0.5µVrms 12µW贴片式织物传感器，用于可穿戴式身体传感器网络

2009 IEEE Asian Solid-State Circuits Conference Pub Date : 2009-12-22 DOI:10.1109/ASSCC.2009.5357190

Long Yan, Jerald Yoo, Binhee Kim, H. Yoo

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引用次数: 6

摘要

提出了一种0.5μVrms、12μW无线供电的贴片式织物传感器，用于可穿戴式人体传感器网络，实现对人体生物电信号的连续监测。用各种金属元件在织物上丝网印刷厚膜电极，并对其阻抗≈100kΩ进行了表征。针对织物传感器优化了2级嵌套斩波模拟读出前端(AFE)，电极参考噪声性能降低了0.5μVrms。10b折叠SAR ADC减小了电容式DAC (CDAC)的尺寸，使ADC驱动器的功率预算降低了94%。织物传感器的系统分辨率为9b, CMRR>106dB。该芯片采用0.18μm CMOS工艺，采用丝网印刷电感(直径为3cm，匝数为4)堆叠的织物传感器，通过电感耦合测量无线传输功率的心电和肌电信号。

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A 0.5µVrms 12µW patch type fabric sensor for wearable body sensor network

A 0.5μVrms, 12μW wirelessly powered patch type fabric sensor is presented for wearable body sensor network to continuously monitor personal bioelectric signals. Thick film electrodes are screen printed on the fabric with various metal components and their impedances of ≈100kΩ are characterized. A 2-stage nested chopped analog readout front end (AFE) is optimized for the fabric sensor with reduced electrode referred noise performance of 0.5μVrms. A 10b folded SAR ADC reduces capacitive DAC (CDAC) size and relaxes the power budget of ADC driver by 94%. The proposed fabric sensor operates with system resolution of 9b and CMRR>106dB. The chip fabricated with 0.18μm CMOS technology, the fabric sensor stacked by screen printed inductor (diameter=3cm and # turns=4) can measure the ECG and EMG signals with wirelessly transmitted power through inductive coupling.

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2009 IEEE Asian Solid-State Circuits Conference

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