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- W1997742530 abstract "In this paper, we present an approach for applying two supply voltages to optimize power in CMOS digital circuits under the timing constraints. Given a technology-mapped network, we first analyze the power/delay model and the timing slack distribution in the network. Then a new strategy is developed for timing-constrained optimization issues by making full use of stacks. Based on this strategy, the power reduction is translated into the polynomial-time-solvable maximal-weighted-independent-set problem on transitive graphs. Since different supply voltages used in the circuit lead to totally different power consumption, we propose a fast heuristic approach to predict the dual-supply voltages by looking at the lower bound of power consumption in the given circuit. To deal with the possible power penalty due to the level converters at the interface of different supply voltages, we use a constrained F-M algorithm to minimize the number of level converters. We have implemented our approach under an SIS environment. Experiment shows that the resulting lower bound of power is tight for most circuits and that the predicted optimum supply voltages are exactly or very close to the best choice of actual ones. The total power saving of up to 26% (average of about 20%) is achieved without degrading the circuit performance, compared to the average power improvement of about 7% by the gate sizing technique based on a standard cell library. Our technique provides the power-delay tradeoff by specifying different timing constraints in circuits for power optimization." @default.
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- W1997742530 date "2001-10-01" @default.
- W1997742530 modified "2023-09-23" @default.
- W1997742530 title "On gate level power optimization using dual-supply voltages" @default.
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- W1997742530 doi "https://doi.org/10.1109/92.953496" @default.
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