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2.5 COMPUTER-AIDED CIRCUIT ANALYSIS: SPICE 87

N 1

GNAME N1 N2 NC+ NC− GMVALUE

+


N 2

NC+

NC−

Gmvx vx

N+

ENAME N+ N− NC+ NC− AVVALUE
(a) (b)


+
+



N−

NC+

NC−

Avvx vx

N 1

FNAME N1 N2 VSENSE AIVALUE
VSENSE NC1 NC2 O

N 2

N+

HNAME N+ N− VSENSE RMVALUE
VSENSE N1 N2 O
(c) (d)


+


N−

NC 1

NC 2

Rmix
ix

vsense Aiix

+

NC 1

NC 2

ix
vsense

+

Figure 2.5.2Four types of controlled sources and their corresponding PSpice statements.(a)Voltage-
controlled voltage source.(b)Voltage-controlled current source.(c)Current-controlled voltage source.
(d)Current-controlled current source.


EXAMPLE 2.5.1


Develop and execute a PSpice program to solve for the currentI 2 in Figure E2.5.1(a).


Solution

Figure E2.5.1(b) is drawn showing the node numbers, and adding a voltage source of zero value
in series withR 1 , because there is a current-controlled source. The program is as follows:


EXAMPLE E2.5.1(a) A Title Identifying the Program.
* THE CIRCUIT DIAGRAM IS GIVEN IN FIGURE E2.5.1(b); a comment
statement
* CIRCUIT DESCRIPTION WITH COMPONENT STATEMENTS
IS013
R1145
R21210
R3202
R4305
HCCVS 2 3 VSENSE 2
VSENSE430
* ANALYSIS REQUEST


  • DCIS331



  • OUTPUT REQUEST



  • PRINT DC I(R2) V(1) V(2) V(3)

  • END ; an end statement

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