TY - GEN
T1 - Current source modeling in the presence of body bias
AU - Gupta, Saket
AU - Sapatnekar, Sachin S
PY - 2010/4/28
Y1 - 2010/4/28
N2 - With the increasing use of adaptive body biases in high-performance designs, it has become necessary to build timing models that can include these effects. State-of-the-art timing tools use current source models (CSMs), which have proven to be fast and accurate. However, a straightforward extension of CSMs to incorporate multiple body biases results in unreasonably large characterization tables for each cell. We propose a new approach to compactly capture body bias effects within a mainstream CSM framework. Our approach features a table reduction method for compact storage, and a fast and novel waveform sensitivity method for timing evaluation. On a 45nm technology, we demonstrate high accuracy, with worst-case errors of under 5% in both slew and delay as compared to HSPICE. We show a speedup of over five orders of magnitude over HSPICE and almost 70x over conventional CSMs.
AB - With the increasing use of adaptive body biases in high-performance designs, it has become necessary to build timing models that can include these effects. State-of-the-art timing tools use current source models (CSMs), which have proven to be fast and accurate. However, a straightforward extension of CSMs to incorporate multiple body biases results in unreasonably large characterization tables for each cell. We propose a new approach to compactly capture body bias effects within a mainstream CSM framework. Our approach features a table reduction method for compact storage, and a fast and novel waveform sensitivity method for timing evaluation. On a 45nm technology, we demonstrate high accuracy, with worst-case errors of under 5% in both slew and delay as compared to HSPICE. We show a speedup of over five orders of magnitude over HSPICE and almost 70x over conventional CSMs.
UR - http://www.scopus.com/inward/record.url?scp=77951217017&partnerID=8YFLogxK
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U2 - 10.1109/ASPDAC.2010.5419896
DO - 10.1109/ASPDAC.2010.5419896
M3 - Conference contribution
AN - SCOPUS:77951217017
SN - 9781424457656
T3 - Proceedings of the Asia and South Pacific Design Automation Conference, ASP-DAC
SP - 199
EP - 204
BT - 2010 15th Asia and South Pacific Design Automation Conference, ASP-DAC 2010
T2 - 2010 15th Asia and South Pacific Design Automation Conference, ASP-DAC 2010
Y2 - 18 January 2010 through 21 January 2010
ER -