I am using LTspice on the circuit EMI spectrum study. Let's say I have two waveforms for V1 and V2. I wonder if in LTspice, I can plot the FFT results for :
(2) FFT(V1) and FFT(V2) on the same figure
I tried but it does not seem LTspice support these functions. Could anyone help me with LTspice? Thanks for help!
You can do math equations like V(a)+V(b) even with the FFT results in the FFT-waveform view.Just enter V(a)+V(b) instead of V(a) in the FFT waveform viewer.
The FFT is a linear process. Thus FFT( V(V(a)+V(b) ) is equal to FFT(V(a)) + FFT(V(b)).
Oh yes, I like this better. The only way I could figure out how to do it was to plot one node, and then right-click on the node name to edit it to include the addition of a second node: