A 13-Channel 1.53-mW 11.28-mm2 Electrical Impedance Tomography SoC Based on Frequency Division Multiplexing with 10× Throughput Reduction

📋 论文概要

该论文提出了一款基于频分复用（FDM）的13通道电学阻抗断层成像（EIT）SoC，采用早期解调技术以降低模拟前端带宽要求并抑制运动伪影和直流偏移，实现了1.53mW的低功耗和11.28mm²的小面积。

💡 主要创新点

• 采用频分复用（FDM）替代传统时分复用（TDM），支持多通道并行读取，提高吞吐率。
• 引入早期解调技术，在模拟前端早期进行解调，从而放宽带宽要求并减小运动伪影和电极接口直流偏移的影响。

🏷 关键词

📄 原文摘要

has been reported as the only viable wearable real-time method for lung imaging [1]. Previous EIT chips generally employ Time-Division Multiplexing (TDM) or as active electrode to facilitate multichannel read-out [2-4], and support a large number of electrodes by sharing a maximum of 6 parallel readout channels per chip. In this paper, we present an EIT-SoC with the following features: 1) early demodulation to relax the bandwidth requirement of the analog front-end, and minimize the impact of motion artifact and DC offset generated at the skin-electrode interface; 2) Frequency-Division Multiplexing (FDM) to combine 13 pairs of I/Q signals into 2 data streams for quantization by 2 ΔΣ Modulators (DSMs); 3) throughput reduction at a

👥 作者与机构

Boxiao Liu1,2, Guoxing Wang1, Yongfu Li1, Hui Li1, Yue Gao1, Lei Zeng2,

Yixin Ma1, Yong Lian1, Chun Huat Heng2 Shanghai Jiao Tong University, Shanghai, China National University of Singapore, Singapore, Singapore 1 2 Electrical-impedance tomography (EIT)