JSSC 2006第8期Other90nm

A 5-GHz 20-dBm Power Ampliﬁer With Digitally Assisted AM-PM Correction in a 90-n

本文提出了一种用于校正功率放大器AM-PM失真的数字辅助技术，并在90nm CMOS工艺中实现了5GHz功率放大器。

5GHz, 20dBm, 90nm CMOS, 54Mb/s (64 QAM), 效率提升2.8倍

功率放大器AM-PM失真数字辅助CMOSWLAN

▸使用变容二极管作为调谐电路的一部分来引入相位偏移以抵消AM-PM失真

▸采用前馈方式通过IQ基带数据的幅度控制变容二极管

▸在5GHz WLAN应用的AB类CMOS功率放大器中展示了该技术

Abstract

This paper presents an integrated CMOS power ampliﬁer and a technique for correcting AM-PM distortion in power ampliﬁers. The linearization technique uses a varactor as part of a tuned circuit to introduce a phase shift that counteracts the AM-PM distortion of the power ampliﬁer. The varactor is controlled by the amplitude of the IQ baseband data in a feedfor- ward fashion. The technique has been demonstrated in a 5-GHz class-AB CMOS power ampliﬁer designed for WLAN applications and implemented