Large Signal Y-Parameter or S-parameter

Hamid,

I tried that subversion and don't get the problem - the simulation completes.

For universities, there are different support channels. Because Cadence offers the software to universities at a much reduced price, it's not really feasible to give the full support channel access to every end user at universities. So, for universities under the EuroPractice scheme, the issue can be logged with EuroPractice at  and for Universities elsewhere I believe one person (usually the professor responsible for the program at the university) will have Cadence Online Support access. Forgive my ignorance of the scheme outside of Europe since I'm in Europe...

The idea is that then some filtering of the questions happens so that the support channel is not flooded with basic questions which should have been dealt with by local supervisors or the Europractice scheme who act as first level support.

Regards,

Andrew.

Andrew,

Thank you so much. I totally understand that.

About the analysis, I could not find anything to change, but anyways, it works and I just have to stop it, not so bad :-)

BTW, this LSSP really works compared to my previous experiment.

Best regards,

Hamid

Hi Hamid,

It should be pretty easy to file questions with Support if you are in the U.S.  Each university has one or more contacts (such as the EE department chair or designated instructors) who are able to file Cases at http://support.cadence.com .  It's a simple matter of working with your designated university contact person. 

best regards,

Tawna

Hamid,

By the way, we've been discussing the validity of the zpm or ypm results when converted from large signal s-parameters. We don't think it's valid to do the same matrix manipulation for large-signal s-parameters as is done for small-signal s-parameters, and so the results may not be correct for a non-linear circuit. We probably need to do the calculations directly within the simulator.

So there probably is a good reason for not exposing the Z and Y parameters on the LSSP direct plot form or in the calculator.

Regards,

Andrew.

Hi Tawna

Yes we have some one but since the technical staff have a lot to do, it needs a very very serious problem to make ma put more on their shoulders.

If Cadence could change its policy that would be much better :-)

Hi Andrew,

Thanks a lot for following this.

Actually I think it should work the same way because if we keep the large input constant, then again we can consider the whole system linear and all equations would apply. Isn't it correct?

Best regards,

Hamid

HamidKhatibi said:

Yes we have some one but since the technical staff have a lot to do, it needs a very very serious problem to make ma put more on their shoulders.

If Cadence could change its policy that would be much better :-)

Maybe you think we have an infinite pool of engineers sitting around twiddling their thumbs? ;-) I'm afraid it's a matter of economics...

For this to happen, universities would then have to start paying real-world prices for the software, which is not in the interests of either side. I'd far sooner students have access to Cadence tools with things like community forums and Europractice etc as first line support than not have access at all.

Kind Regards,

Andrew.

Hamid,

Unfortunately I don't think it's quite that simple. Even getting s-parameters at all in this situation is tricky - the question of whether  you can use the whole matrix to compute other metrics is somewhat debatable. Anyway, we'll do the analysis to figure it out properly...

Kind Regards,

Andrew.

:-))

I understand it absolutely Andrew. You are right.

Andrew,

I am looking forward to hearing back from you.

Best regards,

Hamid