[SI-LIST] Re: Causality

Hi Jennifer,

You have one more option!

ADS is Cadence spectre-netlist compatible. You can directly use your existing 
spectre-netlist and simulate it with ADS-transient simulator through 
"dynamic-link".   

This way, you can take advantage of ADS-transient simulator with 
causality/passivity enforcement while using your existing spectre netlists. 

Regards,
Amolak S. Badesha
Application Expert
Agilent EEsof EDA
408-553-2606

-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On 
Behalf Of Jennifer Maharani
Sent: Monday, May 18, 2009 4:30 AM
To: WARWICK,COLIN (A-Americas,ex1)
Cc: <si-list@xxxxxxxxxxxxx>
Subject: [SI-LIST] Re: Causality

Hi Colin,

I run my transient simulation in Cadence environment. I have too many  
things to transfer to different environment, not to mention all the  
transistor level models that I am using.

The solution would be to generate a model that I can use in my Cadence  
env.

Please correct me if I am wrong, so the only solution that Agilent has  
to offer under this circumstances is the broadband spice generator.

Many thanks.


On May 16, 2009, at 2:09 AM, <colin_warwick@xxxxxxxxxxx> wrote:

> Hi Jennifer,
> I'm wondering if you'd tried ADS Transient Convolution simulator?  
> Our Broadband SPICE Model Generator uses a rational function approach:
>
> B. Gustavsen and A. Semlyen, "Rational approximation of frequency  
> domain responses by vector fitting," IEEE Trans. Power Delivery,  
> Vol. 14, No. 3, pp. 1052-1061, July 1999.
>
>
> ...which can yield an excellent model in certain circumstance.  
> However, ADS Transient Convolution has a more general approach:
>
> http://cp.literature.agilent.com/litweb/pdf/5990-3571EN.pdf
>
> I was wondering if you'd had the opportunity to evaluate it?
>
> Best regards,
>
> -- Colin
>
>
>
> -----Original Message-----
> From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx 
> ] On Behalf Of Jennifer Maharani
> Sent: Thursday, May 14, 2009 5:02 PM
> To: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] Re: Causality
>
> Many thanks Gary. I have used the broadband spice generator from
> Agilent. It does not fix the causality problem.
>
> On May 14, 2009, at 10:52 PM, "Gary Otonari" <garyo@xxxxxxxxxxxx>  
> wrote:
>
>> Jennifer -- Do you have ADS?  It might help you.  Here is some
>> material on
>> recent advances in their transient simulator.  The 1st link is for a
>> paper
>> we (GigaTest) did for the SI Seminar Series last year.  The 2nd is a
>> webinar
>> on the same topic ( I think delivered by Sanjeev Gupta of Agilent).
>> Good
>> luck.
>>
>> -- Gary Otonari
>>
>> http://www.home.agilent.com/upload/cmc_upload/All/Meas_Based_Transient_Simul
>> ation_Gigatest.pdf
>>
>> http://www.home.agilent.com/agilent/editorial.jspx?cc=US&lc=eng&ckey=1454262
>> &nid=-34511.0.00&id=1454262
>>
>>
>>
>> -----Original Message-----
>> From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx
>> ] On
>> Behalf Of Jennifer Maharani
>> Sent: Thursday, May 14, 2009 12:49 PM
>> To: si-list@xxxxxxxxxxxxx
>> Subject: [SI-LIST] Causality
>>
>> Dear all,
>>
>> I have non-passive non-causal S-parameter. I can use some commercial
>> tools that can generate broadband spice with passivity enforcement.
>> Not with causality enforcement, though.
>>
>> In transient simulation it clearly shows non-causal response.
>>
>> Does anybody know how to resolve this issue? Quick and dirty solution
>> will also be appreciated.
>>
>> Many thanks.
>
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