Design and Implementation of Modified Carry Select Adder

The essential component for logical and arithmetic operations, a carry-choose adder is well-known for speeding up the arithmetic operations. To improve computational speed and efficiency, the current Carry Select Adder (CSLA) combines high-speed adder logics, including the Kogge Stone Adder and Carry Look-Ahead Adder. Better speed and lower energy consumption are achieved by the hybrid CSLA by using optimize the carry propagation network, the Brunt-Kung Adder is a kind of parallel prefix adder that outperforms the Kogge-Stone Adder. It is intended to offer a balance between area efficiency and speed. Although it has often fewer steps than the Kogge-Stone Adder, it nevertheless performs well. In a 64-bit Kogge Stone Adder, 1362 cells are present. Total power(nW) is 4642061.765. In Brunt Kung Adder, 1312 cells are present, and the total power is 4598331.278 (nW). In a Brunt Kung Adder, the total power is less compared to a Kogge Stone Adder. In Brunt Kung Adder, the percentage comparison of total power is 0.942%. The power delay product of the Brunt-Kung Adder is 19.8% less compared to the Kogge Stone Adder.