Subject: [Fwd: [IBIS-Users] [Fwd: Non_monotonous data in IBIS models]]
From: Anshuli Goel (anshuli@india.ti.com)
Date: Sun Aug 18 2002 - 23:54:35 PDT
attached mail follows:
Hi Andy
Thanx for the response.But just wanted to know if this non-monotonic behaviour will be the case for input only or output only buffers also ? The models that I am using are input only and output only buffers .
I don't have any Bi-di buffer .The output buffer is 3-state output buffer .
Regards
Anshuli
Ingraham, Andrew" wrote:
> Non-monotonicity is normal for a bidirectional buffer and happens as a consequence of subtracting the clamp currents from the total currents to generate the pullup and pulldown current tables. In the region where the clamps are effective, the pullup and pulldown currents frequently have non-monotonic behavior.
>
> If ibischk were clever enough to sum the currents back together before checking for monotonicity, most of these warnings would go away.
>
> Anyway, IBIS doesn't care if the data is monotonic. It's just that some simulators that use IBIS data might be affected. Technically, IBIS model can have non-monotonic data.
>
> Regards,
> Andy
>
> |------------------------------------------------------------------
> |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
This archive was generated by hypermail 2b28 : Mon Aug 19 2002 - 00:13:16 PDT