[IBIS-Users] RE: question about the [Composite Current] table

From: Muranyi, Arpad <Arpad_Muranyi@mentor.com>
Date: Thu Aug 30 2012 - 07:08:38 PDT

Ryohei,

No, your understanding is not correct. Since the
sum of the currents though each branch is zero,
the tool can calculate the bounce either way.

Thanks,

Arpad
====================================================

From: owner-ibis@eda.org [mailto:owner-ibis@eda.org] On Behalf Of Ryohei Kato
Sent: Tuesday, August 28, 2012 7:49 PM
To: ibis@eda.org; ibis-users@eda.org
Subject: [IBIS] FW: question about the [Composite Current] table

Hi IBIS experts,

How about this question ?

Regards,
Ryohei Kato

From: owner-ibis@eda.org<mailto:owner-ibis@eda.org> [mailto:owner-ibis@eda.org]<mailto:[mailto:owner-ibis@eda.org]> On Behalf Of Ryohei Kato
Sent: Tuesday, August 28, 2012 12:05 PM
To: ibis@eda.org<mailto:ibis@eda.org>
Subject: [IBIS] question about the [Composite Current] table

Hi IBIS experts,

I have the basic question about the [Composite Current] table of IBIS5 model.

The ibis5.1 syntax explains the [Composite Current] as follows.

Keyword: [Composite Current]

Required: No
Description: Describes the shape of the rising and falling edge current waveforms from the power reference terminal of the buffer.

And the circuit image is attached file.

So I understood as follows.

The ibis5 model can consider the Bounce of V(vdd,vss) because of the current "vdd -> pch -> R_fix -> gnd".
But the ibis5 model CAN'T consider the Bounce of V(vdd,vss) because of the current "V_fix -> R_fix -> nch -> gnd".

Is my understanding correct ?

Regards,
Ryohei Kato

--
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 mikelabonte@eda-stds.org
|or ibis-request@eda-stds.org
|
|IBIS reflector archives exist under:
|
|  http://www.eda-stds.org/ibis/email_archive/ Recent
|  http://www.eda-stds.org/ibis/users_archive/ Recent
|  http://www.eda-stds.org/ibis/email/         E-mail since 1993
Received on Thu Aug 30 07:09:08 2012

This archive was generated by hypermail 2.1.8 : Thu Aug 30 2012 - 07:09:43 PDT