[SI-LIST] Re: time domain simulation of s-parameter

Interesting thread so far.

There are tools that can convert the S-params to an equivalent passive
circuit, which automatically insures passive/causal.  Other tools can
"adjust" the S-params to guarantee passivity and causality (such as a
pole/zero format), to account for noise in the data.

The usual caveat applies: the modified model could result in slower
simulation.  For example, slower simulation with added "nodes" is a known
issue in SPICE.    Some tools let you select the number of RLC stages to
use, so you can trade off accuracy against SPICE simulation time.

- Lynne


"IBIS training when you need it, where you need it."

Dr. Lynne Green
Green Streak Programs
http://www.greenstreakprograms.com
425-788-0412
lgreen22@xxxxxxxxxxxxxx



-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
Behalf Of Saoer Sinaga
Sent: Thursday, November 29, 2007 11:02 AM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: time domain simulation of s-parameter

That's not always the case. When you don't have DC data in your S-par, not
to mention the S-par is not passive guaranteed, your transient simulation
will not converge.
saoer



On 11/29/07, sanjeev_gupta@xxxxxxxxxxx <sanjeev_gupta@xxxxxxxxxxx> wrote:
>
> Hi SKGUPTA,
>
> Kindly contact ADS online Tech support! ADS provide the most robust = 
> convergence on S-parameters.
>
> Sanjeev
> Agilent EEsof
>
> -----Original Message-----
> From: si-list-bounce@xxxxxxxxxxxxx 
> [mailto:si-list-bounce@xxxxxxxxxxxxx] = On Behalf Of Sanjeev Gupta
> Sent: Tuesday, November 27, 2007 6:49 AM
> To: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] time domain simulation of s-parameter
>
> Hello All
> I am trying to do time domain simulation using Agilent ADS after = 
> extracting s-parameter model from Power SI.
> But, i am getting lot of convergence issue. Simulation gets terminated 
> immediately.  I do not get any time domain waveform.
> kindly suggest a solution.. which tool can solve such problem very 
> efficiently?
> Thanks in advanve
> Sanjeev
>
>
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