A 2.5nJ Duty-Cycled Bridge-to-Digital Converter Integrated in a 13mm3 Pressure-Sensing System

📋 论文概要

该论文提出了一种采用占空比（duty-cycled）技术的桥式数字转换器，集成在13mm³的压力传感系统中，实现了2.5nJ的超低能耗。解决了传统桥式测量方案功耗高的问题，适用于电池供电的微型传感器节点。

💡 主要创新点

• 采用占空比技术大幅降低桥式数字转换器的功耗，每次转换仅需2.5nJ能量。
• 将转换器与压力传感系统单片集成在13mm³的小体积内，实现微型化低功耗传感节点。

🏷 关键词

📄 原文摘要

piezoresistive MEMS sensors, often configured in a Wheatstone bridge, are widely used to measure physical signals such as pressure [1-3], temperature [4], force [1], and gas concentration. A common method to realize a digital output from the bridge involves biasing the bridge with a DC voltage source and using a low-noise amplifier followed by an ADC. While a bridge measurement can achieve high resolution and linearity, it is very power hungry

👥 作者与机构

Sechang Oh1, Yao Shi1, Gyouho Kim1,2, Yejoong Kim1,2, Taewook Kang1,

Seokhyeon Jeong1,2, Dennis Sylvester1, David Blaauw1 University of Michigan, Ann Arbor, MI; 2CubeWorks, Ann Arbor, MI 1 Small form-factor