Electronics Engineering · Digital Electronics
What happens to the final carry-out bit when subtracting a smaller number from a larger number (yielding a positive result) using 2's complement representation with an n-bit adder?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1A carry-out of 1 is generated and it is ignored or discarded.✓
- 2The carry-out bit is inverted to find the correct sign bit.
- 3The carry-out bit must be added back to the least significant bit of the result.
- 4The carry-out bit indicates an arithmetic overflow condition.
Correct answer
A carry-out of 1 is generated and it is ignored or discarded.
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