I am trying to calculate input impedance of a multiple feedback low pass filter. What I need is the symbolic expression as simple as possible so that later I fill in the values and get the impedance itself:
I assume that I am on right track in calculation, the thing is I can not go any further and simplify the equation more. Can someone please help with putting calculated V2 (down in the writings) into equation 2 and then put Vin into equation 1 and simplify it so that i1 will be removed?
P.S: I posted this question in electronics and math of stack exchange but they suggested to be posted in physics!