1. 1 Analysis and Simulation Exercises ~ DC Circuit Analysis (2) Voltage-Controlled Voltage Source (VCVS) Voltage-Controlled Current Source (VCCS) Current-Controlled Voltage Source (CCVS) Current-Controlled Current Source (CCCS)

2. 2 Voltage-Controlled Voltage Source (VCVS) 2V a

3. 3

4. 4 Input File Voltage-Controlled Voltage Source V 1 0 10V E 3 0 2 0 2 R1 1 2 250 R2 2 0 100K R3 3 4 40K RL 4 0 1K.OP.TF V(4) V.END

5. 5 Output File NODE VOLTAGE NODE VOLTAGE ( 1) 10.0000 ( 2) 9.9751 ( 3) 19.9500 ( 4).4866 **** SMALL-SIGNAL CHARACTERISTICS V(4)/V = 4.866E-02 INPUT RESISTANCE AT V = 1.003E+05 OUTPUT RESISTANCE AT V(4) = 9.756E+02

6. 6 Voltage-Controlled Current Source (VCCS)

7. 7 Input File Voltage-Controlled Current Source V 1 0 12V G 3 0 2 0 0.02 R1 1 2 300 R2 2 0 900 R3 3 0 200 R4 3 0 200.OP.OPT nopage.TF V(3) V.END

8. 8 Output File NODE VOLTAGE NODE VOLTAGE NODE VOLTAGE ( 1) 12.0000 ( 2) 9.0000 ( 3) -18.0000 **** VOLTAGE-CONTROLLED CURRENT SOURCES NAME G I-SOURCE 1.800E-01 **** SMALL-SIGNAL CHARACTERISTICS V(3)/V = -1.500E+00 INPUT RESISTANCE AT V = 1.200E+03 OUTPUT RESISTANCE AT V(3) = 1.000E+02

9. 9 Current-Controlled Voltage Source (CCVS)

10. 10 Input File Current-Controlled Voltage Source V 1 0 15V V0 2A 2 0V H 3 0 V0 -400 R1 1 2 50 R2 2 0 500 R3 2A 0 500 R4 3 4 50 R5 4 0 150.OP.OPT nopage.TF v(4) V.END

11. 11 Output File NODE VOLTAGE ( 1) 15.0000 ( 2) 12.5000 ( 3) 10.0000 ( 4) 7.5000 ( 2A) 12.5000 VOLTAGE SOURCE CURRENTS NAME CURRENT V -5.000E-02 V0 -2.500E-02 **** CURRENT-CONTROLLED VOLTAGE SOURCES NAME H V-SOURCE 1.000E+01 I-SOURCE -5.000E-02 **** SMALL-SIGNAL CHARACTERISTICS V(4)/V = 5.000E-01 INPUT RESISTANCE AT V = 3.000E+02 OUTPUT RESISTANCE AT V(4) = 3.750E+01

12. 12 Current-Controlled Current Source (CCCS)

13. 13 Input File Current-Controlled Current Source V 1 0 20V F 3 0 V -3 R1 1 2 1500 R2 2 0 2500 R3 3 0 500 R4 3 0 500.OP.OPT NOPAGE.TF V(3) V.END

14. 14 Output File NODE VOLTAGE NODE VOLTAGE NODE VOLTAGE ( 1) 20.0000 ( 2) 12.5000 ( 3) -3.7500 **** CURRENT-CONTROLLED CURRENT SOURCES NAME F I-SOURCE 1.500E-02 **** SMALL-SIGNAL CHARACTERISTICS V(3)/V = -1.875E-01 INPUT RESISTANCE AT V = 4.000E+03 OUTPUT RESISTANCE AT V(3) = 2.500E+02

15. 15 Question & Answer

16. 16 Exercise For the circuit in Fig.1, find the current through the 6-  resistor and the voltage v.