An Integrated Analog Readout for Multi-Frequency Bioimpedance Measurements
An Integrated Analog Readout for Multi-Frequency Bioimpedance Measurements
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DOI：
10.1109/jsen.2014.2315963
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发表时间：
2014-08
影响因子：
4.3
通讯作者：
P. Kassanos;L. Constantinou;I. Triantis;A. Demosthenous
中科院分区：
文献类型：
--
作者：
P. Kassanos;L. Constantinou;I. Triantis;A. Demosthenous
生物阻抗谱广泛用于生物医学应用。本文提出了一种集成模拟读出器，它采用同步检测来执行恒电流多通道、多频率生物阻抗测量。该电路采用 0.35 μm CMOS 技术制造，面积为 1.52 mm2。研究了随机直流偏移的影响，并使用斩波将其最小化。对已知 RC 负载和皮肤的阻抗测量（使用市售电极）演示了系统在高达 1 MHz 的频率范围内的运行情况。该电路采用 ±2.5V 电源供电，每通道功耗为 3.4mW。
Bioimpedance spectroscopy is used in a wide range of biomedical applications. This paper presents an integrated analog readout, which employs synchronous detection to perform galvanostatic multi-channel, multi-frequency bioimpedance measurements. The circuit was fabricated in a 0.35-μm CMOS technology and occupies an area of 1.52 mm2. The effect of random dc offsets is investigated, along with the use of chopping to minimize them. Impedance measurements of a known RC load and skin (using commercially available electrodes) demonstrate the operation of the system over a frequency range up to 1 MHz. The circuit operates from a ±2.5 V power supply and has a power consumption of 3.4-mW per channel.