1. The problem statement, all variables and given/known data I need to work out the impedance of this notch filter, and what I really need is to know how to read the diagram, because if I can do that the rest isn't so hard. The diagram looks like this (I don't know if this uploaded right) So really, all I am trying to do is tell if the inductor and capacitor should be considered in series or parallel, and if the resistor should be trated as in series with another "resistor" (the parallel sum of the inductor and capacitor) or if I should treat the resistor as in parallel with both the inductor and capacitor. Reading diagrams is elementary I know but sometimes a little explanation goes a long way, and I suspect that I should treat the inductor and capacitor as a mini-series in parallel with the resistor but I wanted to make sure. I don't want the answer or anything, jut a note as to where to get the ball rolling.