Dear friends, I would like to know the total Rf equation for this circuit. I will be gla dif I can get some help here as I am very close to the solution of my problem. Here is the link to look at the circuit. http://i783.photobucket.com/albums/yy113/sandhi_prashant/Rfequation.jpg with best regards, Sandhi
Not quite sure what the point of the exercise is, but I get the following relationship for Rf (which I haven't double checked) where
A point to note (if the relationship I gave is indeed correct) is that Rf should be purely resistive and hence the imaginary term(s) in the derived value of Rf should be zero. This means Um would have a complex value such that the aforementioned condition is met.