[SI-LIST] Re: ibis limitations

Kal,

An IBIS model will model a the driver characteristics of a 3 gig 
differential pair driver, if that driver is modeled well by the model 
supplier, if that driver does not have preemphesis, and if that model 
does not have a package.

IBIS cannot currently handle drivers with preemphesis and is very poor 
at modeling packages. You will have significant divergence from reality 
if you use an IBIS package model in a 3 gig differential simulation.

The solutions is generally to use Spice to model your 3 Gig devices.

Regards,

Scott

-- 
Scott McMorrow
Teraspeed Consulting Group LLC
2926 SE Yamhill St.
Portland, OR 97214
(503) 239-5536
http://www.teraspeed.com



kal ansari wrote:

>Hi all,
>
>I would like to get some opinions from you guys on the limitation with IBIS 
>models 
>
>in regards to signal bandwidth.  If I have a driver running around 3 Gbps with 
>a rise time
>
>around 70 ps, will an IBIS model for this make sense? What is the current 
>highest frequeny
>
>that IBIS accurately supports.   A lot of the EDA tools run with just IBIS, if 
>IBIS models
>
>are not accurate at these speeds, what is the solution?
>
>Thanks,
>
>gudo
>
>
>
>---------------------------------
>Do You Yahoo!?
>Yahoo! Health - Feel better, live better
>
>------------------------------------------------------------------
>To unsubscribe from si-list:
>si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>
>or to administer your membership from a web page, go to:
>http://www.freelists.org/webpage/si-list
>
>For help:
>si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>
>List archives are viewable at:     
>               http://www.freelists.org/archives/si-list
>or at our remote archives:
>               http://groups.yahoo.com/group/si-list/messages 
>Old (prior to June 6, 2001) list archives are viewable at:
>               http://www.qsl.net/wb6tpu
>  
>
>
>  
>



------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field

or to administer your membership from a web page, go to:
http://www.freelists.org/webpage/si-list

For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field

List archives are viewable at:     
                http://www.freelists.org/archives/si-list
or at our remote archives:
                http://groups.yahoo.com/group/si-list/messages 
Old (prior to June 6, 2001) list archives are viewable at:
                http://www.qsl.net/wb6tpu

Other related posts: