Current source modeling in the presence of body bias

Saket Gupta, Sachin S Sapatnekar

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

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.

Original languageEnglish (US)
Title of host publication2010 15th Asia and South Pacific Design Automation Conference, ASP-DAC 2010
Pages199-204
Number of pages6
DOIs
StatePublished - Apr 28 2010
Event2010 15th Asia and South Pacific Design Automation Conference, ASP-DAC 2010 - Taipei, Taiwan, Province of China
Duration: Jan 18 2010Jan 21 2010

Publication series

NameProceedings of the Asia and South Pacific Design Automation Conference, ASP-DAC

Other

Other2010 15th Asia and South Pacific Design Automation Conference, ASP-DAC 2010
CountryTaiwan, Province of China
CityTaipei
Period1/18/101/21/10

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