
Quiz
12. The figure below represents a full subtractor circuit. A & B are the inputs and Bi is the
borrow input, while S is the output and Co is the borrow output. Complete the truth
table for the outputs of this full adder circuit.
13. Design a 4-input multiplexer circuit.
A B Bi S Bo
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
A
B
Bi
Bo
S
33
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