A Multimodal Biosensing System-on-Chip with Integrated Wireless Transceiver and Power Management for Stress Monitoring

📋 论文概要

该论文提出了一款高度集成的多模态生物传感系统芯片，集成了ECG、PPG、GSR和ECH信号采集电路，以及无线收发器和电源管理单元，用于心理压力监测。芯片在0.18μm CMOS工艺下实现了低功耗、高精度的生物信号采集，并解决了多模态传感与无线通信的集成难题。

💡 主要创新点

• 提出了一种共享ECG/ECH的模拟前端，实现了0.32μVrms的输入参考噪声和130dB的共模抑制比。
• PPG电路采用预充电方案，达到了113.9dB的动态范围。
• GSR模拟前端实现了99dB的动态范围和3.1pArms的输入参考噪声。

🏷 关键词

📄 原文摘要

Abstract A highly integrated SoC incorporates ECG, PPG, GSR, and ECH biosignal acquisition interface circuits with a 920MHz, 2kb/s, 1.1µW WuRx, a 2.4GHz, 1Mb/s Tx, and a PMU with <5μs recovery time under 600μA-to-50mA load steps in 0.18µm CMOS. A shared ECG/ECH AFE reaches 0.32µVrms IRN and 130dB CMRR. The PPG circuits attain a 113.9dB DR using a precharge scheme, while the GSR AFE achieves a 99dB DR with 3.1pArms IRN. The biosensing interface consumes only 125.8µW. Psychological stress monitoring (PSM) has emerged as a critical challenge in modern health assessment. Fingers are an ideal sensing site due to their high gland density [1], strong sympathetic responsiveness [2], and convenient accessibility for bio-signal acquisition.

👥 作者与机构

Min-Hua Chang*1, Lin Chou*1, Yen-Jen Liu1, Chen-Hsing Hsu1, Ying-Yu Yang1, Bo-Cheng Juan1, Guan-Yu Lin1, Yi-Jie Lin1, Yao-Wei Huang1, Nitish Kumar2,

Shu-Ping Lin2, Yu-Te Liao1 National Yang Ming Chiao Tung University, Hsinchu, Taiwan, 2National Chung Hsing University, Taichung, Taiwan *Equally Credited Authors (ECAs) 1