Design of 16-bit carry look-ahead adder

A computer is comprised of some logic parts which have serial logic functions,and the adder is one of the combine logic circuits. In order to improve the traditional adder circuit,based on the carry look-ahead technology, a new design of carry look-ahead chain is presented so that the low speed of serial adders and the less carry capacity of the pure carry look-ahead adder can be overcome. Thus the optimum compute speed can be achieved in the real circuit. Based on the presented idea, the excellent random bit adder can be deduced.