[SI-LIST] Re: (no subject)
- From: "Clewell, Craig" <cclewell@xxxxxxxxxxxxxx>
- To: 'winson yu' <winsonyu@xxxxxxxxxxx>
- Date: Wed, 11 Dec 2002 10:56:19 -0500
Winson,
Correction...you have been working on the file since September.
All that has been proven thus far is that the one scenario works, but you
MUST use the delmax command in HSPICE in order to make this circuit work.
If you do not use this option the file will not generate the correct result.
I have never had to use the delmax command before with any other file, and
I'm not quite sure how you choose the correct value to use. How will I know
what value to use for delmax from one model to the other? How did you come
up with the value of 2ps as the value to use to get this particular case to
work? How will my customer know what value of delmax to use? What if they
are not using HSPICE and are forced to use a generic model in a different
flavor of SPICE?
I have not been able to see the "generic" output file work yet. And, as Yu
pointed out this morning, I am anticipating this file to be enormous. I had
a simple 2 port running for over an hour and a half before I shut it down.
Also, I have not verified or have received any information on the ability to
obtain accurate crosstalk with either type of model. The next step would be
to jump to at least a 4 port and investigate how well the coupling is
interpreted.
As far as a public forum goes....well that's what I thought it was for.
Nobody is charging anyone for claims made here. Although I posess these big
brass ones I will leave the personal BS you brought with your last e-mail
out of this...The End.
Have a good day,
Craig
-----Original Message-----
From: winson yu [mailto:winsonyu@xxxxxxxxxxx]
Sent: Monday, December 09, 2002 7:33 PM
To: cclewell@xxxxxxxxxxxxxx; scott@xxxxxxxxxxxxx
Cc: si-list@xxxxxxxxxxxxx; xlzhou@xxxxxxxxx
Subject: RE: [SI-LIST] Re: (no subject)
Hi Craig,
I am disappointed to see you jump so quickly to a negative conclusion
regarding the Broadband SPICE results in a public forum while work was in
progress. We just received your latest data last week and have been working
on it to ascertain the problem with your results. We are pleased to have
now found and corrected the error you had in your HSPICE file. The new
results generated by Broadband SPICE using the corrected HSPICE file should
now match with your measurements. We will send you the results in a
separate e-mail for your review.
Regards,
Winson
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx
[mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of Clewell, Craig
Sent: Monday, December 09, 2002 5:43 AM
To: 'scott@xxxxxxxxxxxxx'
Cc: 'si-list@xxxxxxxxxxxxx'; xlzhou@xxxxxxxxx
Subject: [SI-LIST] Re: (no subject)
Scott,
I will go along with scary...but I'm not sure I would agree with the
accurate part. I have seen problems in Sigrity's software when using both
the Hspice and Generic outputs. If you have measured data in the time
domain that agrees to the results you get from a .tran run I would like to
see it. I will say, however, that the frequency domain results look pretty
good, but I'm not as impressed with the time domain results.
Nspice did a much better job in the time domain, and also was able to handle
the .ac run well too.
Regards,
Craig
-----Original Message-----
From: Scott McMorrow [mailto:scott@xxxxxxxxxxxxx]
Sent: Friday, December 06, 2002 4:46 PM
To: xlzhou@xxxxxxxxx
Cc: 'si-list@xxxxxxxxxxxxx'
Subject: [SI-LIST] Re: (no subject)
Mick,
There are two solutions which I use:
1) Apache Nspice is an Hspice compatabible simulator that can
co-simulate with Touchstone S-parameter files.
http://www.apache-da.com/
2) Sigrity BroadBand Spice can convert Touchstone s-parameter files into
spice black boxes.
http://www.sigrity.com/
Both are scary accurate in both the frequency and time domain.
regards,
scott
--
Scott McMorrow
Teraspeed Consulting Group LLC
2926 SE Yamhill St.
Portland, OR 97214
(503) 239-5536
http://www.teraspeed.com
Zhou, Xingling (Mick) wrote:
>Hello,
>
>Did anybody successfully generate broadband (DC-20GHz) SPICE model from S
>matrix for complex structures using the SPICE generator in ADS ? Or any
>other alternatives. I know Ansoft fullwave SPICE does the work.
>Unfortunately, some circuit simulators do not support the frequency
>dependent lookup table sources. We can definitely use [S] directly, but
some
>users still prefer SPICE models. Any experience to share ?
>
>Thanks,
>
>Xingling(Mick) Zhou, PhD
>Signal Integrity Technologist
>Agere Systems
>
>Tel: 610-712-7462
>Fax: 610-712-4081
>
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