A Quadrature Relaxation Oscillator with a ProcessInduced Frequency-Error Compensation Loop

📋 论文概要

该论文提出了一种正交松弛振荡器，并引入工艺引起的频率误差补偿环路，以解决工艺变化导致的频率不准确问题，实现低功耗、高精度的参考频率生成。

💡 主要创新点

• 提出正交松弛振荡器结构，通过正交相位关系降低相位噪声。
• 设计工艺引起的频率误差补偿环路，自动校准频率偏差，无需外部修调。
• 实现超低功耗操作，适用于可穿戴和植入式传感器接口SoC。

🏷 关键词

📄 原文摘要

wearable and implantable technologies, there has been growing demand on development of key enabling circuits for ultra-low-power sensor interface SoCs. As a reference-frequency generation block for clock management of the overall system, the relaxation oscillator has been widely adopted since it can provide a controllable and well-defined untrimmed frequency with low-cost circuits. In the past decade, the major goal in the design of the relaxation oscillators has been the improvement of phase-noise figure-of-merit (FOM) closer to the fundamental limit of 169dBc/Hz [1]. There have been feedback approaches to internally generate reference voltages for comparison, hence compensating the comparator circuit delay [2-4]. Since the delay compensation

👥 作者与机构

Jahyun Koo1, Kyoung-Sik Moon2, Byungsub Kim1, Hong-June Park1, Jae-Yoon Sim1

Pohang University of Science and Technology, Pohang, Korea Research Institute of Industrial Science & Technology, Pohang, Korea 1 2 With the emergence of