A 95μW 24MHz Digitally Controlled Crystal Oscillator for IoT Applications with 36nJ Start-Up Energy and >13× Start-Up Time Reduction Using A FullyAutonomous Dynamically-Adjusted Load

📋 论文概要

该论文提出了一种用于物联网应用的低功耗24MHz数字控制晶体振荡器，通过快速启动技术解决了传统晶体振荡器启动时间过长导致的高功耗问题。

💡 主要创新点

• 提出了一种数字控制晶体振荡器架构，实现了36nJ的启动能量和超过13倍的启动时间缩短。
• 通过优化电路设计和控制算法，在95μW的低功耗下实现了24MHz的稳定时钟输出。

🏷 关键词

📄 原文摘要

g., Bluetooth Low Energy, BLE) rely on heavily duty-cycling the wireless transceivers to reduce the overall system power consumption [1]. This requires swift start-up behavior of the transceiver. The crystal oscillator (XO) generates a stable reference clock for the PLL to synthesize a carrier and to derive clocks for all other parts of the transceiver SoC, e.g., ADC and the digital baseband. The typical start-up time (Ts) of an XO is relatively long (~ms) due to a high quality factor of the crystal quartz. This leads to a significant (up to 30%) power overhead for a highly duty-cycled transceiver with a short packet format, e.g., the packet length is as short as 128μs in BLE (Fig. 5.3.1). A reduction of Ts of the XO is necessary, at the same time, the power

👥 作者与机构

Ming Ding, Yao-Hong Liu, Yan Zhang, Chuang Lu, Peng Zhang,

Benjamin Busze, Christian Bachmann, Kathleen Philips Holst Centre / imec, Eindhoven, The Netherlands Wireless sensor nodes (WSN) in IoT applications (e