A 0.7pF-to-10nF Fully Digital Capacitance-to-Digital Converter Using Iterative Delay-Chain Discharge

📋 论文概要

该论文提出了一种全数字电容数字转换器（CDC），通过迭代延迟链放电技术实现0.7pF至10nF的宽电容测量范围，无需传统的模拟放大器或ADC，从而降低功耗和设计复杂度。适用于低功耗无线传感器系统。

💡 主要创新点

• 提出全数字架构，利用迭代延迟链放电直接测量电容，避免使用模拟电路如放大器与ADC。
• 实现超宽电容测量范围（0.7pF至10nF），适应多种传感器应用。
• 通过迭代放电技术提高测量精度，同时保持极低功耗。

🏷 关键词

📄 原文摘要

various physical quantities, including position, pressure, and concentration of certain chemicals [1-6]. Integrating capacitive sensors into a small wireless sensor system is challenging due to their large power consumption relative to the total system power/energy budget, which can be as low as a few nW [4]. Typical capacitance-to-digital converters (CDCs) use charge sharing or charge transfer between capacitors to convert the sampled capacitance to voltage, which is then measured with an ADC [1-6]. This approach requires complex analog circuits, such as amplifiers and ADCs, increasing design complexity and often increasing power consumption. Moreover, the initial capacitance to voltage conversion essentially limits the input capacitance range because of output voltage saturation. This paper

👥 作者与机构

Wanyeong Jung, Seokhyeon Jeong, Sechang Oh,

Dennis Sylvester, David Blaauw University of Michigan, Ann Arbor, MI Capacitance sensors are widely used to measure