Efficiency Improvement in Photovoltaic-Assisted CMOS Rectifier with Symmetric and Voltage-Boost PV-Cells

被引：5

作者：

Kotani, Koji ^{[1
]}

机构：

[1] Tohoku Univ, Dept Elect Engn, Sendai, Miyagi 9808579, Japan

来源：

IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES | 2015年 / E98A卷 / 02期

关键词：

energy harvesting; rectifier; photovoltaic cell; CIRCUIT;

D O I：

10.1587/transfun.E98.A.500

中图分类号：

TP3 [计算技术、计算机技术];

学科分类号：

0812 ;

摘要：

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 MOS-FETs 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 k Omega output loading conditions, being 3.6 times larger than a conventional rectifier without PV assistance.

引用

页码：500 / 507

页数：8

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