A Two-Electrode Bio-Impedance Readout IC with ComplexDomain Noise-Correlated Baseline Cancellation Supporting Sinusoidal Excitation

📋 论文概要

该论文提出了一种采用复域噪声相关基线消除技术的两电极生物阻抗读出IC，解决了传统两电极配置中电极阻抗和电流发生器噪声引起的基线过大问题，支持正弦波激励。

💡 主要创新点

• 采用复域噪声相关基线消除技术，同时抵消阻抗实部和虚部的基线成分，有效抑制噪声。
• 集成高精度电流发生器，支持正弦波激励，适用于可穿戴阻抗监测。
• 通过两电极配置最小化设备尺寸，满足日常生理信号监测需求。

🏷 关键词

📄 原文摘要

As the demand for daily monitoring of physiological signals increases, the trend towards minimizing the size of devices through a two-electrode configuration has emerged as a new standard for wearable impedance monitoring. However, the two-electrode impedance measurement configuration suffers from its large baseline, further increased by the electrode impedance and the amplified noise of the current generator (CG). These challenges have been addressed by real-domain noise-correlated baseline cancellation (BC) techniques [1–3] (Fig. 33.8.1 (top)). It performs baseline subtraction using an IDAC, whose current is correlated with the current from the CG, at the front-end currentbalancing instrumentation amplifier (CBIA). This method operates well with square-wave

👥 作者与机构

Song-I Cheon*1, Haidam Choi*1, Gichan Yun1, Sein Oh1, Ji-Hoon Suh1,

Sohmyung Ha2, Minkyu Je1 Korea Advanced Institute of Science and Technology, Daejeon, Korea New York University Abu Dhabi, Abu Dhabi, United Arab Emirates *Equally Credited Authors (ECAs) 1 2