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GATE | GATE-CS-2015 (Set 2) | Question 65
A half adder is implemented with XOR and AND gates. A full adder is implemented with two half adders and one OR gate. The propagation delay of an XOR gate is twice that of an AND/OR gate. The propagation delay of an AND/OR gate is 1.2 microseconds. A 4-bit ripple-carry binary adder is implemented by using full adders. The total propagation time of this 4-bit binary adder in microseconds is
(A)
19.2 microseconds
(B)
16.4 microseconds
(C)
21.9 microseconds
(D)
17.6 microseconds
Answer
Please comment below if you find anything wrong in the above post
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