sapphire_blue
New Member
Hey guys,
I am trying to build an ECG amplifier with 3 electrodes. I am using AD620 as the instrumentation amplifier. I built the ECG circuit shown in this link on page 15: https://www.electro-tech-online.com/custompdfs/2009/01/AD620.pdf
with a few modifications made to the right-leg driver circuit.
I didn't use C1 and R4. My right-leg driver circuit just has R1 = 50 Ohms and R2=R3=100 Ohms and LM741 as the op-amp. I removed C1 and R4 because I wasn't really sure why they were there. Our circuit is not working, all we see is noise. We placed two electrodes on the chest and one on the right wrist. Could someone please help me with this? Is there a better ECG circuit or could someone explain what exactly the right-leg driver circuit should have?
Thanks!
I am trying to build an ECG amplifier with 3 electrodes. I am using AD620 as the instrumentation amplifier. I built the ECG circuit shown in this link on page 15: https://www.electro-tech-online.com/custompdfs/2009/01/AD620.pdf
with a few modifications made to the right-leg driver circuit.
I didn't use C1 and R4. My right-leg driver circuit just has R1 = 50 Ohms and R2=R3=100 Ohms and LM741 as the op-amp. I removed C1 and R4 because I wasn't really sure why they were there. Our circuit is not working, all we see is noise. We placed two electrodes on the chest and one on the right wrist. Could someone please help me with this? Is there a better ECG circuit or could someone explain what exactly the right-leg driver circuit should have?
Thanks!