JSSC 2015第5期RF & Wireless65nmPower Amplifier

Design of A Transformer-Based Reconﬁgurable Digital Polar Doherty Power Ampliﬁer

本文设计了一种基于变压器的可重构数字极坐标Doherty功率放大器，采用65nm CMOS工艺，实现了高输出功率和效率。

65nm CMOS, +27.3 dBm峰值输出功率, 32.5%峰值效率, 2.1 mm²面积, 24.9%带宽

数字极坐标Doherty功率放大器变压器可重构性CMOS工艺

▸数字极坐标Doherty架构优化主辅放大器协作

▸变压器实现超紧凑设计和宽带性能

▸现场可重构性提供鲁棒操作和灵活优化

Abstract

This paper presents a digital polar Doherty power ampliﬁer (PA) fully integrated in a 65 nm bulk CMOS process. It achieves +27.3 dBm peak output power and 32.5% peak PA drain efﬁciency at 3.82 GHz and 3.60 GHz, respectively. The proposed digital Doherty PA architecture optimizes the cooperation of the main and auxiliary ampliﬁers and achieves superior back-off efﬁciency enhancement (a maxi mum 47.9% improvement versus the corresponding Class-B operati on). This digital intensive ar- chitecture a