@User I was wondering if there was any plans for adding transient noise to Xyce?

I would second that. The transient noise analysis and use of s-parameters in simulations are really needed.

@yrrapt and @Murat Eskiyerli, both of those features are on our long-term to-do list. We added S-parameters to frequency domain analyses pretty recently. Adding them to transient is a bit harder so we haven’t gotten to it yet. As to transient noise, we’ve been meaning to do that for a while, but we haven’t gotten much pull from our internal users on that feature. So, it has tended to not be the highest priority. But getting this feedback helps.

Can you use for example, touchstone files in AC simulations?

I think at the moment we have support for touchstone output from .LIN analysis. I need to double-check if we can read it as input.

That is what I remember too. Haven't checked it so far.

It looks like we can read touchstone for the “YLIN” device. We have at least one test case that uses it with harmonic balance. That test is in Xyce_Regression/Netlists/YLIN/idealGain.cir

Thanks. Will check it tonight.

Let me know how it goes. I wasn’t the person who worked on this (so my memory of the details is not precise). I’ll ask him what the status of this is. The AC code is completely separate from the HB code in Xyce. So it is theoretically possible that we only have it working with HB.

Still you could get HB TD output. It will be quite sufficient as a substitute for full-blown transient simulations for most RF designs.

🙂

I just checked the file you mentioned. It is simulating for AC, HB and TRAN analysis. I can't say that I checked the accuracy of the results.