TACO: timing analysis with coupling

  • Authors:
  • Ravishankar Arunachalam;Karthik Rajagopal;Lawrence T. Pileggi

  • Affiliations:
  • Department of Electrical and Computer Engineering, Carnegie Mellon University, Pittsburgh, PA;Microprocessor Products Group, Intel Corporation, Santa Clara, CA;Department of Electrical and Computer Engineering, Carnegie Mellon University, Pittsburgh, PA

  • Venue:
  • Proceedings of the 37th Annual Design Automation Conference
  • Year:
  • 2000

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Abstract

The impact of coupling capacitance on delay is usually estimated by scaling the coupling capacitances (often by a factor of 2) and modeling them as grounded. This simple approach has been shown to be overly pessimistic in some cases, while somewhat optimistic in others. This paper introduces TACO, a timing analysis methodology that produces tight bounds on worst- and best-case timing for circuits with dominant coupling capacitance. The methodology utilizes a coupled Ceff gate model for capturing the provably worst- and best-case delays as a function of the timing-window inputs to the gates.