Sleep transistor sizing method using accurate delay estimation considering input vector pattern and non-linear current model

Seidai Takeda, Kyundong Kim, Hiroshi Nakamura, Kimiyoshi Usami

研究成果: Article査読

1 被引用数 (Scopus)

抄録

Beyond deep sub-micron era, Power Gating (PG) is one of the most effective techniques to reduce leakage power of circuits. The most important issue of PG circuit design is how to decide the width of sleep transistor. Smaller total sleep transistor width provides smaller leakage power in standby mode, however, insufficient sleep transistor insertion suffers from significant performance degradation. In this paper, we present an accurate and fast gate-level delay estimation method for PG circuits and a novel sleep transistor sizing method utilizing our delay estimation for module-based PG circuits. This method achieves high accuracy within acceptable computation time utilizing accurate discharge current estimation based on delayed logic simulations with limited input vector patterns and by realizing precise current characteristics for logic gates and sleep transistors. Experimental results show that our delay estimation successfully achieves high accuracy and avoids overestimation and underestimation seen in conventional method. Also, our sleep transistor sizing method on average successfully reduces the width of sleep transistors by 40% when compared to conventional methods within an acceptable computation time.

本文言語English
ページ(範囲)2499-2509
ページ数11
ジャーナルIEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
E94-A
12
DOI
出版ステータスPublished - 2011 12

ASJC Scopus subject areas

  • 信号処理
  • コンピュータ グラフィックスおよびコンピュータ支援設計
  • 電子工学および電気工学
  • 応用数学

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