Ich nehme mal an DU meinst kapazitive Last am ausgang.
Also ich hab zwar PSPICE seit Jahren nicht mehr benutzt,
aber der erste Schritt ist: Du ersetzt den Kapazitätswert
durch eine Variable.
http://denethor.wlu.ca/PSpice/pspice_tutorial.html
Parametric analysis allows you to run another type of analysis
(transient, sweeps) while using a range of component values using the
global parameter setting. The best way to demonstrate this is with an
example, we will use a resistor, but any other standard part would work
just as well (capacitor, inductor).
First, double-click the value label of the resistor that is to be
varied. This will open a "Set Attribute Value" dialog box. Enter the
name {RVAL} (including the curly braces) in place of the component
value. This indicates to PSpice that the value of the resistor is a
global parameter called RVAL. In order to define the RVAL parameter in
is necessary to place a global parameter list somewhere on the schematic
page. To do this, choose "Get New Part" from the menu and select the
part named param.
Place the box anywhere on the schematic page. Now double-click on the
word PARAMETERS in the box title to bring up the parameter dialog box.
Set the NAME1= value to RVAL (no curly braces) and the VALUE1= value to
the nominal resistance value. This nominal value is required, but it is
only used if the DC bias point detail is computed. Otherwise, the value
is ignored by PSpice.
Finally, go to the "Analysis Setup" menu and enable "Parametric"
analysis. Open the Parametric setup dialog box and enter the sweep
parameters: Name: RVAL Swept variable type: Global Parameter. Make sure
the other analysis type(s) are selected in the analysis setup menu
(transient, sweeps). PSpice will now automatically perform the
simulation over and over, using a new value for RVAL during each run.