pspice
I want to get an impedance vs frequency graph for a capacitor in AC sweep analysis. I saw that there is an 'Impedance(1,2)' as shown in this picture in the Modify Trace window under Plot window templates:
Can someone tell me how to use this and also if I can get Impedance vs. Frequency graph using this? If you know any other way to get the required graph please do share.
"Across a specific place" means between two nodes within the circuit, correct? In this case you can select from the menu "mark advanced" the option "mark voltage differential".
I imported the netlist into LTSpice and it worked ok (I only had to rename V(CL) to V(4) in the .PROBE directive, since LTSpice didn't recognize that syntax to specify the voltage across the cap):
The results of the simulation are shown below:
Therefore there is nothing inherently wrong with your netlist. Probably the simulation engine of PSPICE didn't succeed to find a solution for the equations. Try to fiddle with the simulation accuracy parameters (I don't use PSPICE, so I cannot help with that).
Best Answer
Impedance(Voltage,Current)
So for instance if you are trying to plot the impedance of a capacitor C1 vs. frequency, you would type in something like:
Impedance(V(C1:1), I(C1))
It is essentially just the same as typing in V/I manually, e.g. V(C1:1)/I(C1)