User Guide

Chapter 2 Simulation examples
50
9 Click the Next> button or the Finish button.
A plot of the 3dB bandwidth vs. Rval appears.
10 Change the x-axis to log scale:
a From the Plot menu, choose Axis Settings.
b Click the X Axis tab.
c Under Scale, choose Log.
d Click OK.
To plot gain vs. Rval manually
1 From the Plot menu, choose Add Y Axis.
2 From the Trace menu, choose Add to display the Add
Traces dialog box.
3 In the Functions or Macros frame, select the Goal
Functions list, and then click the Max(1) goal function.
4 In the Simulation Output Variables list, click V(out).
5 In the Trace Expression text box, edit the text to be
Max(Vdb(out)), then click OK.
PSpice displays gain on the second y-axis vs. Rval.
Figure 26 shows the final performance analysis plot of 3dB
bandwidth and gain in dB vs. the swept input resistance
value.
Figure 26 Performance analysis plots of bandwidth and gain vs.
Rval.
Double-click the x-axis.
or press I
The Trace list includes goal functions only in
performance analysis mode when the
x-axis variable is the swept parameter.
Pspug.book Page 50 Wednesday, November 11, 1998 1:14 PM