RE: [IBIS-Users] RE: IBIS models enquiry

From: NG,MEI-YEE <mei-yee.ng_at_.....>
Date: Thu Oct 05 2006 - 21:16:03 PDT
Hi Ambrish,


Regarding the first item from my mail below on s2ibis2, I managed to get
it run finally. I found out that I need to change the model name P and N
to pfet and nfet respectively to get the tools recognizing them. Is this
a limitation? However, after I finished running, it displays this
message: Opening file inv.ibs for writing... memory fault. What does
this mean? How do I get around this error?

 

On the other hand, kindly advice on the javadir variable as mentioned in
my previous mail below.

 

Thank you.

 

Best regards,

Mei Yee

 

________________________________

From: owner-ibis-users@server.eda.org
[mailto:owner-ibis-users@server.eda.org] On Behalf Of NG,MEI-YEE
Sent: Friday, October 06, 2006 11:49 AM
To: Ambrish Varma; Mirmak, Michael; ibis-users@server.eda.org;
ibis-info@server.eda.org
Subject: [IBIS-Users] RE: IBIS models enquiry

 

Hi Ambrish,

 

I actually used s2ibis2 version because I did not have Java installed in
my Linux machine. I found that it somehow could not recognize my model
file. Kindly refer to the attached spectre1.mod file which I used as my
model file. Is there anything wrong with the syntax? It doesn't seem to
recognize the model that I used in my inv.sp (refer attached) file even
though it is defined in "ag100_fet_all.scs" file.

 

On the other hand, I am also trying to run using s2ibis3. I have
downloaded Java 2 RE version 1.4.2_12. I went to the directory where I
copied the s2ibis2_v1_1 and switched to cshell. I typed the following
command which is stated in the README file:

 

source s2ibis3.csh -s2ibis3 buffer.spi

 

The message I obtained in return:

Java version "1.4.2_12"

Running Java

Javadir: Undefined variable

 

Is there anything wrong in the way I executed the commands?

 

Kindly advice.

 

Thank you.

 

Best regards,

Mei Yee

 

 

________________________________

From: Ambrish Varma [mailto:akvarma@ncsu.edu] 
Sent: Friday, October 06, 2006 10:23 AM
To: NG,MEI-YEE; 'Mirmak, Michael'; ibis-users@eda.org; ibis-info@eda.org
Subject: RE: IBIS models enquiry

 

Hello Mei Yee,

Which version of s2ibis are you using? s2ibis2 OR s2ibis3? If you are
using s2ibis2, please download s2ibis3 from the link Michael mentioned
before. If you are using s2ibis3, please attach the log file
(s2ibis3.log) that is created at the end of the s2ibis3 run.

Thanks,

Ambrish. 

 

--Ambrish Varma

North Carolina State University

ph(919)513-2015, fax(919)515-2285

________________________________

From: NG,MEI-YEE [mailto:mei-yee.ng@avagotech.com] 
Sent: Thursday, October 05, 2006 8:42 PM
To: Mirmak, Michael; ibis-users@eda.org; ibis-info@eda.org;
akvarma@ncsu.edu
Subject: RE: IBIS models enquiry

 

Dear Michael,

 

I am using s2ibis to point to my own model file, but it always gives me
a syntax error with "unknown parameter name" whereas I have already
defined them in my model file using 'parameters' keyword. For example:

 

Parameters\

RCASE_MIN=0\

RCASE_NOM=1\

RCASE_MAX=0

 

But looking through the pct.msg file, it prompts syntax error. I don't
understand. Is there anything wrong with the way I defined the
parameters? How come the parameters just can't seem to be taken into
account?

 

Looking forward to your reply.

 

Thanks.

 

Best regards,

Mei Yee

 

________________________________

From: Mirmak, Michael [mailto:michael.mirmak@intel.com] 
Sent: Friday, October 06, 2006 12:35 AM
To: NG,MEI-YEE; ibis-users@server.eda.org; ibis-info@server.eda.org;
akvarma@ncsu.edu
Subject: RE: IBIS models enquiry

 

Mei Yee,

 

S2IBIS has been updated considerably since S2IBIS2  You may wish to
visit the website for S2IBIS3:
http://www.ece.ncsu.edu/erl/ibis/s2ibis3/s2ibis3.htm

 

- Michael Mirmak

  Intel Corp.

  Chair, EIA IBIS Open Forum

 

________________________________

From: owner-ibis-info@server.eda.org
[mailto:owner-ibis-info@server.eda.org] On Behalf Of NG,MEI-YEE
Sent: Thursday, October 05, 2006 01:48
To: ibis-users@server.eda.org; ibis-info@server.eda.org;
akvarma@ncsu.edu
Subject: RE: IBIS models enquiry

Dear Sir/Madam,

 

I have replaced the examples' spectre.mod file so that it will point to
my own .scs model file. Right now, my own spectre.mod file only has one
line : 

include "/usr/../../../ag100_mos.scs" section=nom

 

However, when I run the s2ibis software, it does not seem to recognize
the model file and keeps on giving error that my component is of
undefined model.

 

Kindly advice.

 

Thank you.

 

Best regards,

Mei Yee

 

________________________________

From: NG,MEI-YEE 
Sent: Wednesday, October 04, 2006 3:22 PM
To: 'ibis-users@eda.org'; 'ibis-info@eda.org'
Subject: IBIS models enquiry

 

Dear Sir/Madam,

 

I am an analog IC design engineer currently learning how to generate
IBIS models for my circuit. I have downloaded s2ibis2 v1.1 and tried
running some examples from there. However, there are some questions that
I would like to be clarified:

 

1)       I'm using a spectre simulator and my circuit and model files
are also meant for spectre language. I noticed that the command input
file (.s2i) takes in a spice (.sp) file, which is rather similar to the
spectre netlist. Is it possible to run the software using my spectre
netlist as input? Or do I need to generate a spice-compatible netlist
file?

2)       I also have my own model files (.scs). Can I replace the
example's spectre.mod with my own model file and change the extension to
.mod? 

3)       The s2ibis2 software helps me to run all the necessary
simulations and convert them to ibis format automatically. Is there any
other method where I can use my own simulation output and convert them
into ibis format? i.e. is there any converter which takes in simulation
output data and converts them into ibis file?

 

I hope that my questions are not confusing. Your feedback and assistance
are highly appreciated.

 

Thank you very much in advance.

 

Best regards,

Mei Yee 

IC Design Engineer

Avago Technologies


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Received on Thu Oct 5 21:16:33 2006

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