User`s guide

13
-
18 Monte Carlo and Sensitivity/Worst-Case Analyses
To verif
y
that the DC sweep and Monte Carlo
anal
y
ses are enabled
1
In the Analysis Setup dialog box, make sure that the check
box next to the DC Sweep and to the Monte Carlo/Worst
Case buttons are selected (
✓). If not, click them to enable
the analyses.
2
Click OK.
Runnin
g
the anal
y
sis and viewin
g
the results
Run the simulation and analyze the results in Probe.
To complete setup, simulate, and view results
1
In Schematics, from the Analysis menu, select Probe setup.
a
On the Probe Startup tab, make sure the Automatically
Run Probe after Simulation option and the Show All
Markers options are chosen.
2
From the Analysis menu, select Simulate.
When complete, Probe automatically starts. Because PSpice
A/D ran a Monte Carlo analysis, PSpice A/D saved multiple
runs or sections of data. These are listed in the Available
Sections dialog box.
3
In Probe, in the Available Sections dialog box, click All, and
then OK.
4
To display current through the Meter voltage source, do the
following:
a
In Schematics, from the Markers menu, select Mark
Current into Pin.
b
Place a current marker on the left-hand pin of the Meter
source.
5
Return to the Probe window to see the family of curves for
I(Meter) as a function of P.
Note
For more on analyzin
g
Monte Carlo results in
Probe, see the next section on Monte Carlo
histo
g
rams.
or press !
Another way to view the family of
curves without usin
g
schematic
markers is as follows:
1
In Probe, from the Trace
menu, select Add.
2
In the Simulation Output
Variables list, double-click
I(Meter).