Utilization of Path-Clustering in Efficient Stress-Control Gate Replacement for NBTI Mitigation

Shumpei MORITA, Song BIAN, Michihiro SHINTANI, Masayuki HIROMOTO, Takashi SATO
2017 IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences  
Replacement of highly stressed logic gates with internal node control (INC) logics is known to be an effective way to alleviate timing degradation due to NBTI. We propose a path clustering approach to accelerate finding effective replacement gates. Upon the observation that there exist paths that always become timing critical after aging, critical path candidates are clustered to select representative path in each cluster. With efficient data structure to further reduce timing calculation, INC
more » ... ogic optimization has first became tractable in practical time. Through the experiments using a processor, 171x speedup has been demonstrated while retaining almost the same level of mitigation gain.
doi:10.1587/transfun.e100.a.1464 fatcat:emycnt63jbg4nbiyu3vkxuaapa