A Novel Ripple/Carry Look a Head Hybrid Carry Select Adder Architecture
In this paper, two general architectures of Carry Select Adder (CSA) have been introduced for high speed addition. These CSA architectures utilize the hybridized structure of Carry Look-ahead Adder (CLA) and Ripple Carry Adder (RCA). In these architectures the critical path delay has been reduced by reducing the number of multiplexer stages. The proposed designs are compared with regular CSA based on RCA. The second architecture showed 11.3%, 3.9% improvement in delay and an overhead of 13% in area.