User`s guide

DC Sweep 9
-5
Settin
g
Up a DC Stimulus
To run a DC sweep or small-signal DC transfer analysis, you
need to place and connect one or more independent sources and
then set the DC voltage or current level for each source.
To set up a DC stimulus
1
Place and connect one of these symbols in your schematic:
2
Double-click the symbol instance. A dialog box appears
listing the attribute settings for the symbol instance.
3
Define the DC specification as follows:
For volta
g
e input
Use
this...
When you are runnin
g
...
VDC A DC sweep and/or transfer function analysis
only.
VSRC Multiple analysis types including DC sweep
and/or transfer function.
For current input
Use
this...
When you are runnin
g
...
IDC A DC sweep and/or transfer function analysis
only.
ISRC Multiple analysis types including DC sweep
and/or transfer function.
Set this
attribute...
To this value...
DC
DC_level
where
DC_level
is in volts or amps
(units are optional).
If you are plannin
g
to run an AC
or transient analysis in addition
to a DC analysis, see the
followin
g
:
•
Using time-based stimulus
symbols with AC and DC
attributes on page 3-25 for
other source symbols that
you can use.
•
Using VSRC or ISRC
symbols on page 3-26 to find
out how to specify the TRAN
attribute for a time-based
input si
g
nal when usin
g
VSRC or ISRC symbols.