Compare and contrast ripple-carry adder and carry-look

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Q. Compare and contrast Ripple-Carry Adder and Carry-Look ahead Adder

In a 4-bit ripple-carry adder as shown in Figure , assume that each full-adder is implemented using the design as shown in Figure (a) and each single logic gate (e.g., AND, OR, XOR, etc.) has a propagation delay of 10 ns.

What is the earliest time this 4-bit ripple-carry adder can be sure of having a valid summation output? Explain how you reached your answer and how you did your calculations.

Reference no: EM132114983

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