A 5.3GHz 16b 1.75GS/s Wideband RF Mixing-DAC Achieving IMD<-82dBc up to 1.9GHz

📋 论文概要

本文提出一种5.3GHz时钟、16位分辨率、1.75GS/s采样率的宽带RF混合DAC，集成了混频器和DAC功能，解决了传统电流舵DAC在高输出频率下线性度下降的问题，实现了在高达1.9GHz输出频率下IMD低于-82dBc的高线性度性能。

💡 主要创新点

• 采用Mixing-DAC架构将混频器与DAC集成，避免了单独混频器引入的额外功耗和面积开销，同时实现宽带高线性度。
• 在1.75GS/s高采样率下，通过电路设计优化实现了高达5.3GHz的时钟频率和1.9GHz输出频率下IMD<-82dBc的极低失真性能。

🏷 关键词

📄 原文摘要

infrastructure require both high linearity and large bandwidth (BW) at GHz frequencies. The combination of multicarrier GSM, WCDMA and LTE typically requires IMD<-80dBc and SFDR>80dBc in a large transmit bandwidth of 300MHz and at an output frequency of up to 3.5GHz and beyond. Current-Steering (CS) Nyquist DACs have large BW, but their linearity drops for increasing output frequencies [1]. A separate mixer is therefore needed to generate an RF signal with high linearity. A Mixing-DAC integrates the function of the mixer and DAC together. Using a Mixing-DAC can result in different architecture trade-offs which potentially enable a reduction of the cost and power consumption, while improving the linearity at high frequencies. The state-of-the-art Mixing-DACs attain linearity by

👥 作者与机构

Elbert Bechthum1, Georgi Radulov1, J. Briaire2, Govert Geelen2, Arthur van Roermund1

Eindhoven University of Technology, Eindhoven, The Netherlands 2 Integrated Device Technology, Eindhoven, The Netherlands 1 Cellular multicarrier transmitters for communication