User Guide

Chapter 4 Creating and Editing Designs
80
Finding Parts
Parts represent electrical devices such as resistors,
operational amplifiers, diodes, voltage sources, and
digital gates that comprise the circuit diagram.
The graphical representation of a part is a symbol stored in
a symbol library.
For those parts with a simulation model available, the
model definition is stored in a model library.
For parts applicable to PCB layout, the package definition is
stored in the package library.
You can use symbols supplied with PSpice Schematics, or
you can create your own symbols and store them in
user-defined symbol libraries. You can select a symbol
from a library by name or by browsing the list of available
parts.
The available parts are only those contained in configured
libraries. If you have a library of parts and they are not
available, you need to add the library to the list of
configured libraries. Refer to Configuring Symbol Libraries
on page 3-42.
Simu
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When you are drawing a design for
simulation, keep the following in mind:
• The symbols that you place must have
corresponding simulation models
associated with them.
• The design will need sources of
stimulus.
• For any part that has an associated
simulation model, unmodeled pins are
indicated by a broken pin.