RE: [IBIS] hspice supports c_fixture ??

Vivek,
 
The observation you made reflects correct behavior for
a driver.
 
The whole point in IBIS models is that the waveform
tables of a driver model must be reproduced by the
algorithm faithfully regardless of what the value
of C_comp is in the driver model.  The capacitance
of a driver model is not supposed to "load" the V-t
table of the driver itself.
 
On the other hand, when you change the C_comp of a
receiver model, the waveform you see at that receiver
should change depending on C_comp.
 
Arpad
======================================================

________________________________

From: owner-ibis@server.eda.org [mailto:owner-ibis@server.eda.org] On Behalf Of Xuefeng Chen
Sent: Sunday, May 11, 2008 8:24 PM
To: Vivek kumar Singh; ibis@server.eda.org
Subject: RE: [IBIS] hspice supports c_fixture ??



Hi Vivek,

  Hspice do support C_fixture. 

  You can contact Synopsys AC for this problem. Or sent me you ibis model and test case.

  Note this forum is not suitable for discussion of any special EDA tool.  So please just sent the case to me alone . 

Thanks,

Xuefeng 

 

 

From: owner-ibis@eda.org [mailto:owner-ibis@eda.org] On Behalf Of Vivek kumar Singh
Sent: 2008年5月9日 22:36
To: ibis@eda.org
Subject: [IBIS] hspice supports c_fixture ??

 

Experts,

 

I need your help regarding c_fixture in USB1.1 ibis model.

 

While modeling with C_fixture in my Ibis, I can’t see any change in my simulation result. 

 

Could you please let me know whether hspice supports C_fixture parameter in IBIS or not? 

 

Thanks,

Vivek  


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