# Single Freq Analysis w/ LTSpice

Thread Starter

#### imzack

Joined Nov 3, 2010
71
I am trying to see node voltages of my schematic using LTSpice

I see tutorials on how to plot AC over a frequecy range, but I just want to get my Input impedance at a single frequency right now.
And have it plotted nicely on the schematic.

Is there any way to get these DC Operating points to compile as AC operating points, and then make a equation to calculate the Input Impedance?

Thanks!

#### ericgibbs

Joined Jan 29, 2010
9,346
hi imzack.
Have you calculated by hand the impedance of that circuit at 60Hz.?

E

#### Jony130

Joined Feb 17, 2009
5,127
Try AC analysis at a single frequency (60Hz)
Code:
.ac oct 1 60 60