SUMMARYIn this paper, the new residue number system (RNS) moduli sets {2 2n , 2 n −1, 2 n+1 −1} and {2 2n , 2 n −1, 2 n−1 −1} are introduced. These moduli sets have 4n-bit dynamic range and well-formed moduli which can result in high-performance residue to binary converters as well as efficient RNS arithmetic unit. Next, efficient residue to binary converters for the proposed moduli sets based on mixed-radix conversion (MRC) algorithm are presented. The converters are ROM-free and they are realized using carry-save adders and modulo adders. Comparison with the other residue to binary converters for 4n-bit dynamic range moduli sets shown that the presented designs based on new moduli sets {2 2n , 2 n − 1, 2 n+1 − 1} and {2 2n , 2 n − 1, 2 n−1 − 1} are improved the conversion delay and result in hardware savings. Also, the proposed moduli sets can lead to efficient binary to residue converters, and they can speed-up internal RNS arithmetic processing, compared with the other 4n-bit dynamic range moduli sets. key words: residue to binary converter, mixed-radix conversion (MRC), residue number system (RNS), computer arithmetic