I'm from Bangladesh..i am doing my final year thesis project..It is about vital signs monitor or patient monitor.so one part of our project is ECG .in our country we can't manage all the component that required for ECG circuit.i attested the circuit diagram.
I have AD620A.but i cant manage OP97.
I can't manage AD624AD.
Availability of component in our country is very tough.
so if you give me some idea about how do i solve out the problem briefly it ll be very helpful for me.
thanking you,
masba
Did you look at the datasheet for the OP97 opamp? It has extremely low input offset voltage and offset current.
You could use an ordinary low noise opamp and trim the offset yourself with a trimpot.