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<p><b>Abstract</b>—A novel parallel-prefix architecture for high speed modulo 2<super><it>n</it></super>-1 adders is presented. The proposed architecture is based on the idea of recirculating the generate and propagate signals, instead of the traditional end-around carry approach. Static CMOS implementations verify that the proposed architecture compares favorably with the already known parallel-prefix or carry look-ahead structures.</p>
Modulo $2^n-1$ adders, parallel-prefix adders, carry look-ahead adders, VLSI design.

J. Kalamatianos, H. T. Vergos, D. Nikolos, C. Efstathiou and L. Kalampoukas, "High-Speed Parallel-Prefix Modulo 2n - 1 Adders," in IEEE Transactions on Computers, vol. 49, no. , pp. 673-680, 2000.
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