Question:
In a 4-bit ripple carry adder, the worst-case delay occurs when _______.
In a 4-bit ripple carry adder, the worst-case delay occurs when _______.
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In a ripple carry adder, the speed is limited by the propagation of carries, so minimizing carry propagation is key to improving speed.
Updated On: Jun 16, 2025
- All input bits are 0
- A carry propagates through all full adders
- No carry is generated
- The sum exceeds 15
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The Correct Option is B
Solution and Explanation
In a ripple carry adder, the carry bit must propagate through each full adder in sequence. The worst-case delay happens when the carry bit propagates through all full adders, as it takes the longest time for the carry to be computed.
Therefore, the correct answer is option (2).
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