Conin wrote:
"I have 2 circuits in a single simulation file. I would like to compare the output noise between the circuits on a single plot. I'd like to do this without post processing .RAW files in the LTSputil tool. How can I step or parameterize the .NOISE simulation directive to have both results at the same time?"
If they are both in a single simulation file, then you really have one circuit. You just happen to think of the two halves as being separate, but LTspice doesn't know this. Therefore, you already have both circuits at the same time, don't you?
When you run the simulation, you can plot the noise from both halves on the same plot. I see no need to parameterize or step anything or to do any post-processing.
If this doesn't answer your question, maybe you need to be more specific, or upload your simulation file(s). Remember to include all symbols and models that didn't come with LTspice, and if there's more than one file, zip them into one .ZIP file (that's .ZIP, not another file type). Don't include .raw or .log files. Remember to read the instructions on the group's main webpage and in the email you received when you joined.
Regards,
Andy
