
Usin
the Create Subcircuit Command 4
-37
Usin
the Create
Subcircuit Command
The Create Subcircuit command in the schematic editor creates
a subcircuit netlist definition for the displayed level of hierarchy
and all lower levels in your schematic.
The schematic editor does the following things for you:
• Maps any named interface ports at the active level of
hierarchy to terminal nodes in the PSpice .SUBCKT
statement.
• Writes the subcircuit definition to a file named
schematic_name.sub.
Before you can use the subcircuit definition in your schematic,
you need to:
• Create a symbol for the subcircuit.
• Configure the schematic_name.sub file so PSpice A/D
knows where to find it.
To create a subcircuit definition for a portion of
our schematic
1
Move to the level of hierarchy for which you want to create
a subcircuit (.SUBCKT) definition.
2
From the Draw menu, select Get New Part.
3
Place interface ports for your subcircuit:
• IF_IN for input ports
• IF_OUT for output ports
4
From the File menu, select Save.
5
From the Tools menu, select Create Subcircuit to generate
the subcircuit definition and save it to
schematic_name.sub.
6
In the schematic editor, from the Analysis menu, select
Library and Include Files, and then configure
The Create Subcircuit command
will not help you create a
hierarchical desi
n. You need to
do this yourself before usin
the
Create Subcircuit command. For
information on hierarchical
schematics and how to create
them, refer to your
MicroSim
Schematics User’s Guide
.
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