Design a 4-bit binary subtractor circuit using binary addition and explain the…
2024
Design a 4-bit binary subtractor circuit using binary addition and explain the borrowing mechanism involved.
- A.
The borrowing mechanism involves adding 2 to the minuend.
- B.
The borrowing mechanism uses XOR and AND gates to adjust the subtraction.
- C.
The borrowing mechanism is not applicable in binary subtraction.
- D.
The borrowing mechanism involves complementing the subtrahend and adding 1.
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Correct answer: D
Design a 4-bit subtractor using full adders. Use two's complement: invert subtrahend bits, add 1, then add to minuend. Borrowing is handled by the carry-out logic in two's complement addition.