Modeling and simulation of real defects using fuzzy logic

  • Authors:
  • Amir Attarha;Mehradad Nourani;Carco Lucas

  • Affiliations:
  • Dept. of EE, The Univ. of Texas at Dallas, Richardson, TX;Dept. of EE, The Univ. of Texas at Dallas, Richardson, TX;Dept. of ECE, The Univ. of Tehran, Tehran 14399, Iran

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

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Abstract

Real defects (e.g. stuck-at or bridging faults) in the VLSI circuits cause intermediate voltages and can not be modeled as ideal shorts. In this paper we first show that the traditional zero-resistance model is not sufficient. Then, we present a resistive fault model for real defects and use fuzzy logic techniques for fault simulation and test pattern generation at the gate-level. Our method produces more realistic fault coverage compared to the conventional methods. The experimental results include the fault coverage and test pattern statistics for the ISCAS85 benchmarks.