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Formal verification of combinational circuits

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4 Author(s)
Jain, J. ; Fujitsu Labs. of America, Santa Clara, CA, USA ; Narayan, A. ; Fujita, M. ; Sangiovanni-Vincentelli, A.

With the increase in the complexity of present day systems, proving the correctness of a design has become a major concern. Simulation based methodologies are generally inadequate to validate the correctness of a design with a reasonable confidence. More and more designers are moving towards formal methods to guarantee the correctness of their designs. In this paper we survey some state-of-the-art techniques used to perform automatic verification of combinational circuits. We classify the current approaches for combinational verification into two categories functional and structural. The functional methods consist of representing a circuit as a canonical decision diagram. Two circuits are equivalent if and only if their decision diagrams are equal. The structural methods consist of identifying related nodes in the circuit and using them to simplify the problem of verification. We briefly describe some of the methods in both the categories and discuss their merits and drawbacks

Published in:

VLSI Design, 1997. Proceedings., Tenth International Conference on

Date of Conference:

4-7 Jan 1997