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Now the New Simulation Profile icon is selected and ACNodal
entered as the Name followed by Create. In the Simulation Settings
dialog box, AC Sweep is selected, and the Start Frequency and End
Frequency are set at 1 kHz with 1 for the Points/Decade. Click OK,
and select the Run PSpice icon; a SCHEMATIC1 screen will result.
Exiting (X) will bring us back to the Orcad Capture window. Selecting
PSpice followed by View Output File will result in the display of
Fig. 17.56, providing exactly the same results as obtained in Example
17.16 with V 1 � 20.8 V ��126.9°. The other nodal voltage is 8.617 V
��15.09°.
FIG. 17.56
Output file for the nodal voltages for the network of Fig. 17.55.
Current-Controlled Current Source (CCCS) Our interest will
now turn to controlled sources in the PSpice environment. Controlled
sources are not particularly difficult to apply once a few important elements
of their use are understood. The network of Fig. 17.14 has a
current-controlled current source in the center leg of the configuration.
The magnitude of the current source is k times the current through resistor
R 1, where k can be greater or less than 1. The resulting schematic,
appearing in Fig. 17.57, seems quite complex in the area of the controlled
source, but once the role of each component is understood, it
will not be that difficult to understand. First, since it is the only new
element in the schematic, let us concentrate on the controlled source.
Current-controlled current sources (CCCS) are called up under the
ANALOG library as F and appear as shown in the center of Fig. 17.57.
COMPUTER ANALYSIS ⏐⏐⏐ 777