Efficient modulo 2n+1 adder architectures

  • Authors:
  • H. T. Vergos;C. Efstathiou

  • Affiliations:
  • Computer Engineering and Informatics Department, University of Patras, 26500 Patras, Greece;Informatics Department, ATEI of Athens, 12210 Egaleo, Athens, Greece

  • Venue:
  • Integration, the VLSI Journal
  • Year:
  • 2009

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Abstract

In this manuscript, we introduce novel carry lookahead (CLA) and parallel-prefix architectures for the design of modulo 2^n+1 adders with operands in the diminished-1 number representation. The proposed architectures are based on the use of Ling carries' computation units and they lead to faster and/or smaller adders than the already known ones that are based on the traditional carry signals.