JSSC 2021第7期RF & Wireless0.25µm CMOS

Structure-Reconﬁgurable Power Ampliﬁer SR-PA and 0X1X Regulating Rectiﬁer for Ad

提出一种6.78MHz无线功率传输系统，采用结构可重构功放和0X/1X调节整流器以提高效率。

5V输出，峰值接收效率92.9%，系统总效率71.5%

无线功率传输结构可重构功放调节整流器高效率6.78MHz

▸创新点1：结构可重构功率放大器(SR-PA)采用全局环路功率控制，动态调整功率级结构以实现自适应功率传输，显著提升系统效率（轻载时效率提升11.2%）

▸创新点2：0X/1X调节整流器通过本地环路控制实现电压整流与调节，无需DC-DC转换器，使接收端效率峰值达到92.9%，减少了传统架构的功率损耗

▸创新点3：系统级创新通过SR-PA与0X/1X整流器的协同设计，输出功率提升2.7倍，整体系统效率达71.5%，解决了无线供电中动态负载适配问题

▸创新点4：采用5V CMOS工艺集成设计，通过高压器件优化实现了6.78MHz高频下的高效能量传输，降低了系统复杂性与成本

Abstract

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 recti- ﬁcation 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 transmitt