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[SI-LIST] Re: time domain simulation of s-parameter
- From: "Saoer Sinaga" <saoer.sinaga@xxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Sat, 1 Dec 2007 10:26:53 +0100
Hi Aubrey,
What I did:
1. Produce high freq S-par using Full-wave EM tool.
2. Produce S-par at DC using Quasi-static EM tool.
3. Add this DC point manually into the high freq S-par.
4. Use Sonnet or Sigrity (passivity guaranteed) to produce broadband spice
out of the new S-par.
5. Result was very good.
I had a talk with James Rautio, the founder of Sonnet, some time ago. Sonnet
is releasing a new physical compact model generator soon.
Saoer Sinaga
NXP Semiconductors
On 12/1/07, Aubrey_Sparkman@xxxxxxxx <Aubrey_Sparkman@xxxxxxxx> wrote:
>
> Lynne,
>
> Are any of the "tools that can convert the S-params to an equivalent
> passive circuit, which automatically insures passive/causal" that you
> refer to commercially available tools? If so, please advise me which
> ones. The few I have tried have failed my causality test. You may
> reply privately if you don't want to advertise.
>
> Thanks,
> Aubrey Sparkman
> Enterprise Engineering Signal Integrity Team
> Dell, Inc.
> Aubrey_Sparkman@xxxxxxxx
> (512) 723-3592
> "A Measurement for every Model and a Model for every Measurement.
> Without Correlation, I don't believe either." - Aubrey Sparkman
>
>
> -----Original Message-----
> From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
> On Behalf Of Lynne D. Green
> Sent: Thursday, November 29, 2007 2:16 PM
> To: saoer.sinaga@xxxxxxxxx; si-list@xxxxxxxxxxxxx
> Subject: [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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