Subject: RE: [IBIS-Users] Differences between '*_fixture' & '*_ref' parame ters
From: Peters, Stephen (stephen.peters@intel.com)
Date: Thu Mar 27 2003 - 08:24:45 PST
Hello Lior:
The _fixture subparameters are intended to document the fixture parasitic
in the case where the [Rising Waveform]/[Falling Waveform] data comes an
actual bench measurement. In general, the rising and falling waveform data
should be taken from simulations into a pure resistive load and the _fixture
subparameters are not used.
On the other hand, the _ref subparameters document the 'standard test
load' -- the loading conditions under which the devices propagation or
clock-to-output delay is measured. This information is required if one want
to understand how to derate a devices propagation delay due to various
output loading conditions.
Hope this helps.
Regards,
Stephen Peters
Intel Corp.
-----Original Message-----
From: Lior Aviv [mailto:RM18440@email.sps.mot.com]
Sent: Wednesday, March 26, 2003 10:02 PM
To: ibis-users@eda.org
Cc: Yoked Erlich
Subject: [IBIS-Users] Differences between '*_fixture' & '*_ref' parameters
Hi,
While creating an ibis model, I encountered a misunderstanding regarding the
differences between the '*_ref' parameters and the '*_fixture' parameters.
It seems like both are being used for loads.
In addition, I have noticed that the '*_fixture' parameters are being used
only at the 'rising/falling waveform' simulations.
Does anybody know what the differences are ?
Thanks in advance,
Lior Aviv
Motorola Semiconductor Israel.
|------------------------------------------------------------------
|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 : Thu Mar 27 2003 - 11:57:42 PST