Temporal performance degradation under NBTI: estimation and design for improved reliability of nanoscale circuits

  • Authors:
  • Bipul C. Paul;Kunhyuk Kang;Haldun Kufluoglu;Muhammad Ashraful Alam;Kaushik Roy

  • Affiliations:
  • Toshiba America Research Inc., San Jose, CA;Purdue University, West Lafayette, IN;Purdue University, West Lafayette, IN;Purdue University, West Lafayette, IN;Purdue University, West Lafayette, IN

  • Venue:
  • Proceedings of the conference on Design, automation and test in Europe: Proceedings
  • Year:
  • 2006

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Abstract

Negative Bias Temperature Instability (NBTI) has become one of the major causes for temporal reliability degradation of nanoscale circuits. In this paper, we analyze the temporal delay degradation of logic circuits due to NBTI. We show that knowing the threshold voltage degradation of a single transistor due to NBTI, one can predict the performance degradation of a circuit with a reasonable degree of accuracy. We also propose a sizing algorithm taking NBTI-affected performance degradation into account to ensure the reliability of nanoscale circuits for a given period of time. Experimental results on several benchmark circuits show that with an average of 8.7% increase in area one can ensure reliable performance of circuits for 10 years.