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A 678-MHz Wireless Power Transfer System With Inherent Wireless Phase Shift Cont
提出一种6.78MHz无线电力传输系统，采用差分D类功放和延迟调谐整流器，实现高效无线相位控制。
峰值端到端效率77%，最大输出功率0.9W（3.3V输出）
无线电力传输D类功放延迟调谐整流器相位控制系统集成
▸无线相位控制无需额外片外组件
▸差分D类功放的1X/2X模式宽负载范围效率优化
▸集成化设计消除反馈传感线圈
Abstract
This article presents a 6.78-MHz wireless power
transfer (WPT) system with a differential class-D power amplifier
(PA) for the transmitter (TX) and a delay-tuned rectifier for
the receiver (RX). Besides the RX local voltage regulation,
we propose a fully integrated TX global power regulation with
wireless phase shift control without any extra off-chip compo-
nents. Furthermore, the proposed system eliminates the feedback
data-sensing coil used in prior arts, thus greatly improving the
system integ