Structure-Reconfigurable Power Amplifier (SR-PA) and 0X/1X Regulating Rectifier for Adaptive Power Control in Wireless Power Transfer System

Fu Bin Yang, Jonathan Fuh, Yu Hsien Li, Makoto Takamiya, Po-Hung Chen

研究成果: Article同行評審

10 引文 斯高帕斯(Scopus)

摘要

This article presents a 6.78-MHz wireless power transfer system with a structure-reconfigurable power amplifier (SR-PA) and a 0X/1X regulating rectifier. The proposed 0X/1X regulating rectifier with local-loop control achieves voltage rectification and regulation without dc-dc converter usage to improve the receiver efficiency. To further enhance the system efficiency, the proposed SR-PA with global-loop power control adjusts its power-stage structure to realize adaptive power delivery. The transmitter and receiver chips were fabricated in a 0.25-μm CMOS process using 5-V devices, and the resulting system was able to regulate an output voltage of 5 V. The measurement results demonstrated an 11.2% improvement in system efficiency for a light load and a 2.7 times increase in available output power compared with the same system without transmission power control. A measured peak receiver efficiency of 92.9% and a total system efficiency of 71.5% were also demonstrated.

原文English
文章編號9259023
頁(從 - 到)2054 - 2064
頁數11
期刊IEEE Journal of Solid-State Circuits
56
發行號7
DOIs
出版狀態Published - 7月 2021

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