A Time-Division Multiplexed 8-Channel Non-Contact ECG Recording IC with a Common-Mode Interference Tolerance of 20VPP

📋 论文概要

本文提出了一款8通道非接触式心电图记录芯片，采用时分复用技术，能够耐受高达20Vpp的共模干扰，解决了长期穿戴式ECG监测中环境干扰导致的信号质量下降问题。

💡 主要创新点

• 采用时分复用架构实现8通道非接触式ECG记录，减少通道间串扰并降低功耗。
• 设计了高共模干扰耐受电路，可抑制20Vpp的共模干扰，提升复杂环境下的信号采集可靠性。

🏷 关键词

📄 原文摘要

There has been increasing demand for a low-power wearable device to perform longterm ambulatory monitoring of electrocardiogram (ECG). However, for a wearable device to be a convenient continuous recording system in one’s daily routine, technical issues in ECG become more important. First, long-term monitoring should be robust against massive environmental interference. The interference affects the device in the form of common-mode interference (CMI) caused by coupled disturbances from surrounding powerlines. Common-mode charging/discharging at the input stage has been proposed in 2-electrode systems using switched capacitors [1] and current sources [2] to provide the effective function of a driven-right-leg (DRL) circuit. Second, the device is required to have a high input impedance for high sensitivity. However, there are a few factors that eventually lower the input impedance. A large parasitic capacitance associated with the input path of the instrumentation amplifier (IA)

👥 作者与机构

Kyu-Jin Choi, Jae-Yoon Sim

Pohang University of Science and Technology, Pohang, Korea