FreeLists / si-list / [SI-LIST] IBIS

[Darshan Mehta <darshanmehta2k@xxxxxxxxx>]

Hello Everybody,

 

I have a question on IBIS creation process. We have two kinds of cell in the 
design, Core cell and the IO Cell. To characterize the cell to create IBIS 
model, whether we should consider the core as well as IO cell or only the IO 
cell?

 

I have a SPICE netlist of Buffer (two inverters) and I want to create the IBIS 
file using Spice simulation but I am not getting the correct reading for 
Pull-up and Pull-down IV curve. Here is the netlist;

 

vdd1 VDD 0 3.3V
vss GND 0 0V

.subckt INV in      out
M1 out     in      GND     GND     NMOS    L=1     W=10
M2 out     in      VDD     VDD     PMOS    L=1     W=20
.ends INV


X1 pin.1 ext1 INV
X2 ext1 pin.2 INV

 

I am not sure if I am using the correct cell or not. This is a core cell and I 
don't have IO cell with me. Could you please help me to understand the IBIS 
creation using SPICE measurement? Thanks a lot.

 

Best Regards,

Darshan Mehta

                
---------------------------------
Yahoo! for Good
 Click here to donate to the Hurricane Katrina relief effort. 

------------------------------------------------------------------
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:
http://www.freelists.org/webpage/si-list

For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field

List FAQ wiki page is located at:
                http://si-list.org/wiki/wiki.pl?Si-List_FAQ

List technical documents are available at:
                http://www.si-list.org

List archives are viewable at:     
                http://www.freelists.org/archives/si-list
or at our remote archives:
                http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
                http://www.qsl.net/wb6tpu