On Thu, Jun 7, 2012 at 9:49 AM, V G wrote: > On Wed, Jun 6, 2012 at 6:37 AM, Oli Glaser > wrote: > > > If I understand what you are asking for: > > > > 1. Run the simulation. > > 2. Right click the graph and select "add trace". > > 3. In the box add the V/I of the relevant component - e.g. something li= ke > > V(n001)/I(C1) > > 3. Press OK and it should plot in Ohms - to view real and imaginary par= ts > > left click on the y axis values (cursor changes to a ruler) and select > > "cartesian" in the drop down box (default is "bode", or nyquist is the > > other option) > > > > Hope this helps.. > > > > I tried all that, everything I could think of, before posting. This is wh= at > LTSPICE is showing me for the calculated impedance graph (red) and I don'= t > really know why. If I punch those numbers (the red graph's equation) into= a > calculator, I get expected values for the capacitor's impedance. But for > some reason, the graph looks really strange with really odd values in > LTSPICE. The green and blue graphs look fine though. > > I just tried that circuit and it works fine for me. Only thing I can think of is that you are trying to plot just the real component of C1, which will be 0 if you have not set the ESR of C1 to a realistic value (say 100mOhm or whatever). So this means you probably have "don't plot imaginary component" set. If you left click on the right side axis and press ok you should get the imaginary component plotted (the axis should show e.g. 10KiOhm, 20KiOhm, etc, with the i being for imaginary) which should be what you expect. Let me know how it goes... --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .