Dual-DLL-Based CMOS All-Digital Temperature Sensor for Microprocessor Thermal Monitoring

📋 论文概要

提出一种基于双DLL的全数字温度传感器，利用温度依赖的逆变器延迟并通过时间数字转换器（TDC）实现温度监测，旨在为微处理器热管理提供低面积、低功耗的片上感测方案。

💡 主要创新点

• 采用双DLL架构，通过比较两个DLL的相位差实现高精度温度测量
• 完全数字实现，无需模拟电路，适合数字工艺集成并降低设计复杂度
• 针对微处理器应用优化，实现低面积开销和低功耗的片上温度监测

🏷 关键词

📄 原文摘要

increasingly need on-chip temperature sensors for thermal and power management [1]. Since these sensors do not take part in the main computing activity but rather play the auxiliary, albeit important, role of temperature monitoring, their presence in terms of area, power, and design effort should be minimal, thus, all-digital sensors are desired. Temperature sensing based on temperature-dependent delays of inverters [2] could be suited for microprocessor applications, as it lends itself to digital implementation: by using a time-to-digital converter (TDC), an inverter delay can be compared to an absolute delay reference and converted to a digital temperature output [2] (Fig. 3.7.1). We report on an all-digital CMOS temperature sensor for microprocessor application, which also exploits temperature-dependent inverter delays within

👥 作者与机构

Kyoungho Woo1, Scott Meninger2, Thucydides Xanthopoulos2,

Ethan Crain2, Dongwan Ha1, Donhee Ham1 1 Harvard University, Cambridge, MA, 2Cavium Networks, Marlborough, MA Today’s microprocessors