Hey guys,

I have been assigned a task to design an adjustable audio amplifier. the circuit should be able to tune into the edge frequencies fl and fh as well as A1, and A2 as seen in the attached file below. Furthermore, it is anticipated that I need to design various filters for different frequency bands ( eg. high pass filter for f ≥ fh). It is also required to properly filter and handle 50Hz tone that might be injected from the power supply.

Given:
A1 = 24
A2 = 1.6
fl = 3108
fh=11920

Any suggestions? I have tried looking into multi-stage amplifications but I don't know if I am on the right track

Thank you very much

 

You need to learn about active highpass and lowpass filters. You also need to learn about a 50Hz notch filter.
Then when you learn about them you put them together and make them adjustable to do what the requirement is.