A 16MHz XO with 17.5µs Startup Time Under 104ppm-∆F Injection Using Automatic Phase-Error Correction Technique

📋 论文概要

本文提出一种自动相位误差校正技术，用于16MHz晶体振荡器的快速启动，在104ppm频率失配下实现17.5微秒的启动时间。该技术解决了传统注入锁定在频率失配较大时效率低的问题，适用于低功耗物联网应用中占空比系统的快速唤醒。

💡 主要创新点

• 提出自动相位误差校正技术，动态调整注入相位以补偿频率失配，使启动时间在104ppm失配下仍保持短至17.5微秒。
• 采用新型电路架构在注入过程中实时监测并校正相位误差，无需额外校准或数字辅助，降低了功耗和复杂度。

🏷 关键词

📄 原文摘要

significantly influenced the power consumption of duty-cycled Internet-of-Things (IoT) systems. The injection techniques [1-5] have gained popularity for effectively reducing the start-up time and start-up energy (ES) of XOs. Nonetheless, high-efficiency injection is guaranteed only when the frequency mismatch (∆F) between the injection frequency (FINJ) and the XO frequency (FXO) is less than 5000ppm for conventional injection. For best results, ∆F should be within 2500ppm [1]. As shown in Fig. 3.7.1, for each ∆F, there exists a corresponding maximum motional current (iM), e.g., 65%A for 5000ppm. This is the limitation to the energy injection and TS reduction, especially for large ∆F. Since small ∆F is difficult to achieve across PVT with on-chip oscillators, it is necessary to develop

👥 作者与机构

Zhikuang Cai1, Xin Wang1, Zixuan Wang1, Yunjin Yin1, Wenjing Zhang1,

Tailong Xu2, Yufeng Guo1 Nanjing University of Posts and Telecommunications, Nanjing, China Hefei University, Hefei, China 1 2 The start-up time (TS) of MHz crystal oscillators (XOs) has