Fault diagnosis in reversible circuits under missing-gate fault model

  • Authors:
  • Hafizur Rahaman;Dipak K. Kole;Debesh K. Das;Bhargab B. Bhattacharya

  • Affiliations:
  • Information Technology Department, Bengal Engineering and Science University, Shibpur, Howrah 711103, India;Information Technology Department, Bengal Engineering and Science University, Shibpur, Howrah 711103, India;Department of Computer Science and Engineering, Jadavpur University, Jadavpur, India;ACM Unit, Indian Statistical Institute, Kolkata, India

  • Venue:
  • Computers and Electrical Engineering
  • Year:
  • 2011

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Abstract

This article presents a novel technique for fault detection as well as fault location in a reversible combinational circuit under the missing gate fault model. It is shown that in an (nxn) reversible circuit implemented with k-CNOT gates, addition of only one extra control line along with duplication each k-CNOT gate, yields an easily testable design, which admits a universal test set (UTS) of size (n+1) that detects all single missing-gate faults (SMGFs), repeated-gate faults (RGFs), and partial missing-gate faults (PMGFs) in the circuit. Furthermore, storage of only one vector (seed) of the UTS is required; the rest can be generated by n successive cyclic bit-shifts from the seed. For fault location under the SMGF model, a technique for identifying the faulty gate is also presented that needs application of a single test vector, provided the circuit is augmented with some additional observable outputs.