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A Symbol-Based Power-Tracking Supply Modulator Integrated With a 28-GHz CMOS PA
提出一种基于符号功率追踪的电源调制器与28GHz CMOS PA集成方案，提升5G NR FR2频段能效。
28nm CMOS, 400MHz 5G FR2 64QAM信号支持, 20ns/V转换速度
5G NR包络跟踪功率放大器CMOS电源调制器
▸符号功率追踪(SPT)技术
▸单电感多输出(SIMO)DC-DC转换器
▸SPT自适应偏置方案
Abstract
This article presents a supply-modulated power
amplifier (PA) system architecture for a high-e fficiency transmit-
ter (TX) that utilizes a symbol-power-tracking (SPT) technique
to support 5G new radio (NR) frequency range 2 (FR2) bands.
Conventional analog envelope tracking (ET) supply modulators
(SMs) su ffer from limited supportable bandwidth due to a
decoupling capacitor required at the PA supply node, which
makes loop compensation di fficult. As a result, analog ET
techniques often require comple