The new architecture of radix-4 Chinese abacus adder

In this paper, we present a new architecture of Chinese abacus adder. As high radix of adder may reduce the number of carry propagation, the proposed Chinese abacus adder may achieve high-speed operation. The simulation results of our work are compared with CLA (Carry Look-ahead) adder. The delay of the 8-bit abacus adders are 22%, 17%, and 14% less than those of CLA adders for 0.35µm, 0.25µm, and 0.18µm technologies, respectively. The power consumption of the abacus adders are 30%, 34%, and 60% less than those of CLA adders for 0.35µm, 0.25µm, and 0.18µm technologies, respectively. The use of Chinese abacus approach results a competitive technique with respect to conventional fast adder.