eeg

Hello all, I am a computer and electrical engineering student and I am doing a project where I am making an EEG. I used a design that I found here: https://hackaday.io/project/167393-low-cost-eeg-circuit. I have checked the circuit that we made on a breadboard several times and everything is...

Can anyone explain this bootstrapped HF rejection which is shown in the below circuit? What is the purpose of that? *This is a diagram of an active EEG electrodes