Variability-aware design of energy-delay optimal linear pipelines operating in the near-threshold regime and above

Qing Xie, Yanzhi Wang, Massoud Pedram

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Soft-edge flip-flop based pipelines can improve the performance and energy efficiency of circuits operating in the super-threshold (supply voltage) regime by allowing opportunistic time borrowing. The application of this technique to near-threshold regime of operation, however, faces a significant challenge due to large circuit parameter variations that result from manufacturing process imperfections and substrate temperature changes. This paper thus addresses the issue of variability-aware design of the energy-delay optimal linear pipelines that are aimed at operating in both the near-threshold and super-threshold regimes. Precisely, this goal is achieved by deriving the optimal delay line configuration in the soft-edge flip-flops in the near-threshold and the super-threshold operations regimes. The key is to ensure that the same transistor sizes result in effective operation of the delay lines (and hence appropriate settings of the transparency window size) in both operation regimes under the process induced variations. Experimental results demonstrate the efficacy of the proposed solution.

Original languageEnglish (US)
Title of host publicationGLSVLSI 2013 - Proceedings of the ACM International Conference of the Great Lakes Symposium on VLSI
Pages61-66
Number of pages6
DOIs
StatePublished - May 30 2013
Event23rd ACM International Conference of the Great Lakes Symposium on VLSI, GLSVLSI 2013 - Paris, France
Duration: May 2 2013May 3 2013

Publication series

NameProceedings of the ACM Great Lakes Symposium on VLSI, GLSVLSI

Conference

Conference23rd ACM International Conference of the Great Lakes Symposium on VLSI, GLSVLSI 2013
CountryFrance
CityParis
Period5/2/135/3/13

Keywords

  • energy-delay optimal pipeline design
  • near-threshold
  • parameter variability
  • soft edge flip-flop
  • time borrowing
  • ultra-low voltage

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Xie, Q., Wang, Y., & Pedram, M. (2013). Variability-aware design of energy-delay optimal linear pipelines operating in the near-threshold regime and above. In GLSVLSI 2013 - Proceedings of the ACM International Conference of the Great Lakes Symposium on VLSI (pp. 61-66). (Proceedings of the ACM Great Lakes Symposium on VLSI, GLSVLSI). https://doi.org/10.1145/2483028.2483061