Efficient sign detection using parallel prefix adder

A new architecture for detecting sign bit in digital signal processing applications using the residue number system (RNS) is detailed. The utilization of residue number system (RNS) to digital signal processing lies in the capacity to work on signed numbers. Two troublesome calculations are identifying sign and compare the magnitude in RNS system. The design is based on using a restricted moduli set with moduli of the form 2n, 2n-1 and 2n+1. This new architecture use kogge stone adder instead of using carry save adder which is used in existing models. This kogge stone adder enhances speed and reduce delay and memory utilization. This unit comprises of one n-bit kogge stone adder and 2n-bit parallel prefix carry generation unit.