Re: [IBIS-Users] way to extract rising and falling waveform in differential cells

Hello Fred,

  I want to know how we can simlate rising and falling waveform database
for a cell that have swing between 0.51v to 1.27V. The supply use are 0V
to2.5V. During the extraction I put resistence to 1.76 and 0.51V insted
of 2.5V to 0V(in typ case). Again my models are good at lower
frequency(15MHZ) but become worst at high frequency(622Mhz).

  Is any one give ibis models of such type of cells with rising and
falling database. Is any extra precaution is required to make model for
a cell that is working till 1GHZ.
 If anyone can send me such type of models it help me.
Regards
Akhilesh
Fred Balistreri wrote:

>Are you asking about the test circuit or a software program that does this?
>
>Best Regards,
>Fred
>----- Original Message -----
>From: "Akhilesh CHANDRA" <akhilesh.chandra@st.com>
>To: <ibis-users@eda.org>
>Cc: "Akhilesh CHANDRA" <akhilesh.chandra@st.com>
>Sent: Tuesday, December 14, 2004 5:47 AM
>Subject: [IBIS-Users] way to extract rising and falling waveform in
>differential cells
>
>
>
>
>>Hello Friends,
>>
>> I am devloping IBIS model of a differential cell having swing 300mv.
>>when I run simulation at 300mhz then I find out there is a transition
>>shift between IBIS and spice result. In my model I give just ramp
>>database dv/dt for transition. In my view this problem may be resolve if
>>I give complete rising and falling waveform in my models.
>> Is anyone know how we can extract rising and falling waveform for a
>>cell that have differential swing or any other way to reduce this shift.
>>
>> My results are attached with the mail.
>>
>>regards
>>Akhilesh
>>
>>
>>
>>
>>
>
>
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Received on Sat Dec 18 22:10:32 2004