0195136047.pdf

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