MTTF-Aware Design Methodology of Adaptively Voltage Scaled Circuit with Timing Error Predictive Flip-Flop

Yutaka MASUDA  Masanori HASHIMOTO  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E102-A   No.7   pp.867-877
Publication Date: 2019/07/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E102.A.867
Type of Manuscript: Special Section PAPER (Special Section on Design Methodologies for System on a Chip)
adaptive voltage scaling,  activation-aware slack assignment,  mean time to failure,  timing error predictive FF,  

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Adaptive voltage scaling is a promising approach to overcome manufacturing variability, dynamic environmental fluctuation, and aging. This paper focuses on error prediction based adaptive voltage scaling (EP-AVS) and proposes a mean time to failure (MTTF) aware design methodology for EP-AVS circuits. Main contributions of this work include (1) optimization of both voltage-scaled circuit and voltage control logic, and (2) quantitative evaluation of power saving for practically long MTTF. Experimental results show that the proposed EP-AVS design methodology achieves 38.0% power saving while satisfying given target MTTF.