User`s guide

Contents vii
Entering data sheet information . . . . . . . . . . . . . . . . . . . . . 4-24
Extracting model parameters . . . . . . . . . . . . . . . . . . . . . . 4-27
Adding curves for more than one temperature . . . . . . . . . . . . . 4-28
Completing the model definition . . . . . . . . . . . . . . . . . . . . 4-29
Using the Model Editor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-29
Changing Model Properties . . . . . . . . . . . . . . . . . . . . . . . . . 4-30
Editing .MODEL definitions . . . . . . . . . . . . . . . . . . . . . . 4-30
Editing .SUBCKT definitions . . . . . . . . . . . . . . . . . . . . . . 4-31
Changing the model name . . . . . . . . . . . . . . . . . . . . . . . 4-31
Running the Model Editor from the Symbol Editor . . . . . . . . . . . . . 4-31
Starting the model editor . . . . . . . . . . . . . . . . . . . . . . . . 4-31
Saving global models . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32
Running the Model Editor from the Schematic Editor . . . . . . . . . . . 4-33
What is an instance model? . . . . . . . . . . . . . . . . . . . . . . . 4-33
Starting the model editor . . . . . . . . . . . . . . . . . . . . . . . . 4-34
Saving local models . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-34
Example: Editing a Q2N2222 Instance Model . . . . . . . . . . . . . . . 4-35
Starting the model editor . . . . . . . . . . . . . . . . . . . . . . . . 4-35
Editing the Q2N2222-X model instance . . . . . . . . . . . . . . . . 4-35
Saving the edits and updating the schematic . . . . . . . . . . . . . . 4-36
Using the Create Subcircuit Command . . . . . . . . . . . . . . . . . . . . . 4-37
Changing the Model Reference to an Existing Model Definition . . . . . . . . 4-38
Reusing Instance Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-39
Reusing Instance Models in the Same Schematic . . . . . . . . . . . . . . 4-40
Making Instance Models Available To All Schematics . . . . . . . . . . . 4-40
Configuring Model Libraries . . . . . . . . . . . . . . . . . . . . . . . . . . 4-41
The Library and Include Files dialog box . . . . . . . . . . . . . . . . . . 4-41
How PSpice A/D Uses Model Libraries . . . . . . . . . . . . . . . . . . 4-43
Search order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-43
Handling duplicate model names . . . . . . . . . . . . . . . . . . . . 4-43
Adding Model Libraries to the Configuration . . . . . . . . . . . . . . . 4-44
Changing Local and Global Scope . . . . . . . . . . . . . . . . . . . . . 4-45
Changing Model Library Search Order . . . . . . . . . . . . . . . . . . . 4-45
Changing the Library Search Path . . . . . . . . . . . . . . . . . . . . . 4-46
Creatin
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Symbols for ModelsChapter 5
Chapter Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
What’s Different About Symbols Used for Simulation? . . . . . . . . . . . . 5-3
Ways to Create Symbols
for Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Preparing Your Models for Symbol Creation . . . . . . . . . . . . . . . . . . 5-5