A 0.15-V, 44.73% PCE charge pump with CMOS differential ring-VCO for energy harvesting systems

Churchill, Kishore Kumar Pakkirisami and Ramiah, Harikrishnan and Chong, Gabriel and Ahmad, Mohd Yazed and Yin, Jun and Mak, Pui-In and 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). pp. 35-43. ISSN 0925-1030, DOI https://doi.org/10.1007/s10470-021-01980-2.

Full text not available from this repository.


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 M omega with an incremental step of 100 k and 2 M omega, 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 M omega 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.

Item Type: Article
Funders: [IF071-2020], [RK002-2021]
Uncontrolled Keywords: Charge pump; DC-to-DC conversion; Dynamic voltage frequency scaling (DVFS); Energy harvesting; Ring-voltage controlled oscillator (RO)
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering > Department of Electrical Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 15 Aug 2022 00:43
Last Modified: 15 Aug 2022 00:43
URI: http://eprints.um.edu.my/id/eprint/33455

Actions (login required)

View Item View Item