RE: [IBIS-Users] IV Curves

From: Tom Dagostino <tom@teraspeed.com>
Date: Sun Jan 09 2005 - 20:41:50 PST

Think about reflections off an open transmission line for your answer.

Tom Dagostino
Teraspeed Consulting Group LLC
503-430-1065
tom@teraspeed.com
www.teraspeed.com

-----Original Message-----
From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org]On
Behalf Of lee yang
Sent: Sunday, January 09, 2005 5:58 PM
To: ibis-users@eda.org
Subject: [IBIS-Users] IV Curves

Hi IBIS experts:

I have a few questions regarding IBIS data:
1) What is the reason of ground clamp and pulldown data is ground relative
while power clamp and pullup data is vcc relative?
2) The IV curves data is covered from -vcc to 2vcc, in what condition the
voltage would become -vcc? (eg1: output is driving vcc and the receiver end
is being shorted, the reflection coefficient is -1, then the maximum
negative voltage is 0V (vcc + (-1*vcc)=0); eg2: output is driving 0v and the
reciever end is being shorted, the reflection coefficient is -1 as well,
would it be any reflection if the output is driving 0V with reciever end
being shorted to ground?)
Hope you all could shed some light here.
Thanks.

Yours Faithfully,
LY

_________________________________________________________________
Find answers fast with MSN Search BETA. http://beta.search.msn.com.my/ New
look and improved results. Give it a try!

|------------------------------------------------------------------
|For help or to subscribe/unsubscribe, email majordomo@eda.org
|with just 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 email a written request to ibis-request@eda.org.
|
|IBIS reflector archives exist under:
|
| http://www.eda.org/pub/ibis/email_archive/ Recent
| http://www.eda.org/pub/ibis/users_archive/ Recent
| http://www.eda.org/pub/ibis/email/ E-mail since 1993

|------------------------------------------------------------------
|For help or to subscribe/unsubscribe, email majordomo@eda.org
|with just 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 email a written request to ibis-request@eda.org.
|
|IBIS reflector archives exist under:
|
| http://www.eda.org/pub/ibis/email_archive/ Recent
| http://www.eda.org/pub/ibis/users_archive/ Recent
| http://www.eda.org/pub/ibis/email/ E-mail since 1993
Received on Sun Jan 9 21:14:59 2005

This archive was generated by hypermail 2.1.8 : Sun Jan 09 2005 - 21:17:25 PST