Transistor and Pin Reordering for Gate Oxide Leakage Reduction in Dual T{ox} Circuits

  • Authors:
  • Anup Kumar Sultania;Dennis Sylvester;Sachin S. Sapatnekar

  • Affiliations:
  • University of Minnesota, Minneapolis, MN;University of Michigan, Ann Arbor, MI;University of Minnesota, Minneapolis, MN

  • Venue:
  • ICCD '04 Proceedings of the IEEE International Conference on Computer Design
  • Year:
  • 2004

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Abstract

Gate oxide tunneling current (I{gate}) is emerging as a key roadblock for device scaling in nanometer-scale CMOS circuits. A practical means to reduce I{gate} is to leverage dual T{ox} processes where non-critical transistors are assigned a thicker T{ox}. In this paper, we generate a leakage/delay tradeoff curve for dual T{ox} circuits, and propose a transistor and pin reordering technique that has a minimal layout impact to further reduce the total leakage current up to 18% and I{gate} up to 26% without incurring any delay penalty.