Journal Title : International Journal of Modern Trends in Engineering and Science
Paper Title : AN LOW POWER AND LOW NOISE CMOS INSTRUMENTATION AMPLIFIER WITH BIOMEDICAL APPLICATIONS
Volume 04 Issue 11 2017
ISSN no: 2348-3121
Page no: 6-8
Abstract – In this paper, we present a novel instrumentation amplifier INA topology for used to measure a range of electro physiological signals like ECG, EEG, EMG and EOG. The proposed INA features a PMOS-NMOS complimentary transistor input pair biased in sub-threshold region to effectively boost the transconductance of input pair and reduce the input referred noise The Gain is stable over the entire bandwidth. High CMRR and ultra-low noise specification. There are two Common mode feedback circuits which help establish common mode voltages without consuming extra power INA provides measured gain of 12.77dB and a bandwidth of 11khz with measured CMRR of greater than 100db.Hence the amplifier features for the first time a very low NEF.
Keywords – INA, CMRR, NEF, PMOS, NMOS, ECG, EEG, EMG, EOG
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