A 37µW Dual-Mode Crystal Oscillator for Single-Crystal Radios

📋 论文概要

本文提出一种37µW双模式晶体振荡器，仅使用单个晶体即可同时生成MHz和kHz时钟，从而消除无线传感器节点中通常需要的第二个晶体，降低成本和尺寸。该振荡器适用于单晶体无线电系统，解决了多晶体带来的面积和成本问题。

💡 主要创新点

• 提出双模式操作架构，单个晶体可工作在MHz和kHz两种频率模式，替代传统两个晶体的方案。
• 实现极低功耗37µW，适合电池供电的无线传感器节点，同时保持频率稳定性。

🏷 关键词

📄 原文摘要

reductions in power, cost and size of wireless sensors. Wireless nodes reduce average power by using intermittent data transmission, which is synchronized by a continuously operating sleep timer in each node. In some applications, such as disposable sensors, low cost and small physical size are more important than achieving the lowest possible power consumption. Crystal cost and size is a limitation, particularly because each node requires two crystals. The first crystal, in the MHz range, is used to generate the PLL reference clock. The second crystal, usually 32.768kHz, is used to generate an accurate sleep timer used for synchronizing data transmission. A radio SoC may occupy 4x4mm2 board area while a standard size for each crystal is 3.2x2.5mm2. Therefore, the size of the

👥 作者与机构

Danielle Griffith1, James Murdock1, Per Torstein Røine2, Thomas Murphy1

Texas Instruments, Dallas, TX, 2Texas Instruments, Oslo, Norway 1 The emerging Internet of Things (IoT) market is fueled by