User`s guide

17
-
22 Analyzin
g
Waveforms in Probe
Analo
g
Example
In this section, basic techniques for operating Probe are
demonstrated using the analog circuit
Example.sch.
Fi
g
ure 17-5
Example Schematic Example.sch
Runnin
g
the Simulation
The simulation is run with the Bias Point Detail, Temperature,
and Transient analyses enabled. The temperature analysis is set
to 35 degrees. The transient analysis is setup as follows:
Print Step 20ns
Final Time 1000ns
Enable Fourier selected
Center Frequency 1Meg
Output Vars V(OUT2)
To start the simulation
1
Start Schematics. If Schematics is already running, be sure
you are in the schematic editor.
2
Open the following file from the directory where you
installed your MicroSim programs:
Examples\Schemat\Example\Example.sch
3
From the Analysis menu, select Simulate to start the
simulation.
The example circuit
Example.sch is provided with
your MicroSim pro
g
rams.
When shipped,
Example.sch is
set up with multiple analyses.
For this example, the AC sweep,
DC sweep, Monte Carlo/worst-
case, and small-si
g
nal transfer
function analyses have been
disabled. The specification for
each of these disabled analyses
remains intact. You can run them
in the future by selectin
g
Setup
from the Analysis menu in
Schematics and selectin
g
( ✓)
the check boxes next to the
analyses.
Note
When you run a Fourier
analysis usin
g
PSpice A/D as
specified in this example,
PSpice A/D writes the results
to the PSpice output file (.out).
You can also use Probe to
display the Fourier transform
of any trace expression by
using Probe
’
sFFTca
p
ability
By default, Probe is set to
automatically run. However, if
Probe does not run automatically
after a simulation is complete,
then from the Analysis menu,
select Run Probe.
If Probe is set to show traces for
all markers on startup, you will
see the V(OUT1) and V(OUT2)
traces when the Probe window
displays. To clear these traces
from the plot, do the followin
g
:
from the Trace menu, select
Delete All.
or press !