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N A
1 �
2 �
2
d
1 �
2 �
Each resulting parallel combination in Fig. 17.54 will have the following
impedance:
3 ��j 6 �
Z′ � �� � 1.5 ��j 3 �
2
Z T
2 �
1 �
1 3
6 �
3 �
6 �
3 �
FIG. 17.53
Converting the Y configuration of Fig. 17.50 to a �.
3 �
2
6 � 6 �
3 �
6 �
3 �
3 �
6 �
3 � 6 �
1 3
FIG. 17.54
Substituting the � configuration of Fig. 17.53 into the network of Fig. 17.50.
2(Z′) 2Z′
and ZT � � � �
3
2(1.5 ��j 3 �)
� �� � 1 ��j 2 �
3
which compares with the above result.
2
Z′(2Z′)
� �
Z′ � 2Z′
3Z′
17.8 COMPUTER ANALYSIS
PSpice
Nodal Analysis The first application of PSpice will be to determine
the nodal voltages for the network of Example 17.16 and compare solutions.
The network will appear as shown in Fig. 17.55 using elements
COMPUTER ANALYSIS ⏐⏐⏐ 775
2
3 �
6 �
1 3 �
6 � 3