Re: [IBIS] How we can model startup time in IBIS.

Hello Akhilesh,
I went through all the e-mail trail related to this subject.

I believe you can use driver schedule to give the start time like this.
Having only one model defined in the driver schedule and giving suitable 
delays needed as below.

[Driver Schedule] |
 Model_Name Rise_on_dly Rise_off_dly Fall_on_dly Fall_off_dly
 |model_name          3ns                X         3ns                    X

Pls refer to the cookbook to cook this spicy!

Hope this suits your need!

Thanks,
Anguraj

Akhilesh CHANDRA wrote:

>Hello Tony,
>
>  Thanx for your reply. Initial delay is not important for SI simulations
>but if it's missing in our model then it's difficult to match spice and IBIS
>results also few customers  use these models for delay calculation if I
>don't support this startup time then customer have only 300ps delay while in
>silicon it's 3.3ns. 
>
>Regards
>Akhilesh
>
>-----Original Message-----
>From: owner-ibis@server.eda.org [mailto:owner-ibis@server.eda.org] On Behalf
>Of Dunbar, Tony
>Sent: Monday, May 14, 2007 10:22 PM
>To: ibis@server.eda-stds.org
>Subject: RE: [IBIS] How we can model startup time in IBIS.
>
>Hi Akhilesh,
>
>I've pondered this for a little while and all I can come up with is to ask
>why is this an important or even relevant functional detail to be included
>in a signal integrity simulation, presuming it is a signal integrity
>simulation you are wanting to do?
>
>An "initial delay" can be incorporated into the stimulus of some SI
>simulators but that is really intended to provide for driver-to-driver skew,
>whereas your brief description refers to "startup".
>
>Regards,
>Tony
>
>-----Original Message-----
>From: owner-ibis@server.eda.org [mailto:owner-ibis@server.eda.org] On Behalf
>Of Akhilesh CHANDRA
>Sent: Monday, May 14, 2007 4:18 AM
>To: ibis@server.eda-stds.org
>Cc: Akhilesh CHANDRA
>Subject: [IBIS] How we can model startup time in IBIS.
>
> 
>
>Hello Experts,
>
>  I am doing IBIS model of an IO operating at 800MHZ frequency. It have
>startup time of 3nsec. After 3ns design gives output of 800mhz frequency. If
>I model this time in waveform database of IBIS models the I have over
>clocking issue and design is not work at this high frequency. Can you help
>me to model this startup time. Is anyone make IBIS model of such designs.
>
>Regards
>Akhilesh
>
>
>--
>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
>
>
>  
>



-- 
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