Active Second-order low-pass Butterworth filter

[webhelp]

I need help in designing an active 2nd order low-pass Butterworth Filter that meets certain requirements.
The requiremetns are that it needs to be a minimum 2nd order coincident pole system design with a break frequency at 6kHz
and a minimum 40dB roll-off at the break frequency.

 

[Ouabache]

I am no expert on filter design, but I may have some helpful suggestions and there are others here who can assist you.
What have you done so far in your design? At what point are you getting stuck?