Re: [IBIS-Users] 答复: [IBIS-Users] A question about the ibis simulation.

The time and voltage differences between the three
curves are
due to the different PVT
(process-voltage-temperature) corners
represented by the model.

The "fast" ringing is probably due to package
parasitics and the
separation of receiver and termination.

The "ledge" is due to a reflection (probably at
rcvr/termination).

Regards,
Lynne

On 7/4/2011 11:15 PM, Zhanggezi wrote:
>
> Hello, Lynne,
>
> The three simulation outputs are different
> corners for one model(fast,typical and slow corners)
>
> *发件人:*Lynne D. Green
> [mailto:lgreen22@mindspring.com]
> *发送时间:*2011年7月5日12:00
> *收件人:*Zhanggezi
> *抄送:*'ibis-users'
> *主题:*Re: [IBIS-Users] A question about the
> ibis simulation.
>
> Hello, Grace,
>
> More information is needed to answer your question.
>
> What is changed between the three simulation
> outputs?
> * Different corners for one model?
> * Different IBIS or SPICE models?
> * Different simulators?
> * Some other difference?
>
> - Lynne
>
> "IBIS training when you need it, where you need it."
>
> Dr. Lynne Green
> Green Streak Programs
> http://www.greenstreakprograms.com
> 425-788-0412
> lgreen22@mindspring.com
> <mailto:lgreen22@mindspring.com>
>
>
>
> On 7/4/2011 6:53 PM, Zhanggezi wrote:
>
> Hi All,
>
> The topology is one on one. The simulation
> result is below. I am curious about the
> simulation circled
>
> by red pink. What’s the cause? Could someone
> give me any hint?
>
> Thank you.
>
> Grace
>
>
> --
> This message has been scanned for viruses and
> dangerous content by *MailScanner*
> <http://www.mailscanner.info/>, and is
> believed to be clean.
>
>
> --
> This message has been scanned for viruses and
> dangerous content by *MailScanner*
> <http://www.mailscanner.info/>, and is
> believed to be clean.

-- 
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.
--------------------------------------------------------------------
|For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org
|with the appropriate command message(s) in the body:
|
|  help
|  subscribe   ibis       <optional e-mail address, if different>
|  subscribe   ibis-users <optional e-mail address, if different>
|  unsubscribe ibis       <optional e-mail address, if different>
|  unsubscribe ibis-users <optional e-mail address, if different>
|
|or e-mail a request to ibis-request@eda-stds.org.
|
|IBIS reflector archives exist under:
|
|  http://www.eda-stds.org/pub/ibis/email_archive/ Recent
|  http://www.eda-stds.org/pub/ibis/users_archive/ Recent
|  http://www.eda-stds.org/pub/ibis/email/         E-mail since 1993