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Journal of Electrical and Computer Engineering
Volume 2012 (2012), Article ID 561580, 12 pages
http://dx.doi.org/10.1155/2012/561580
Research Article

An Optimization Mechanism Intended for Static Power Reduction Using Dual- 𝑉 t h Technique

Informatics Center, Federal University of Pernambuco, Aveinda Jornalista Aníbal Fernandes, Cidade Universitária, 50670-901 Recife, PE, Brazil

Received 16 July 2011; Accepted 14 September 2011

Academic Editor: Dhireesha Kudithipudi

Copyright © 2012 Rodolfo P. Santos et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Power consumption reduction is a challenge nowadays. Techniques for dynamic and static power minimization have been proposed, but most of them are very time consuming. This work proposes an algorithm for reducing static power, which can be perfectly inserted in the conventional design flow for integrated systems considering an open source environment (open access infrastructure). The proposed approach, based on a Dual-Threshold technique, replaces part of the cells of the circuit by cells with a higher threshold voltage without resulting in timing violations in the circuit. The decision to replace a cell is based on timing estimates of the circuit modeling with the cell replacement, before it is actually replaced. The fact that only some cells are replaced every iteration results in a reduction of the runtime of the algorithm. Additionally, results showed a reduction in static power up to 39.28%, when applying the proposed approach in the ISCAS85 benchmark circuits.