A novel high-speed low-power binary signed-digit adder

Addition is one of the most important arithmetic operations in digital computation. Optimization of adders' speed, power, and area is a challenging task. To this end, redundant number system has been proposed in the literatures. In this paper, we propose a new redundant binary signed-digit adder that not only utilizes specific encoding for the input operands, but also uses a new efficient adder structure. Using this technique we can generate low power signed digit adders that perform fast additions. The comparisons show delay, power and area reduction both on FPGA and Synopsys Design Vision tool.