Consider the following circuit: The inputs A and B are both 5-bit 2\'s Complemen

Question

Consider the following circuit:

The inputs A and B are both 5-bit 2's Complement numbers. The carry-out from each adder/subtracter is ignored (so it's not shown in the diagram). For this question, given A, B, and S, give the output Z?

Note that the table below is NOT a truth table since not all combinations of A, B, and S inputs are given (only certain choices of inputs A, B, and S are asked).

A B S Z   11010     00011     000     01110     11001     010     10100     01100     101     10001     00011     011     01111     00100     111   Consider the following circuit: The inputs A and B are both 5-bit 2's Complement numbers. The carry-out from each adder/subtracter is ignored (so it's not shown in the diagram). For this question, given A, B, and S, give the output Z? Note that the table below is NOT a truth table since not all combinations of A, B, and S inputs are given (only certain choices of inputs A, B, and S are asked).

Explanation / Answer

1) 11101 (Sum)

2)   01000 ( AND Operation)

3) 10011 (NOT Operation on 'B')

4) 10011 (OR Operation)

5) 00000

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