In this paper the design of modulo 2/sup n/-1 adders is discussed. Two new design procedures are given, based on the one-level and the two-level carry look-ahead addition algorithms. The adders designed according to the procedures proposed in this paper are significantly more efficient, with respect to speed and the cost function area-time product, than the corresponding adders already known from open literature.>
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Efstathiou et al. (1994) studied this question.
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