RE: [IBIS-Users] Hspice problem for IBIS simulations

Kiran,
 
In that case there is nothing wrong with the
results you are getting from HSPICE.  If you
want to see a negative voltage on the output
of the B-element, you should define a negative
[Pulldown Reference] so that the pulldown IV
curve's origin would be that negative voltage
that you want to see.
 
Arpad
===============================================


________________________________

From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf Of seshadri.kirankumar@wipro.com
Sent: Tuesday, March 14, 2006 8:52 PM
To: ibis-users@eda.org
Subject: RE: [IBIS-Users] Hspice problem for IBIS simulations



Hi Arpad,

   

     I have used following option in IBIS model

 

[Voltage Range]       1.8V            1.62V         1.89V

 

    So VSS is grounded i.e 0V 

 

Let me know if you need  further information 

 

Thanks & Best Regards

Kiran Kumar

 

________________________________

From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf Of Muranyi, Arpad
Sent: Wednesday, March 15, 2006 8:31 AM
To: ibis-users@eda.org
Subject: RE: [IBIS-Users] Hspice problem for IBIS simulations

 

Kiran,

 

What is the voltage on the node "VSS"?  What

is the value inside the IBIS file for the

[Voltage Range] or [Pulldown Reference] keywords?

 

Arpad Muranyi

Intel Corporation

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

 

________________________________

From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf Of seshadri.kirankumar@wipro.com
Sent: Monday, March 13, 2006 2:22 AM
To: ibis-users@eda.org
Subject: [IBIS-Users] Hspice problem for IBIS simulations

Hi Experts,

    

     I have generated an Output Buffer IBIS model whose output swing is  +V to -V ,  IBIS model is Good to give out such +V to -V response depending on appropriate load (75 ohms), this I verified with some SI tool(spectra quest) using some dummy Input IBIS model , But when I perform simulations  using Hspice  I am not seeing +V to -V swing, instead it is swinging improperly from +V to 0  I have attached the control deck for that simulation on IBIS model.  

      Could any one of you let me know whether my deck is proper or do I need to add anything in HSPICE deck to see intended functionality? 

 

Thanks in advance for your help on this 

 

Best Regards

Kiran Kumar

         


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