RE: [IBIS-Users]: DC voltage for C_comp Calculation

From: Muranyi, Arpad <Arpad_Muranyi@mentor.com>
Date: Mon Oct 11 2010 - 17:08:15 PDT

Surendra,
 
By *-AMS extensions of IBIS I am referring to the [External Model]
or [External Circuit] keywords which allow you to use VHDL-AMS,
Verilog-AMS, or Verilog-A and Berkeley SPICE for writing models.
 
Unfortunately not too many EDA vendors support these languages,
so you may need to look around first whether your tool can use
such models because you roll up your sleeves to write models like
that.
 
Arpad
====================================================================

________________________________

From: surendra.deshmukh@wipro.com [mailto:surendra.deshmukh@wipro.com]
Sent: Monday, October 11, 2010 12:04 AM
To: Muranyi, Arpad; ibis-users@eda.org
Subject: RE: [IBIS-Users]: DC voltage for C_comp Calculation

Hi Arpad,

             Thanks for information. I have seen some of the tools use
vdd/2 as a DC value to calculate C_comp so as per your comments, I would
say it is not always good to use vdd/2.

             Can you elaborate what is *-AMS extensions of IBIS?

 

Regards

Surendra

 

________________________________

From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On
Behalf Of Muranyi, Arpad
Sent: Friday, October 08, 2010 9:38 PM
To: ibis-users@eda.org
Subject: RE: [IBIS-Users]: DC voltage for C_comp Calculation

 

The problem is that you may get different results

depending on the DC bias. For that reason I usually

recommend to use a DC value that is close to where

the signaling will be, but you could still get

different results for the high and low levels.

This is when good engineering judgment comes handy,

or a more elaborate behavioral model perhaps using

the *-AMS extensions of IBIS...

 

Arpad

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

 

________________________________

From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On
Behalf Of surendra.deshmukh@wipro.com
Sent: Friday, October 08, 2010 8:24 AM
To: ibis-users@eda.org
Subject: [IBIS-Users]: DC voltage for C_comp Calculation

Hi,

       For the calculation of C_comp by AC sweep, we apply an AC signal
along with some DC voltage. What should be the value of this DC voltage
to get correct C_comp value?

 

Thanks in advance.

 

Regards

Surendra

Please do not print this email unless it is absolutely necessary.

The information contained in this electronic message and any attachments
to this message are intended for the exclusive use of the addressee(s)
and may contain proprietary, confidential or privileged information. If
you are not the intended recipient, you should not disseminate,
distribute or copy this e-mail. Please notify the sender immediately and
destroy all copies of this message and any attachments.

WARNING: Computer viruses can be transmitted via email. The recipient
should check this email and any attachments for the presence of viruses.
The company accepts no liability for any damage caused by any virus
transmitted by this email.

www.wipro.com

-- 
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. 
Please do not print this email unless it is absolutely necessary. 
The information contained in this electronic message and any attachments
to this message are intended for the exclusive use of the addressee(s)
and may contain proprietary, confidential or privileged information. If
you are not the intended recipient, you should not disseminate,
distribute or copy this e-mail. Please notify the sender immediately and
destroy all copies of this message and any attachments. 
WARNING: Computer viruses can be transmitted via email. The recipient
should check this email and any attachments for the presence of viruses.
The company accepts no liability for any damage caused by any virus
transmitted by this email. 
www.wipro.com 
-- 
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
Received on Mon Oct 11 17:08:34 2010

This archive was generated by hypermail 2.1.8 : Mon Oct 11 2010 - 17:09:01 PDT