RE: [SI-LIST] : IBIS models at Gbit speeds

About this list Date view Thread view Subject view Author view

From: L· (John@quantatw.com)
Date: Fri Dec 10 1999 - 16:18:30 PST


Hi,
Indeed, XTK model contains a few number of points compared to IBIS after
doing IBIS2XTK. However, plotting both, you will find that they are quite
match with each other.
XTK will automatically increase points at the truning corner of waveform.
The accuracy of simulation is not suffered.

John Lin
SI engineer at Quanta Computer Inc.

 

-----Original Message-----
From: Jim Freeman [mailto:freeman@broadcom.com]
Sent: Saturday, December 11, 1999 2:02 AM
To: si-list@silab.eng.sun.com
Subject: Re: [SI-LIST] : IBIS models at Gbit speeds

Hi,
    To my knowledge, Quad and Viewlogic Xtk don't directly use IBIS models.
Instead, there is a compiler the linearizes the IBIS models and drastically
reduces the number of points that are used in simulation.

Jim Freeman

Mike Henson wrote:

> Just FYI, if you would like to see IBIS models constructed with quality
and
> thoroughness, take a look at models build by Viewlogic/Quad.
>
> Mike H.
>
> _________At 08:28 AM 12/9/99 -0600, Roy Leventhal wrote_________
>
> All,
>
> Mike Mayer's comment doesn't surprise me. And, everyone who has responded
sees
> it through their own filter. Some have made comments that relate Mike's
> story to
> simulator capabilities, some relate to how far you can push the IBIS
model.
>
> My perception of Mike's comment simply picks up on the low amount of
effort
> and
> expense that the model supplier is apparently willing to put into their
> product.
> Apparently, they should be capable of better. This slipshod work is a
> lamentable
> human trait which is very common. Before you think me too pure, I have
slipped
> into it on occasion myself.
>
> My problem is how very common such slipshod work is in the models I have
seen,
> and not just IBIS.
>
> It's rare (but, not unheard of) that I have seen evidence that my model
> suppliers take pride in delighting the customer.
>
> Regards,
>
> Roy
>
> **** To unsubscribe from si-list: send e-mail to
> majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE
> si-list, for more help, put HELP.
> si-list archives are accessible at http://www.qsl.net/wb6tpu/si-list
> ****
>
> ===============================================================
> \\ Mike Henson TEL: 847-577-7805
> // FAX: 847-577-7806
> -- Viewlogic Systems Inc MOBILE: 847-867-0640
> \\ 3800 North Wilke Road Suite 300 PAGE: 888-992-5698
> // Arlington Heights IL 60004 mhenson@viewlogic.com
> ===============================================================
>
> **** To unsubscribe from si-list: send e-mail to
majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE
si-list, for more help, put HELP.
> si-list archives are accessible at http://www.qsl.net/wb6tpu/si-list
> ****

**** To unsubscribe from si-list: send e-mail to
majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE
si-list, for more help, put HELP.
si-list archives are accessible at http://www.qsl.net/wb6tpu/si-list
****

**** To unsubscribe from si-list: send e-mail to majordomo@silab.eng.sun.com. In the BODY of message put: UNSUBSCRIBE si-list, for more help, put HELP.
si-list archives are accessible at http://www.qsl.net/wb6tpu/si-list
****


About this list Date view Thread view Subject view Author view

This archive was generated by hypermail 2b29 : Tue Feb 29 2000 - 11:39:06 PST