Hello ;
its the contiue of this thread
https://e2e.ti.com/support/data-converters/f/73/t/847712
i have tested the circuit and we noticed that when the elctrods is attached to simulator or body ; there is a DC offset is added to the ECG sigal ( exponential dc offset ) , i think this DC is the electrodes DC ; but the problem that the input capacitor and the pullsup resistor add a hug time constant more than 40 sec to filter this DC .
I am looking for a solution ; a IIR DC filter can be applied but this filter need about 5 seconds to be settled .
any other suggestion please ?
Thank you in advanced