On simulation-based probabilistic model checking of mixed-analog circuits

  • Authors:
  • Edmund Clarke;Alexandre Donzé;Axel Legay

  • Affiliations:
  • Carnegie Mellon University, Computer Science Department, Pittsburgh, USA;VERIMAG Laboratory, Gières, France 38610;INRIA Rennes, Computer Science Department, Rennes, France

  • Venue:
  • Formal Methods in System Design
  • Year:
  • 2010

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Abstract

In this paper, we consider verifying properties of mixed-signal circuits, i.e., circuits for which there is an interaction between analog (continuous) and digital (discrete) values. We use a simulation-based approach that consists of evaluating the property on a representative subset of behaviors and answering the question of whether the circuit satisfies the property with a probability greater than or equal to some threshold. We propose a logic adapted to the specification of properties of mixed-signal circuits in the temporal domain as well as in the frequency domain. We also demonstrate the applicability of the method on different models of Δ---Σ modulators for which previous formal verification attempts were too conservative and required excessive computation time.