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Dual-Level Adaptive Supply Voltage System for Variation Resilience

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3 Author(s)
Kyu-Nam Shim ; Dept. of Electr. & Comput. Eng., Texas A&M Univ., College Station, TX, USA ; Jiang Hu ; Silva-Martinez, J.

VLSI circuits of the 45-nm technology and beyond are increasingly affected by process variations as well as aging effects. Overcoming the variations inevitably requires additional power expense, which in turn aggravates the power and heat problem. Adaptive supply voltage (ASV) is an arguably power-efficient approach for variation resilience since it attempts to allocate power resources only to where the negative effect of variations is strong. We propose a dual-level ASV (dual-ASV) system for designs containing many timing critical paths. This system can simultaneously provide ASV at both coarse-grained and fine-grained levels, and has limited power routing overhead. The dual-ASV system is compared with conventional ASV through SPICE simulations on benchmark circuits. The results indicate that the dual-ASV system consumes significantly less power and achieves similar performance in the presence of variations.

Published in:

Very Large Scale Integration (VLSI) Systems, IEEE Transactions on  (Volume:21 ,  Issue: 6 )

Date of Publication:

June 2013

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