How do I make generic spice models work in multisim?

[BobyCV]

Dear Mr.Garret,

Thanks for the post.It was informative.

I need your advice and help on the following.

I have a small subcircuit as shown below.

The diode D1 parameters are as given below

+  IS=2.8e-009 N=44 RS=0.003866 BV=1e+030 IBV=0.001

In need make a component out of it.

When I followed NI tutorials and put the Pos and Neg pins on to the terminals and made  a component,

Instead of giving a diode like IV curve,the DC sweep analysis is giving a Resistor like IV curve.

The above circuit works fine if Vdd is put at Pos and Gnd is put at Neg and then apply DC sweep.

Please help me make a component which should work the same way as the above circuit.

I think I am going wrong somewhere which I cannot comprehend by myself.

Regards,

boby.

[BobyCV]

can someone answer and help please!!:manmad:

[Tien_P]

Hi Bob,

To create a model from your circuit do this:

1.  Double click on the diode and make sure it have all the SPICE parameter that you want

2.  From the menu, select Transfer>>export netlist, Multisim will create a .cir file

3.  Open the .cir file with Notepad

4.  On the first line add this:  .subkct model pos neg

5.  scroll to the bottom and type this:  .ends

6.   In Notepad do a Edit>>Select all and then Edit>>Copy

7.   In Multisim go through the component wizard to create the component. Here is the link to the component creation tutorial

http://zone.ni.com/devzone/cda/tut/p/id/3173

8.  In the tutorial, when you get to Step 6, paste the model into the "model data' area