User`s guide

4
-
16 Creatin
g
and Editin
g
Models
Runnin
g
the Parts Utilit
y
Alone
If you want to:
• model a new part and use the part in any schematic (and
automatically create a symbol),
• create a model and have the model definition available to
any design (do not create a symbol), or
• examine or verify the characteristics of a given model
without using PSpice A/D,
then run the Parts utility alone. This means that the model you
are creating or examining is not currently tied to a part instance
on your schematic or to a symbol editing session.
Note
You can only edit models for device types that the
Parts utility supports. See
Parts-Supported Device
Types on page 4-12 for details.
Startin
g
the Parts utilit
y
To start the Parts utilit
y
alone
1
From the MicroSim program folder, select Parts.
2
From the File menu, select Open/Create, and enter an
existing or new model library name.
3
From the Part menu, select New, Copy, or Import to load a
device model.
Enablin
g
and disablin
g
automatic s
y
mbol
creation
Symbol creation in the Parts utility is optional. By default,
automatic symbol creation is enabled. However, if you
previously disabled symbol creation, you will need to enable it
before creating a new model and symbol.
To automaticall
y
create s
y
mbols for new models
1
From the Options menu, select Symbol Creation Setup.
After you have selected the part
that you want to model, you can
proceed with enterin
g
data sheet
information and model fittin
g
as
described in
How to Fit Models
on page 4-14.
If you have already started the
Parts utility from Schematics and
want to continue workin
g
on new
models, then:
1
Save the opened model
library.
2
Open or create a different
model library.
3
Get a model, or create a new
one.
Instead of usin
g
the MicroSim
default symbol set for new
models, you can have the Parts
utility use your own set of
standard symbols. To find out
more, see
Basing New Symbols
On a Custom Set of Symbols on
page 5-13.