I did some measurements on a system which is currently basically a black box for me. I'm normally a programmer and I'm doing an internship with no prior knowledge on circuitry, or physics in general, so please bear with me.
This is about what I know about the system:
I controlled the input voltage and frequency and measured the output current:
I'm not really sure where that black border comes from, it seems to be caused by matplotlib. It's frequency on x, volt on z, and current on y.
I figured out that on each frequency the voltage and current have the same ratio, so I decided to plot the "measured resistance" against frequency:
(Frequency on x, Resistance on y)
As you see I tried to fit a curve on it. This curve is just an inverted Gaussian curve, which I don't expect to be the right formula. I need to be able to calculate the expected restistance on each frequency (not just the ones I measured, but also in between each frequency measurement.)
Which formula could I use to fit the curve?