The diagram below shows a
2013
The diagram below shows a
- A.
Half adder
- B.
Half subtractor
- C.
Full adder
- D.
Full subtractor
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Show answer & explanation
Correct answer: B
Half subtractor is a combinational logic circuit intended to perform the subtraction of two single bits and generate the output. A subtractor circuit with two input variables A and B displays two outputs i.e. D = A − B and B₀ (Borrow). The logical expression for half-subtractor: Difference (D) = Ā·B + A·B̅ = A ⊕ B
Borrow (B₀) = Ā·B