Low power finite state machine synthesis using power-gating

  • Authors:
  • Sambhu Nath Pradhan;M. Tilak Kumar;Santanu Chattopadhyay

  • Affiliations:
  • Department of ECE, NIT Agartala, 799055 Tripura, India;Department of E and ECE, IIT Kharagpur 721302, West Bengal, India;Department of E and ECE, IIT Kharagpur 721302, West Bengal, India

  • Venue:
  • Integration, the VLSI Journal
  • Year:
  • 2011

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Abstract

Power-gating turns off the power supply of a portion of the circuit completely, resulting in total elimination of power consumption for that part. However, it also necessitates that the sub-circuit to be activated should be charged for some time before its activation. This critical issue can influence the decomposition of a finite state machine (FSM) for its power gated implementation. In this paper we have presented a power-gating method that integrates FSM partitioning with state encoding, thus providing a total solution to the problem of power-aware FSM synthesis. It shows better results, in terms of dynamic and leakage power consumption, compared to the existing techniques reported in the literature.