[IBIS-Users] RE: [IBIS] query regarding ramp functions

Have you looked at the output waveforms to see if the have completed
transitions?

Tom Dagostino
Teraspeed Consulting Group LLC
503-430-1065
tom@teraspeed.com
www.teraspeed.com

  -----Original Message-----
  From: owner-ibis@eda.org [mailto:owner-ibis@eda.org]On Behalf Of Arnab
Hazarika
  Sent: Thursday, January 20, 2005 7:07 PM
  To: ibis@eda.org
  Cc: ibis-users@eda.org
  Subject: [IBIS] query regarding ramp functions

  Hi all ,
  I have doubt regarding the ramp down and ramp up functions.

   While creating the .s2i i have set the simulation time to be 2.5ns.

   The pulse signal thereby generated by s2ibis in rdn.spi is
      PULSE(2.5 0 0 2.5e-11 2.5e-11 5e-09 1.01e-08)
      .TRAN 2.5e-11 2.5e-09
   However if i carry ahead with pulse and transient statement then for the
other ramp functions then in the final ibis file i get
      Ramp]
  | variable typ min max
  dV/dt_r 0.61/0.13n 8.892e-21/-0.58n 0.82/89.36p

   Now dT must be greater than 0 in a Ramp specification and thereby winibis
flags off an error.

   So I needed to know how i go about this problem.

   Looking forward for your comments.
   Thanking you.

  warm regards
  arnab hazarika

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Received on Thu Jan 20 09:45:37 2005