A 1.4V 10.5MHz Swing-Boosted Differential Relaxation Oscillator with 162.1dBc/Hz FOM and 9.86psrms Period Jitter in 0.18μm CMOS

📋 论文概要

本文提出了一种摆动增强的差分松弛振荡器，通过改进电路结构提高了相位噪声性能，在1.4V电压下实现了10.5MHz频率、162.1dBc/Hz的FOM和9.86psrms的周期抖动。该设计解决了松弛振荡器相位噪声性能落后于环形振荡器的问题。

💡 主要创新点

• 采用摆动增强技术提升差分松弛振荡器的输出电压摆幅，从而改善相位噪声。
• 通过差分结构设计抑制共模噪声和电源噪声，进一步降低抖动。

🏷 关键词

📄 原文摘要

Daegu Gyeongbuk Institute of Science and Technology, Daegu, Korea, 3 Nanyang Technological University, Singapore, Singapore 1 2 Relaxation oscillators have a profound scope as on-chip reference clock sources or sensor front-ends in comparison to ring oscillators due to their superior frequency stability, control linearity, and wide tuning range. However, despite a better fundamental limit predicted in theory, the phase noise performance of relaxation oscillators trails behind that of ring oscillators. Furthermore, there is a huge gap between the maximum achievable 1/f2 phase noise FOM (169dBc/Hz)

👥 作者与机构

Junghyup Lee1, Arup George1,2,3, Minkyu Je2

Institute of Microelectronics, Singapore, Singapore,