Sleep transistor sizing using timing criticality and temporal currents

  • Authors:
  • Anand Ramalingam;Bin Zhang;Anirudh Devgan;David Z. Pan

  • Affiliations:
  • The University of Texas, Austin, TX;The University of Texas, Austin, TX;Austin Research Laboratory, Austin, TX;The University of Texas, Austin, TX

  • Venue:
  • Proceedings of the 2005 Asia and South Pacific Design Automation Conference
  • Year:
  • 2005

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Abstract

Power gating is a circuit technique that enables high performance and low power operation. One of the challenges in power gating is sizing the sleep transistor which is used to gate the power supply. This paper presents a new methodology based on timing criticality and temporal currents to size the sleep transistor. The timing criticality information and temporal current estimation are obtained using static timing analyzer. The results obtained indicate that our proposed technique results in area reduction of sleep transistors by 80% and 49% compared to module based design and cluster based design respectively.