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The full subtractor can be implemented using ___________(a) Two XOR and an OR gates(b) Two half subtractors and an OR gate(c) Two multiplexers and an AND gate(d) Two comparators and an AND gateI have been asked this question during a job interview.This is a very interesting question from Half & Full Subtractor in chapter Arithmetic Circuits of Digital Circuits |
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Answer» RIGHT choice is (b) Two half subtractors and an OR gate To elaborate: A full subtractor has 3 input BITS and two outputs bits BORROW and DIFFERENCE. The full subtractor can be implemented USING two half subtractors and an OR gate. |
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