TY - GEN
T1 - A standard cell optimization method for near-threshold voltage operations
AU - Kondo, Masahiro
AU - Nishizawa, Shinichi
AU - Ishihara, Tohru
AU - Onodera, Hidetoshi
PY - 2013
Y1 - 2013
N2 - Near-threshold voltage operation is a well-known solution for drastically improving the energy efficiency of microprocessors fabricated with the latest process technologies. However, it is not well studied how the optimal gate size of standard cells changes when the supply voltage of the microprocessors gets closer to the threshold voltage. This paper first shows an experimental observation that the optimal gate size for nearthreshold voltage which is 0.6V in this work is far from the optimal gate size for the nominal supply voltage which is 1.2V in our target process technology. Based on this fact, the paper next presents our cell optimization flow which finds the optimal gate sizes of individual standard cells operating at the near-threshold voltage. The experimental results show that, when operating at the 0.6V condition, the energy consumptions of several benchmark circuits synthesized with our standard cells optimized for the 0.6V condition can be reduced by 31% at the best case and by 23% on average compared with those of the same circuits synthesized with the cells optimized for the nominal supply voltage.
AB - Near-threshold voltage operation is a well-known solution for drastically improving the energy efficiency of microprocessors fabricated with the latest process technologies. However, it is not well studied how the optimal gate size of standard cells changes when the supply voltage of the microprocessors gets closer to the threshold voltage. This paper first shows an experimental observation that the optimal gate size for nearthreshold voltage which is 0.6V in this work is far from the optimal gate size for the nominal supply voltage which is 1.2V in our target process technology. Based on this fact, the paper next presents our cell optimization flow which finds the optimal gate sizes of individual standard cells operating at the near-threshold voltage. The experimental results show that, when operating at the 0.6V condition, the energy consumptions of several benchmark circuits synthesized with our standard cells optimized for the 0.6V condition can be reduced by 31% at the best case and by 23% on average compared with those of the same circuits synthesized with the cells optimized for the nominal supply voltage.
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U2 - 10.1007/978-3-642-36157-9_4
DO - 10.1007/978-3-642-36157-9_4
M3 - Conference contribution
AN - SCOPUS:84893418277
SN - 9783642361562
T3 - Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
SP - 32
EP - 41
BT - Integrated Circuit and System Design
T2 - 22nd International Workshop on Power and Timing Modeling, Optimization and Simulation, PATMOS 2012
Y2 - 4 September 2012 through 6 September 2012
ER -