[SI-LIST] Re: IBIS to behavioral SPICE conversion
- From: "Muranyi, Arpad" <Arpad_Muranyi@xxxxxxxxxx>
- To: "si-list@xxxxxxxxxxxxx" <si-list@xxxxxxxxxxxxx>
- Date: Wed, 19 Mar 2014 06:27:52 +0000
Sanjay ,
You would have to convert the voltages in the V-t table to a
scaling coefficient table (K-t) so that at the beginning of
the V-t table the coefficient is zero and at the end it is one.
You need to solve for two unknowns using two equations
to do this for the two rising and the two falling waveforms.
One turns on the PU I-V table and off the PD I-V table for
the rising waveforms, and the other way around for the falling
waveforms.
Then using the input stimulus signal you trigger these K-t
tables every time there is a transition on the stimulus.
I was able to do this with the controlled sources in HSPICE
to prove the concept of IBIS modeling before the specification
was first written. But I am not sure whether you have everything
you need to do this in Berkeley-SPICE or NGSPICE. It wasn't
easy in HSPICE either... Using Verilog-A or VHDL-AMS would be
easier in some ways because those languages support events and
the related features much better than the E,F,G,H sources in
SPICE.
You can read about this a little bit in the first part of this
presentation:
http://www.eda.org/ibis/summits/jun03b/muranyi1.pdf
I hope this helps,
Arpad
====================================================================
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
Behalf Of Sanjay G
Sent: Wednesday, March 19, 2014 12:26 AM
To: info@xxxxxxxxxxxxxxxxxxx
Cc: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: IBIS to behavioral SPICE conversion
I am sorry, you got me wrong.. Kindly assume that I do not have access to
Hspice tool.
I want to use only open-source spice simulator Berkley spice or ngspice.
This is not about IBIS to hspice conversion. this is about IBIS to
behavioral-spice model conversion.
I was thinking to use VCCS (in PWL format) for V-I table data. but what to do
with V-t table data?
Thanks
On Wednesday, March 19, 2014 10:46 AM, PristineSignals -IBIS Modeling Experts
<info@xxxxxxxxxxxxxxxxxxx> wrote:
I wouldn't recommend it as in conversion from IBIS to HSpice you loose a
lot of detailed data points. But if you must then try converting to HSPICE
then from their tweak the code for Berkeley SPICE.
Hope that helps.
Best,
Abdulrahman Rafiq
IBIS Modeling Consultant
pristinesignals.com
Sent from my Samsung Galaxy device
On Mar 19, 2014 10:08 AM, "Sanjay G" <myworld_sg@xxxxxxxxx> wrote:
> Dear Experts,
> I want to use Berkley spice or ngspice tool for my simulations. but these
> open-source spice simulator doesn't support IBIS model.
> How can I convert back IBIS model into Behavioral SPICE model to use them
> in open-source spice simulators.
> Thanks
> Sanjay
>
> ------------------------------------------------------------------
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List forum is accessible at:
http://tech.groups.yahoo.com/group/si-list
List archives are viewable at:
//www.freelists.org/archives/si-list
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
