Efficiency improvement in photovoltaic-assisted CMOS rectifier with symmetric and voltage-boost PV-cells

Koji Kotani

doi:10.1587/transfun.E98.A.500

Efficiency improvement in photovoltaic-assisted CMOS rectifier with symmetric and voltage-boost PV-cells

Koji Kotani

ENG - Electronic Engineering

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Efficiency of the photovoltaic-assisted UHF CMOS rectifier, which is one example realization of the synergistic ambient energy harvesting concept, has been improved by symmetric PV cell structure. Balanced biasing for the n-channel and p-channel diode-connected MOSFETs realized by the symmetric PV cells effectively compensates Vths and prevents useless leakage current, resulting in the improved efficiency of the rectifier under low input power conditions. In addition, by extending the balanced biasing concept, output-voltage-boosted PV cell structure was proposed and found to be effective for further improving the efficiency of the rectifier. As a result, under a typical indoor lighting condition of 300 lx, power conversion efficiency of 25.4% was achieved at -20 dBm of 920MHz RF input and 47 kΩ output loading conditions, being 3.6 times larger than a conventional rectifier without PV assistance.

Original language	English
Pages (from-to)	500-507
Number of pages	8
Journal	IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
Volume	E98A
Issue number	2
DOIs	https://doi.org/10.1587/transfun.E98.A.500
Publication status	Published - 2015 Feb 1

Keywords

Energy harvesting
Photovoltaic cell
Rectifier

ASJC Scopus subject areas

Signal Processing
Computer Graphics and Computer-Aided Design
Electrical and Electronic Engineering
Applied Mathematics

Access to Document

10.1587/transfun.E98.A.500

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