Design and Implementation of Instrumentation Amplifier for EEG in 180nm CMOS technology

Abstract

The EEG is Electro Encephalo Gram that which gives the electrical activity of the brain. Analysis of the electrical activity is very important to diagnose neurological problems. But, the problem generally involved is that the EEG signals have very low amplitude and these very low amplitude signals cannot drive displays for further analysis. So, we require to use amplifiers. Instrumentation amplifier is widely used for such applications because they give high gain. For designing the instrumentation amplifier, we have to first design the operational amplifier and this is further used to design the instrumentation amplifier. The 180nm CMOS technology has been used for the Implementation of this amplifier. It gives a hiah gain of 111 dB an low power dissipation of 16mW.