2
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaComputer Science ; Engineering
WOS SubjectComputer Science, Hardware & Architecture ; Engineering, Electrical & Electronic
WOS IDWOS:000749240400001
Scopus ID2-s2.0-85123577388
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Citation statistics
Document TypeJournal article
CollectionTHE STATE KEY LABORATORY OF ANALOG AND MIXED-SIGNAL VLSI (UNIVERSITY OF MACAU)
Faculty of Science and Technology
INSTITUTE OF MICROELECTRONICS
DEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
Corresponding AuthorRamiah, Harikrishnan
Affiliation1.Department of Electrical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, 50603, Malaysia
2.Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, 50603, Malaysia
3.State-Key Laboratory of Analog and Mixed-Signal VLSI/IME, University of Macau, Macao
4.State-Key Laboratory of Analog and Mixed-Signal VLSI/IME, and Faculty of Science and Technology - ECE, University of Macau, Macao
5.Instituto Superior Técnico, Universidade de Lisboa, Lisbson, Portugal
Recommended Citation
GB/T 7714
Pakkirisami Churchill, Kishore Kumar,Ramiah, Harikrishnan,Chong, Gabriel,et al. A 0.15-V, 44.73% PCE charge pump with CMOS differential ring-VCO for energy harvesting systems[J]. Analog Integrated Circuits and Signal Processing, 2022, 111(1), 35-43.
APA Pakkirisami Churchill, Kishore Kumar., Ramiah, Harikrishnan., Chong, Gabriel., Ahmad, Mohd Yazed., Yin, Jun., Mak, Pui In., & Martins, Rui P. (2022). A 0.15-V, 44.73% PCE charge pump with CMOS differential ring-VCO for energy harvesting systems. Analog Integrated Circuits and Signal Processing, 111(1), 35-43.
MLA Pakkirisami Churchill, Kishore Kumar,et al."A 0.15-V, 44.73% PCE charge pump with CMOS differential ring-VCO for energy harvesting systems".Analog Integrated Circuits and Signal Processing 111.1(2022):35-43.
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