一种用于脑电图检测系统的CMOS数字可编程OTA仪表放大器

2015 IEEE International Conference on Electronics, Circuits, and Systems (ICECS) Pub Date : 2015-12-01 DOI:10.1109/ICECS.2015.7440374

S. Mahmoud, Aisha A. Alhammadi

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引用次数: 8

摘要

本文设计了一种基于数字可编程操作跨导放大器(DPOTA)的仪器放大器(IA)，用于脑电图检测系统。所提出的IA由DPOTA级联和数字可编程陀螺仪组成。DPOTA的数字控制电路采用4位码字的分流网络(CDN)实现。PSpice结果采用0.25μm IBM CMOS工艺完成。IA提供中等增益(6.43dB-29.78dB)，考虑输入参考噪声时功耗为13.57μW。通过两个级联的IA实现更高的增益，提供更高的可编程增益(13.81dB-60.15dB)，输入参考噪声为，功耗为27.4μW。结果表明，该方法可以作为脑电系统的第一阶段。

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A CMOS digitally programmable OTA based instrumentation amplifier for EEG detection system

In this paper, the instrumentation amplifier (IA) based on digitally programmable operational transconductance amplifier (DPOTA) is designed for EEG detection system. The proposed IA consists of DPOTA cascaded with a digitally programmable gyrator. The digital control circuit of DPOTA is done using current division network (CDN) for 4-bit code word. PSpice results are done using 0.25μm IBM CMOS process. The IA provides moderate gain (6.43dB-29.78dB), and consumes power by 13.57μW with input referred noise. Higher gain is achieved by two cascaded stages of this IA providing more programmable gain (13.81dB-60.15dB), input referred noise of and power dissipation of 27.4μW. These results show the ability of this IA to be used as first stage in EEG system.

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来源期刊

2015 IEEE International Conference on Electronics, Circuits, and Systems (ICECS)

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