Low-noise low-power front-end logarithmic amplifier for neural recording system

被引：8

作者：

Derafshi, Zahra Haddad ^{[1
]}

Frounchi, Javad ^{[1
]}

机构：

[1] Univ Tabriz, Microelect & Microsensor Res Lab, Tabriz, Iran

来源：

INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS | 2014年 / 42卷 / 05期

关键词：

low noise; low power; neural recording system; linear limit logarithmic amplifier; neural signals; ARRAY;

D O I：

10.1002/cta.1861

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this work, a low-power, low-noise logarithmic preamplifier for biopotential and neural recording application is presented. The amplifier is based on a linear limit logarithmic amplifier technique, and an active filter as a DC cancellation filter has been included to its input in order to eliminate DC offsets, which are produced at the electrode-tissue interface. This system has been simulated in a UMC standard 90-nm 1P9M CMOS process. Five dual gain stages are used to produce the required linear limit logarithmic amplifier. The dynamic range of the amplifier is measured to be 48 dB which covers the signals with amplitude from 20 mu V to 5 mV. The amplifier consumes 23.5 mu W from a 1.2-V power supply and has a maximum gain of 69.8 dB. The simulated input referred noise is 5.3 mu V over 0.1 Hz to 20 kHz. Copyright (c) 2012 John Wiley & Sons, Ltd.

引用

页码：437 / 451

页数：15

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