ECG with DRL circuit help

[Dementium]

Hey, I'm Daniel and new in the forum!

I'm trying to build a circuit to preform ECG with DRL for a school project. I'm having problems with amplification and simulation.

In the circuit I'm using the Wilson Central (Right Arm + Left Arm + Left Leg), one high pass filter (0.5 Hz), one low pass filter (150 Hz) and one band pass (50 Hz). I'm still learning about circuits but I think the calculus for the amplification and filters are ok, correct me if I'm wrong please, all feedback is welcome.

I'm getting a signal of pV on the Vout, with the gain of the circuit should be V.

I attach the circuit and some pics.

Thanks in advance!

Daniel.

[FeSe]

Hi Daniel,

Your output signal (channel B in Multisim) is extremely low, which means the amplification isn’t working properly.

To improve it, you should increase the gain of your amplifier (aim for 500–1000×) and check the filter stages because they might be attenuating the signal too much.
If you're trying to remove 50 Hz power line interference, consider using a notch filter instead of a band-pass.

Regards