Hi, I need some help understanding how to design an amplifier to meet given demands. Ok, the demands are: Gain = 40dB (100) BW = 60kHz I am supposed to use LM324, so using one opamp is out of the question here. I have to use more. Now I know how to get the gain right, only by putting for example two opamp in series, each with gain=10. The thing I cant understand is how to make the BW right on the output. Can anyone please explain to me how I can achieve BW=60kHz? I was thinking about using the two opamps with gain = 10 each and a low-pass filter on the output to set the cutoff frequency. I did not get it to work, anyone know why? I also had a chat with my professor today, and he confused me abit. I asked him about how one should look at the BW when putting opamps in series. And he said one should look at fc as -6dB if there are two opamps in series. Is that right? I thought that no matter what one should look at fc as -3dB.