Title :
A CMOS CFIA with digitally controlled gain designed for EEG systems
Author :
Soliman A. Mahmoud;Aisha A. Alhammadi
Author_Institution :
Department of Electrical and Computer Engineering, University of Sharjah, Sharjah, UAE
Abstract :
The current feedback instrumentation amplifier (CFIA) designed for EEG detection systems is presented. This CFIA includes two digitally programmable operational transconductance amplifiers (DPOTAs) and a current feedback operational amplifier (CFOA) where the digital control of DPOTA is done using 4-bit current division network (CDN). PSpice simulation results are carried out using 0.25μm IBM CMOS process under ±0.8V supply voltage. The CFIA reaches 126.6dB common mode rejection ratio (CMRR), consumes 695μW, and has 9.4777μV/√Hz input referred noise. The achieved gain is from 22.236dB to 45.386dB. These results make the CFIA suitable for the EEG detection systems.
Keywords :
"Electroencephalography","Instruments","CMOS integrated circuits","Transconductance","Bandwidth","Operational amplifiers","Digital control"
Conference_Titel :
SoC Design Conference (ISOCC), 2015 International
DOI :
10.1109/ISOCC.2015.7401638
