← 返回 JSSC 论文列表JSSC 2021第7期RF & Wireless65nmPower Amplifier
A Quadrature Class-G Complex-Domain Doherty Digital Power Amplifier Shih-Chang Hu
提出一种基于复杂域Doherty架构的高效正交数字功率放大器，结合Class-G技术提升效率。
27.8-dBm峰值输出功率，32.1%峰值系统效率，-42.0 dB EVM
数字功率放大器复杂域DohertyClass-G开关电容高效率
▸创新点1：复杂域Doherty架构（CDD）通过两个独立向量在复域实现高效功率放大，引入额外效率峰值，显著提升系统效率（SE）和功率回退（PBO）性能。
▸创新点2：双电源Class-G技术通过动态切换电源电压，优化功率放大器的效率，尤其在低功率输出时表现优异，进一步降低能耗。
▸创新点3：开关电容功率放大器（SCPA）结合CDD和Class-G技术，实现高效率和高线性度，支持复杂调制信号如1024-QAM OFDM，峰值效率达32.1%。
▸创新点4：该设计在65nm CMOS工艺中实现，展示了高集成度和低功耗特性，适用于现代无线通信系统，如802.11ax。
Abstract
This article presents an efficient quadrature digital
power amplifier (DPA) based on a complex-domain Doherty
(CDD) architecture. The proposed CDD architecture allows a
PA to achieve high efficiency through Doherty operation in a
complex domain using two independent vectors with different
amplitudes and phases. It demonstrates high efficiency when two
vectors have in-phase components in the complex domain by
introducing an additional efficiency peak. The proposed DPA
based on a switch-capacitor PA (S