Am trying to apply the FACTS method to find out the transfer function for this circuit as shown below. This is a Pi-filter circuit with all its component parasitics and also including the source and load resistances. I would like to find out the transfer function of this circuit and match its plot from Mathcad with simulation.
First, to find out the zeros of the this transfer function by inspection, I placed all circuit elements in its high frequency state. I can observe the response Vout is still present. In that case, can I assume that this circuit has 6 zeros associated with it?
But as per the answer provided in this link, we have to place the other associated circuit element in its DC state and observe if the response is still present. Since this circuit has around 6 reactive elements, how do I decide which circuit element should be in DC State and which circuit element should be in high frequency state?
I was able to follow some examples done based on 2nd and 3rd order circuits shared in the above links. But with this circuit configuration and so many reactive elements, frankly am lost.
It would be great if you could share some insight on how to derive the transfer function for this circuit including its poles and zeros.