PROJECT TITLE :

Design of Ultra-Low Power Biopotential Amplifiers for Biosignal Acquisition Applications

ABSTRACT:

Fast development in miniature implantable electronics are expediting advances in neuroscience by allowing observation and management of neural activities. The first stage of an implantable biosignal recording system, a coffee-noise biopotential amplifier (BPA), is critical to the general power and noise performance of the system. In order to integrate a large number of front-end amplifiers in multichannel implantable systems, the facility consumption of every amplifier must be minimized. This paper introduces a closed-loop complementary-input amplifier, that features a bandwidth of 0.05 Hz to ten.5 kHz, an input-referred noise of two.2 $mu$V$_rm rms$, and a power dissipation of twelve $mu$W. As a purpose of comparison, a commonplace telescopic-cascode closed-loop amplifier with a 0.four Hz to eight.five kHz bandwidth, input-referred noise of three.two $mu$V$_rm rms$, and power dissipation of twelve.five $mu$W is presented. Conjointly for comparison, we have a tendency to show results from an open-loop complementary-input amplifier that exhibits an input-referred noise of 3.half-dozen $mu$V$_rm rms$ while consuming 800 nW of power. The two closed-loop amplifiers are fabricated during a 0.thirteen $mu$m CMOS method. The open-loop amplifier is fabricated in a zero.five $mu$m SOI-BiCMOS method. All three amplifiers operate with a one V supply.


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