An ultra‐low‐power, low‐noise tunable electrocardiogram amplifier,International Journal of Circuit Theory and Applications

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An ultra‐low‐power, low‐noise tunable electrocardiogram amplifier
International Journal of Circuit Theory and Applications ( IF 1.8 ) Pub Date : 2020-08-31 , DOI: 10.1002/cta.2867
Farida Saeidian ₁ , Mohammadreza Ashraf ₁

Affiliation

The objective of this research work is to propose an innovative low‐power, low‐noise, tunable three‐stage capacitive instrumentation amplifier, capable of receiving and magnifying the electrocardiogram (ECG) signals. This is done by adding an extra stage to the second stage of the conventional capacitive instrumentation amplifier. The results show similar midband gain with lesser capacitor usage and smaller chip occupancy area with provision of concurrent tunable gain and bandwidth. The proposed amplifier is designed and implemented using TSMC 0.18‐μm CMOS technology scale under a 1‐V supply voltage with the simulation process carried out using Cadence Virtuoso tool. Post‐layout simulation results show that the amplifier has a tunable midband gain of 55 to 65.6 dB, low‐cutoff frequency tuned from 377 mHz to 4.5 Hz and high‐cutoff frequency tuned from 86.8 to 263.6 Hz. The simulated value of the input‐referred noise and noise efficiency factor (NEF) of the amplifier are 9.6 μV_rms and 6.1, respectively, with the total power consumption of 71.2 nW.

中文翻译：

超低功耗，低噪声可调心电图放大器

这项研究工作的目的是提出一种创新的低功耗，低噪声，可调谐三级电容式仪表放大器，该放大器能够接收和放大心电图（ECG）信号。这是通过在常规电容式仪表放大器的第二级中增加一个额外的级来实现的。结果显示相似的中频带增益，具有较少的电容器使用量和较小的芯片占用面积，同时提供了可调增益和带宽。拟议的放大器是使用TSMC0.18μmCMOS技术规模在1V电源电压下设计和实现的，并使用Cadence Virtuoso工具进行了仿真过程。布局后的仿真结果表明，该放大器具有55至65.6 dB的可调中频带增益，低截止频率从377 mHz调谐至4。5 Hz，高截止频率从86.8调整为263.6 Hz。放大器的输入参考噪声和噪声效率因子（NEF）的仿真值为9.6μV_rms和6.1，总功耗为71.2 nW。

更新日期：2020-11-06

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