By including which logical gate, binary adder circuit is used for both binary…
2021
By including which logical gate, binary adder circuit is used for both binary addition and subtraction?
- A.
Ex-AND gate
- B.
AND gate
- C.
Ex-OR gate
- D.
OR gate
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Correct answer: C
To perform both binary addition and subtraction, a binary adder circuit uses an Ex-OR gate in combination with a control signal. The Ex-OR gate is used to generate the sum bit in addition. For subtraction, the control signal inverts the second operand using the Ex-OR gate, effectively converting the subtraction into addition of the two's complement. This allows the same circuit to perform both operations.