A 0.45V 423nW 3.2MHz Multiplying DLL with Leakage-Based Oscillator for Ultra-Low-Power Sensor Platforms

📋 论文概要

提出一种用于超低功耗传感器平台的乘性延迟锁定环（DLL），采用基于漏电流的振荡器实现0.45V供电下423nW功耗和3.2MHz输出频率，解决了自由运行振荡器受工艺影响需后调整的问题。

💡 主要创新点

• 提出基于漏电流的振荡器，利用MOS管亚阈值区漏电流实现极低功耗和频率稳定。
• 采用乘性DLL架构，从低频参考时钟产生高频输出，避免高频振荡器的高功耗。
• 实现0.45V超低电压工作，整体功耗仅423nW，适合能量采集传感器节点。

🏷 关键词

📄 原文摘要

University of Michigan, Ann Arbor, MI 1 2 Emerging demands on ultra-low-power wireless sensor platform have presented challenges for nano-watt design of various circuit components. Clock management unit, as an essential block, is one of the most actively researched blocks. It is required to distribute various frequency ranges for energy-optimal operation, e.g., Hz for internal timer [1], kHz for global clock [2], and MHz for fast data transmission or intensive signal processing [3]. However, free-running oscillators are seriously affected by process variations and should be readjusted by post-fabrication trimming. Though a crystal gives a stable frequency, the use of multiple crystals is generally not allowed by limited form-factor and increased cost. Instead, frequency multiplication from one clean reference is more effective way for higher frequency generation. Considering high-frequency clock is

👥 作者与机构

Dong-Woo Jee1, Dennis Sylvester2, David Blaauw2, Jae-Yoon Sim1

Pohang University of Science and Technology, Pohang, Korea,