User Guide

Parametric analysis
275
I2 = 0a
T3 = 10.1ms
I3 = 1a
Place an instance of a resistor and set its VALUE property
to the expression, {R}. To define R as a global parameter,
place a PARAM pseudocomponent and use the Property
Editor to create a new property R and set its value to 0.5.
Place an inductor and set its value to 1H, place a capacitor
and set its value to 1, and place an analog ground symbol
(0 from SOURCE.OLB). Wire the schematic symbols
together as shown in Figure 68.
Running the simulation
Run PSpice with the following analyses enabled:
After setting up the analyses, start the simulation by
choosing Run from the PSpice menu.
Using performance analysis to plot overshoot and
rise time
After performing the simulation that creates the data file
RLCFILT.DAT, you can calcualte the specified
performance analysis goal functions.
When the simulation is finished, a list appears containing
all of the sections (runs) in the data file produced by
PSpice. To use the data from every run, select All and click
OK in the Available Selections dialog box. In the case of
Figure 69, the trace I(L1) from the ninth section was added
by specifying the following in the Add Traces dialog box:
I(L1)@9
transient print step: 100ms
final time: 20s
parametric swept var. type: global parameter
sweep type: linear
name: R
start value: 0.5
end value: 1.5
increment: 0.1
To display the Add Traces dialog box, from
the Trace menu, choose Add Trace or click
the Add Trace toolbar button.
Pspug.book Page 275 Wednesday, November 11, 1998 1:14 PM