Eliminating wire crossings for molecular quantum-dot cellular automata implementation

  • Authors:
  • A. Chaudhary;D. Z. Chen;K. Whitton;M. Niemier;R. Ravichandran

  • Affiliations:
  • Dept. of Comp. Sci. & Eng., Notre Dame Univ., IN, USA;Dept. of Comp. Sci. & Eng., Notre Dame Univ., IN, USA;Dept. of Comp. Sci. & Eng., Notre Dame Univ., IN, USA;California Univ., La Jolla, CA, USA;-

  • Venue:
  • ICCAD '05 Proceedings of the 2005 IEEE/ACM International conference on Computer-aided design
  • Year:
  • 2005

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Abstract

When exploring computing elements made from technologies other than CMOS, it is imperative to investigate the effects of physical implementation constraints. This paper focuses on molecular quantum-dot cellular automata circuits. For these circuits, it is very difficult for chemists to fabricate wire crossings (at least in the near future). A novel technique is introduced to remove wire crossings in a given circuit to facilitate the self assembly of real circuits - thus providing meaningful and functional design targets for both physical and computer scientists. The technique eliminates all wire crossings with minimal logic gate/node duplications. Experimental results based on existing QCA circuits and other benchmarks are quite encouraging, and suggest that further investigation is needed.