A 140fsrms-Jitter and -72dBc-Reference-Spur Ring-VCOBased Injection-Locked Clock Multiplier Using a Background Triple-Point Frequency/Phase/Slope Calibrator

📋 论文概要

该论文提出了一种基于环形VCO的注入锁定时钟倍频器，通过背景三重校准技术解决了PVT变化导致的抖动性能退化问题，实现了140fsrms的抖动和-72dBc的参考杂散。

💡 主要创新点

• 提出了一种背景三重校准技术，连续调整VCO的自由振荡频率以接近目标频率，从而在PVT变化下保持超低抖动。
• 采用环形VCO实现了低抖动和高频信号生成，同时避免了LC振荡器的大面积和高功耗。

🏷 关键词

📄 原文摘要

generate low-jitter high-frequency signals, while using a ring VCO. In the sense that the VCO jitter is removed periodically by the reference clock, SREF, an MDLL also can be considered to be an ILCM. However, the most critical problem of ILCMs is that their jitter performance can degrade easily due to PVT. To ensure ultra-low jitter robustly, ILCMs must be equipped with background calibration that continuously adjusts the free-running frequency of the VCO, fVCO, to stay close to the target frequency, NfREF, where N is the multiplication factor and fREF is the frequency of SREF, thereby minimizing the frequency error. To date, various calibrating methods have been developed, and many of them [1-4] successfully tracked fVCO and prevented the degradation in random jitter, but none of the ILCMs succeeded in

👥 作者与机构

Seyeon Yoo, Seojin Choi, Yongsun Lee, Taeho Seong, Younghyun Lim, Jaehyouk Choi

Ulsan National Institute of Science and Technology, Ulsan, Korea An injection-locked clock multiplier (ILCM) is one of the best options to