00:01
Hello students to determine the maximum total time for the addition of two 8 -bit numbers 8 -bit numbers using 8 -bit parallel ripple carry adder.
00:11
We need to consider the critical path.
00:14
So this path critical path.
00:20
So this is the path that experience the maximum delay.
00:23
So here the critical path will be the longest propagation delay right the path with the longest product propagation delay.
00:32
So for 8 -bit parallel ripple carry adder the critical path occurs when the carry ripple propagates from the least significant bit to most significant bit.
00:44
So the carry ripple passes through all the full orders and the delay accumulates you can just sum the delay.
00:51
So here the critical paths consist of eight full orders.
00:55
So we need to consider the delays of different signals like a to c and c out c out.
01:04
So that will be equal to 20 nanoseconds here.
01:08
A b to c and c out is equal to 20 nanoseconds...