From: Laurence Michaels (firstname.lastname@example.org)
Date: Mon Dec 13 1999 - 06:13:21 PST
> John Lin (林朝煌) wrote:
> 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:email@example.com]
> Sent: Saturday, December 11, 1999 2:02 AM
> To: firstname.lastname@example.org
> Subject: Re: [SI-LIST] : IBIS models at Gbit speeds
> 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
I believe this reduction of points can be influenced by using
-vt <val> voltage tolerance in Volts
-it <val> current tolerance in Amps
-ae <val> absolute error (0.0 < val < 1.0)
Exactly how these switches affect the output, and what the default
values are, does not seem to be documented anywhere. Anyone from
Viewlogic/Quad care to comment?
-- Laurence Michaels PS, if you have a vacation or "out-of-the-office" auto-response program, please make sure it ignores mailing lists. For info, contact your local system administrator.
**** To unsubscribe from si-list: send e-mail to email@example.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 ****
This archive was generated by hypermail 2b29 : Tue Feb 29 2000 - 11:39:06 PST