I need to amplify a very low signal (around 33µVp-p to 1Vp-p) and I have LM358 at hand. I already tried a couple of circuits and I've got a 4500 gain using a single supply with two stages. Using a circuit like the one I'm attaching, but with different values.
The circuit in the image is a variation from the one I've already tested. I have decoupled DC component and used voltage dividers to adjust the DC at the input of every stage. I need you guys to tell me if you think this will work.
I know the final output seems to be saturated but at first that won't be a problem.
I have tried using a dual (or split) supply so I won't have to deal with the DC offset in every stage. But I have another problem there (I will open another post for that). But basically I can't fix the virtual ground and the whole thing goes very unstable.
The circuit in the image is a variation from the one I've already tested. I have decoupled DC component and used voltage dividers to adjust the DC at the input of every stage. I need you guys to tell me if you think this will work.
I know the final output seems to be saturated but at first that won't be a problem.
I have tried using a dual (or split) supply so I won't have to deal with the DC offset in every stage. But I have another problem there (I will open another post for that). But basically I can't fix the virtual ground and the whole thing goes very unstable.