Separatrices in High-Dimensional State Space: System-Theoretical Tangent Computation and Application to SRAM Dynamic Stability Analysis Conference Paper uri icon


  • Shrinking access cycle times and the employment of dynamic read/write assist circuits have made the use of standard static noise margins increasingly problematic for scaled SRAM designs. Recently proposed dynamic noise margins precisely characterize dynamic stability using the conceptof stability boundaries, or separatrices, and provide elegant separatrix tracing algorithm. However, the present separatrix characterization method is only efficient in the twodimensional state space and hence not practically applicable to fully extracted SRAM designs with additional parasitics. We present a rigorous system-theoretical approach for computing the tangent approximation to the separatrix in the high-dimensional space. Using this as a basis, we develop fast method based on tangent approximation and exact iterative-refinement method for analyzing SRAM dynamic stability. The proposed algorithms have been implemented as a SPICE-like CAD tool and are broadly applicable to efficient computation of dynamic noise margins. Copyright 2010 ACM.

name of conference

  • Proceedings of the 47th Design Automation Conference on - DAC '10

published proceedings


author list (cited authors)

  • Zhang, Y., Li, P., & Huang, G. M.

citation count

  • 17

complete list of authors

  • Zhang, Yong||Li, Peng||Huang, Garng M

publication date

  • January 1, 2010 11:11 AM