Impedance Locus - Reactance vs Resistance Plot

[Shailesh@IITB]

Hi,

I am new to using MultiSim, and so still finding my way around. I have a circuit (consisting of basically parallel RC) and would like to do an AC analysis of the same. I have seen that MultiSim provides several features for these under Simulate -> Analyses -> "AC Analysis" and "Single Frequency AC Analysis". I managed to generate Impedance (Z) vs Frequency (f) via the "AC Analysis" method. That was pretty straightforward.

Now I want to generate an Impedance Locus - i.e. a plot of Reactance vs Resistance (also called a Cole-Cole plot, I believe), for my circuit over a range of frequencies (so as to get a locus) like for the Z vs f plot. I tried the "Single Frequency AC Analysis" method and I got values for Reactance and Resistance, but for a single frequency value, as the Real and Imaginary parts of the output (I have verified that the values are accurate). So I am left wondering how I can have this run over a range of frequencies (say 0.001 Hz to 1000Hz) and obtain a consolidated output. Also, if possible, whether I can directly have this plotted to see the locus grapically.

I have gone through the forum and video tutorials, but couldn't come up with anything. Thanks a lot, in advance!

Cheers,

Shailesh Appukuttan

[Miguel_V]

Hi,

Running an AC Analysis, (not the single frequency kind) allows you to choose a range of frequencies and plot it in various ways. So you can select the start and stop frequency, the grouping type and sweeping type and then select the variables you want to output. If you want to output a specific parameter from a model, the under more options in the Output tab you'll find the add device/model parameter option where you can select what you like.

King Regards,

[Shailesh@IITB · Accepted solution]

Hey that worked perfectly! I was able to plot the real and imaginary parts.

Thanks a lot!