ASIC Implementation of Modified Faster Carry Save Adder

Digital adders are the core block of DSP processors. The final Carry Propagation Adder (CPA) structure of many adders constitutes high carry propagation delay and this delay reduces the overall performance of the DSP processor. This paper proposes a simple and efficient approach to reduce the maximum delay of carry propagation in the final stage. Based on this approach a 16, 32 and 64-bit adder architecture has been developed and compared with conventional fast adder architectures. This paper identifies the performance of proposed designs in terms of delay-area-power through custom design and layout in 0.18um CMOS process technology. The result analysis shows that the proposed architectures have better performance in reduction of carry propagation delay than contemporary architectures.