The time delay in a look-ahead carry adder is independent of
| The time delay in a look-ahead carry adder is independent of
A. Number of operands only
B. Propagation delay only
C. Number of bits in the operand only
D. Bits in the operand, number of operands and propagation delay
Please scroll down to see the correct answer and solution guide.
Right Answer is: C
SOLUTION
The 4-bit carry look-ahead carry adder is shown in the figure given below.
Carry look-ahead adder has just two levels of gate delay from any input to any output. So, the time delay is independent of the number of bits in the operand. But it depends on the number of operands, propagation delay.
