RE: [IBIS] problem with dv/dt

hi,

   that right. But in my case i reduced it from 20ns to 2ns( which i think is
unrealistic in terms of simulation). But it was still -ve.
dv/dt came to abt 0.15/-0.5000p.

 But then after dng this i changed the default Tr and Tf values.
 I made [Tr] 1ns 1ns 1ns
        [Tf] 1ns 1ns 1ns

It now works fine. I get +ve values.

Now , can anyone tell me how are these two parameters (Tr and Sim Time) related
?

-- Vivek

                                                                                                                   
                      sanjay.bobe@wipro
                      .com To: Vivek.Kumar.Sundriyal@nsc.com, ibis@eda.org
                      Sent by: cc:
                      owner-ibis@eda.or Subject: RE: [IBIS] problem with dv/dt
                      g
                                                                                                                   
                                                                                                                   
                      12/15/04 02:18 PM
                                                                                                                   
                                                                                                                   

Hi,

Reducing simulation time will solve the negative dv/dt problem.

Regards
Sanjay

-----Original Message-----
From: owner-ibis@eda.org [mailto:owner-ibis@eda.org] On Behalf Of Vivek
Kumar Sundriyal
Sent: Wednesday, December 15, 2004 2:18 PM
To: ibis@eda.org
Subject: [IBIS] problem with dv/dt

Hi ,

  I am using s2ibis2 for solaris.

 While generating the curves, i find a problem with the [Rising
Waveform] and [Falling waveform]

 The dv/dt_r gives me values like 0.15/-40.000p.
 And the dv/dt_f also gives me 0.15/-40.000p.

 What can be the potential cause of the problem ?

  Also i dont seem to undersand the some concepts behind the generation
of the IBIS models. Can anyone suggest me any material/text book/link
which can help me with a complete theory of the IBIS model generation
process ?

 I have downloaded s2ibis2 for solaris from the website. Does the source
code need any modifications before i use them for real test cases ?

Any help will be appreciated.

Thx,
Vivek

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Received on Wed Dec 15 04:28:10 2004