A 135fsrms-Jitter 0.6-to-7.7GHz LO Generator Using a Single LC-VCO-Based Subsampling PLL and a Ring-Oscillator-Based Sub-Integer-N Frequency Multiplier

📋 论文概要

本文提出了一种基于单LC-VCO的亚采样PLL和环形振荡器子采样的LO发生器，覆盖0.6至7.7GHz频率范围，实现了135fsrms的抖动性能，解决了5G FR1全频段LO生成的高效设计挑战。

💡 主要创新点

• 采用单LC-VCO亚采样PLL结合环形振荡器子采样架构，实现宽频率范围覆盖。
• 通过优化环路设计和噪声抑制技术，在宽频带内保持低抖动性能。

🏷 关键词

📄 原文摘要

bands are still the primary spectrum for 5G communications due to their natural advantages, such as higher compatibility/interoperability with existing networks and better properties for radio transmission. To fully utilize the entire FR1 spectrum, the efficient design of an LO generator based on the meticulous plan for LO frequencies, fLOs, is essential but very challenging. The first challenge is the ever-expanding range of FR1 (top of Fig. 4.2.1). In recent standards, FR1 is defined to cover the new-radio (NR) bands up to 7.1GHz while still including sub-GHz existing bands. Second, LO generators should achieve very low IPN (integrated phase noise (PN)) to support high-order QAMs. To achieve IPN below -43dBc for 256-QAM, the rms jitter should be below 200fs in the upper-frequency bands.

👥 作者与机构

Yongwoo Jo*, Juyeop Kim*, Yuhwan Shin, Chanwoong Hwang, Hangi Park, Jaehyouk Choi

Korea Advanced Institute of Science and Technology, Daejeon, Korea *Equally Credited Authors (ECAs) Despite the growing use of mm-wave bands, FR1