Question 14305 – Operating-Systems
December 28, 2023OOPS
December 28, 2023Question 8919 – ISRO CS 2020
In a 8-bit ripple carry adder using identical full adders, each full adder takes 34ns for computing sum. If the time taken for 8-bit addition is 90ns, find the time taken by each full adDer to find carry.
Correct Answer: D
Question 48 Explanation:
Consider n-bit Ripple Carry Adder.
Total Delay = Delay_Sum + (n-1) Delay_Carry
Here, n=8.
90ns = 34 ns + 7 * Delay_Carry
56ns = 7 * Delay_Carry
Delay_Carry= 8ns
Total Delay = Delay_Sum + (n-1) Delay_Carry
Here, n=8.
90ns = 34 ns + 7 * Delay_Carry
56ns = 7 * Delay_Carry
Delay_Carry= 8ns
6 ns
7 ns
10 ns
8 ns
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