RE: [IBIS] Model Corner C_comp BIRD Discussion

To All,
I am personally support any explicit clarification for the C-Comp parameter
That can help to clarify
- how this parameter were obtained for specific corner (Process/Voltage/Temperature simulation condition) and
- how this particular parameter could be correlated against to simulation and/or silicon measured values.

Most of customers are concerned of accuracy of this parameter for particular conditions, especially for high speed frequency depended interfaces.
To make sure IBIS model accuracy.
Existing IBIS standard definition that allow mix min/max/typ c_comp values
based on actual absolute values (not as they were measured really)
are confused mostly instead of give a clarity for concerned question.

What I am really propose to introduce some advanced table-based capacitance model, like as CCS (Composite Current Source model) or ECSM (Enhanced Current Source Model) considered all possible conditions.

Regards,
Sergey Nikonchuk
Characterization and View Generation
TSO / DT / DC / Libraries
www.freescale.com
               
Phone:  +7 (495) 589 1839
Mobile: +7 (916) 993 3467

-----Original Message-----
From: owner-ibis@eda.org [mailto:owner-ibis@eda.org] On Behalf Of Bob Ross
Sent: Thursday, September 15, 2011 1:10 AM
To: ibis@eda.org
Subject: [IBIS] Model Corner C_comp BIRD Discussion

To IBIS Reflector

This note is to open for discussion and questions the pending C_Comp BIRD133:

  http://www.eda.org/pub/ibis/birds/bird133.txt

The proposal suggests an optional keyword syntax that allows specifying the C_comp entries extracted from and aligned directly with PVT
(process/voltage/temperature) corners to be consistent with the other [Model] electrical content (I-V and V-T tables).

Other alternatives, along with most other suggestions from a long e-mail thread last September, 2010 are documented in the ANALYSIS and the OTHER BACKGROUND INFORMATION sections.

Bob

--
Bob Ross
Teraspeed Consulting Group, LCC
http://www.teraspeed.com
bob@teraspeeed.com
Direct : 503-246-8048
Teraspeed Labs: 503-430-1065
Headquarters: 401-284-1827
Teraspeed is a registered service mark of Teraspeed Consulting Group LLC
--
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
-- 
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