A 120nW 18.5kHz RC Oscillator with Comparator Offset Cancellation for ±0.25% Temperature Stability

📋 论文概要

本文提出一种120nW、18.5kHz的RC振荡器，通过比较器失调消除技术实现±0.25%的温度稳定性。该振荡器旨在替代晶振作为无线传感器中休眠模式的定时器，大幅降低功耗并减小尺寸与成本。

💡 主要创新点

• 提出一种比较器失调消除技术，在不增加功耗的前提下显著提高RC振荡器的温度稳定性
• 整体电路采用超低功耗设计，总功耗仅120nW，适合电池供电的物联网设备

🏷 关键词

📄 原文摘要

Anantha P. Chandrakasan1, Gangadhar Burra2 Massachusetts Institute of Technology, Cambridge, MA, Texas Instruments, Dallas, TX, 3MediaTek, Austin, TX 1 2 Integrated low-frequency oscillators can replace crystal oscillators as sleepmode timers to reduce the size and cost of wireless sensors [1]. Since the timer is one of the few continuously functioning circuits, minimizing its power consumption can greatly reduce sleep-mode power of highly duty-cycled systems. Temperature stability of the oscillator is important in order to minimize timing uncertainly and guard time for the radios, and thus maximizing sleep time. The voltage-averaging feedback method described in [2] achieves high stability in the MHz frequencies, but when scaled to the kHz range, requires very large filters. On the other extreme, gate leakage-based timers have been designed for sub-nW power consumption, but operate in the sub-Hz frequencies [3]. In the past, high

👥 作者与机构

Arun Paidimarri1, Danielle Griffith2, Alice Wang3,