A 0.26mm2 DPD-Less Quadrature Digital Transmitter With <-40dB EVM Over >30dB Pout Range in 65nm CMOS

📋 论文概要

本文提出了一款65nm CMOS工艺下的无数字预失真正交数字发射机，面积仅0.26mm²。通过优化RF DAC架构和数字电路设计，实现了在超过30dB输出功率范围内EVM低于-40dB，解决了传统发射机需要数字预失真且面积大的问题。

💡 主要创新点

• 提出无数字预失真的正交数字发射机架构，利用RF DAC直接数字-射频转换，避免了传统DPD的复杂性和功耗。
• 通过电路设计优化实现0.26mm²的小面积，同时保持宽输出功率范围内的高线性度（EVM<-40dB）。
• 采用65nm CMOS工艺，利用开关特性实现功率随频率和电压缩放，提高效率并适应工艺缩放。

🏷 关键词

📄 原文摘要

based on RF digitalto-analog converters (DAC) are optimal for wireless transmitters in CMOS due to the small chip area, low power consumption, and ability to evolve with scaling of the transistor feature size. A DTX integrates all functions of a conventional transmitter into a single RFDAC that directly converts digital bits to RF signals (Fig. 10.7.1) [1-3]. It consists of digital circuits (e.g., switches, logic gates, etc.) and passive devices rather than traditional mixed-signal, frequency mixing, gain and output stages. Due to switching operation the power scales ∝CV2f, which benefits from CMOS scaling. In this work, a quadrature switched-capacitor (SC) DTX is presented that can achieve <-40dB EVM for >30dB output power (POUT)

👥 作者与机构

Si-Wook Yoo1, Shih-Chang Hung1, Jeffrey S. Walling2, David J. Allstot3, Sang-Min Yoo1

Michigan State University, East Lansing, MI University of Utah, Salt Lake City, UT 3 Oregon State University, Corvallis, OR 1 2 Digital transmitters (DTX) or digital power amplifiers (DPA)