ECE 2030 B 1:00pm
Computer Engineering
Fall 2006
4 problems, 4 pages
Exam One Solution
20 September 2006
1
Problem 1 (3 parts, 30 points)
Incomplete Circuits
For each partial switch circuit below, complete the complementary switching network so the
circuit contains no floats or short. Also write the Boolean expression computed by the completed
circuit. Assume the inputs and their complements are available.
Out
x
A
C
B
D
E
A
B
D
C
E
Out
y
A
B
E
C
D
C
A
B
D
E
Out
z
A
C
B
D
A
C
B
D
OUTx =
E
C
D
B
A
⋅
+
⋅
⋅
OUTy =
C
E
D
B
A
⋅
+
⋅
+
)
(
OUTz =
)
(
)
(
D
B
C
A
+
⋅
+

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