User Guide

Chapter 2 Simulation examples
40
Figure 20 dB magnitude curves for “gain” at Mid and Out.
To display a Bode plot of the output voltage, including phase
1 From Capture’s PSpice menu, point to Markers, point
to Advanced and choose Phase of Voltage.
2 Place a Vphase marker on the output next to the Vdb
marker.
3 Delete the Vdb marker on Mid.
4 Switch to PSpice.
In the Probe window, the gain and phase plots both
appear on the same graph with the same scale.
5 Click the trace name VP(Out) to select the trace.
6 From the Edit menu, choose Cut.
7 From the Plot menu, choose Add Y Axis.
8 From the Edit menu, choose Paste.
The Bode plot appears, as shown in Figure 21.
Note Depen
d
ing upon w
h
ere t
h
e Vp
h
ase
marker was placed, the trace name may be
different, such as VP(Cout:2), VP(R4:1), or
VP(R4:2).
For more in
f
ormation on Pro
b
e win
d
ows
and trace expressions, see Chapter 13,
Analyzing waveforms.
press C+x
press C+V
Pspug.book Page 40 Wednesday, November 11, 1998 1:14 PM