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

From: Zhanggezi <gezi.zhang@huawei.com>
Date: Wed Jul 06 2011 - 03:35:23 PDT

Hi All,

 

The topology is below. And ibis file is very large, I will share with you if
needed after deleting unnecessary information.

 

And the probe is on the receiver, three simulation outputs are different
corners for one model(fast,typical and slow corners), and I

Want to the reason for the spike. Any one can help?

 

发件人: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] 代表
Muranyi, Arpad
发送时间: 2011年7月5日 23:52
收件人: 'ibis-users'
主题: RE: [IBIS-Users] A question about the ibis simulation.

 

Naftali,

 

I am not sure I understand what the “The topology is one on one” is

referring to in the original question. So I am not sure what

you mean by “set a very same length to both T branches” either. Please

clarify your question.

 

Thanks,

 

Arpad

==============================================================

 

From: naftali refaeli [mailto:Naftali.Refaeli@ecitele.com]
Sent: Tuesday, July 05, 2011 10:49 AM
To: Muranyi, Arpad; 'ibis-users'
Subject: RE: [IBIS-Users] A question about the ibis simulation.

 

Do you mean that If he will set a very same length to both T branches –
then the phenomenon will disappear?

 

 

Naftali Refaeli

CAE Engineer

ITO

HP Enterprise Services

Telephone +972 3.9266973

Mobile +972 52.3542043

Email Naftali.Refaeli@ecitele.com

 

From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf
Of Muranyi, Arpad
Sent: Tuesday, July 05, 2011 6:45 PM
To: 'ibis-users'
Subject: RE: [IBIS-Users] A question about the ibis simulation.

 

Grace,

 

It looks like that the first ledge is the voltage that the

driver can drive with the load imposed on it by the T-line.

Once the reflection comes back to the driver the voltage

steps up to the full swing levels. This is basic T-line

theory.

 

Arpad

============================================================

 

From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf
Of Zhanggezi
Sent: Monday, July 04, 2011 8:54 PM
To: 'ibis-users'
Subject: [IBIS-Users] A question about the ibis simulation.

 

 

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

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Received on Wed Jul 6 03:38:11 2011

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