Hi,
Does anyone know if there is a way to do a nyquist plot (real Z) vs (Imag Z) in ORCAD SPICE?
I would like to obtain this type of plot for a capacitor and/or battery circuit model such as the Randles cell which is R in series with R || C.

Once I am able to create nyquist plot, then I can go one and refine/tweak the cell model.

I can do a BODE plot just fine and get Phase, Magnitude, and impedance plots all vs freq but I just can't figure out how to do real vs imag.

Thanks and hope someone has an idea???

 

Does Orchad Spice allow you to do waveform arithmetic? If so you could do what you want from the Bode Plot.

Otherwise you could likely download the graphic simulation numeric values and do the calculations and plot in a Spreadsheet.