[SI-LIST] Re: Convergence problems with Hspice
- From: Khalid Ansari <khalida@xxxxxxxxxxx>
- To: scott@xxxxxxxxxxxxxxxx,"si-list@xxxxxxxxxxxxx" <si-list@xxxxxxxxxxxxx>
- Date: Thu, 27 Sep 2001 10:45:31 -0700
>
>One more possibility:
>
>Sometimes convergence problems will occur when
>Ansoft package models do not have the correct connections
>made to power and ground.
Scott,
Well that was the problem, some pins in the package models
weren't tied to ground through 50 ohms. Not only did that
take away my convergence problems but improved some of
the ringing I was seeing on the output.
Thank you all for your great responses, it's amazing how much
information I have gotten on convergence in the past two days.
Khalid
>Be sure that power and ground pass through the model
>and have different names on the die side of the model.
>Many people mistakenly (or inadvertently) tie both the
>die side and the pin side of the model to ground. This can
>cause all sorts of convergence problems due to the shorted
>loop.
>
>
>regards,
>
>scott
>
>
>--
>Scott McMorrow
>Principal Engineer
>SiQual, Signal Quality Engineering
>18735 SW Boones Ferry Road
>Tualatin, OR 97062-3090
>(503) 885-1231
>http://www.siqual.com
>------------------------------------------------------------------
>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:
>//www.freelists.org/webpage/si-list
>
>For help:
>si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>
>List archives are viewable at:
> //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:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List archives are viewable at:
//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:
