User`s guide

Tools to Create and Edit Models 4
-7
Tools to Create and Edit
Models
There are three tools that you can use to create and edit model
definitions. Use the:
• Parts utility when you want to:
• derive models from data sheet curves provided by
manufacturers, or
• modify the behavior of a Parts-supported model.
• Model editor when:
• model parameters are already defined (such as for
models from a vendor), or
• the model is not supported by the Parts utility, or
• you want to edit the PSpice command syntax (text) for
.MODEL and .SUBCKT definitions.
• Create Subcircuit command when you have a hierarchical
level in your schematic that you want to set up as an
equivalent symbol with behavior described as a subcircuit
netlist (.SUBCKT syntax).
Note
If you created a subcircuit definition usin
g
the
Create Subcircuit command and want to alter it,
use the model editor to edit the definition, or modify
the ori
g
inal hierarchical schematic and run Create
Subcircuit a
g
ain to replace the definition.
For a description of models
supported by the Parts utility,
see
Parts-Supported Device
Types on page 4-12.
Note
The Parts utility
is not included in
PSpice A/D Basics+.
The Create Subcircuit command
will not help you create a
hierarchical desi
g
n. You need to
do this yourself before usin
g
the
Create Subcircuit command. For
information on hierarchical
schematics and how to create
them, refer to your
MicroSim
Schematics User’s Guide
.