• University of California, Irvine

• EECS 70B

EECS70B Final

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(Please print this exam and enter your answers in the tables provided. If you cannot print,

draw the tables with corresponding question number and enter your answers. Show

complete work.)

Problem 1 (15 points): For the two-port network of Figure 1, determine the following

parameters. Do not forget the units.

a. The parameter z12.

b. The parameter y21.

c. The parameter h12.

d. The parameter g12.

e. The parameter B.

f. The parameter C.

Figure 1

a b c d e f

Problem 2 (10 points): For the circuit of Figure 2, the z parameters of the two-port

network are given, Determine the following.

a. Remove RL. At the resulting open port 2, determine the Thevinin equivalent

circuit.

b. Reconnect RL and remove VS and RS At the resulting open port 1, determine the

Thevinin equivalent circuit.

Figure 2

Part a

Vth

Rth

Part b

Vth

Rth

Problem 3 (25 pts): The circuit of Figure 3 was in steady-state before t = 0. Determine:

Figure 3

a iL(0-)

b vc(0-)

c iL(0+)

d vc(0+)

e vL(0+)

f ic(0+)

g iL’(0+)

h vc’(0+)

i iL(ꝏ)

j vc(ꝏ)

k s1 and s2, (roots of

the characteristic

equation.)

l A1 and A2