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Low-power operation using self-timed circuits and adaptive scaling of the supply voltage

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4 Author(s)
Nielsen, L.S. ; Dept. of Comput. Sci., Tech. Univ. Denmark, Lyngby, Denmark ; Niessen, C. ; Sparso, J. ; van Berkel, K.

Recent research has demonstrated that for certain types of applications like sampled audio systems, self-timed circuits can achieve very low power consumption, because unused circuit parts automatically turn into a stand-by mode. Additional savings may be obtained by combining the self-timed circuits with a mechanism that adaptively adjusts the supply voltage to the smallest possible, while maintaining the performance requirements. This paper describes such a mechanism, analyzes the possible power savings, and presents a demonstrator chip that has been fabricated and tested. The idea of voltage scaling has been used previously in synchronous circuits, and the contributions of the present paper are: 1) the combination of supply scaling and self-timed circuitry which has some unique advantages, and 2) the thorough analysis of the power savings that are possible using this technique.<>

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Very Large Scale Integration (VLSI) Systems, IEEE Transactions on  (Volume:2 ,  Issue: 4 )