Library tuning for subthreshold operation

摘要

This paper presented a comparison among libraries tuned for subthreshold operation and one reference library tuned for super-threshold operation. In the comparison range without cell area penalty, our width tuning only library has faster delay distribution and less variation compare to the reference library. At the designed voltage of 0.3V our width-and-length tuning library has 30% better timing and 25% less variation. The width tuning only library shows better voltage scaling ability as compared to the width and length tuning library, which is optimum at designed voltage 0.3V.