Title

Syndrome-Testability Can be Achieved by Circuit Modification

Abstract

In [1] and [2] Savir developed many facets of syndrome-testing (checking the number of minterms realized by a circuit against the number realized by a fault-free version of that circuit) and presented evidence showing that syndrome-testing can be used in many practical circuits to detect all single faults. In some cases, where syndrome-testing did not detect all single stuck-at-faults, Savir showed that by the addition of a small number of additional "control" inputs and gates one would get a function which is syndrome-testable for all single stuck-at faults, and yet which realizes the original function when the "control" inputs are fed appropriate values. However, he left open the question of whether one could always modify a circuit to achieve syndrome-testability. In this correspondence we show that a combinatorial circuit can always be modified to produce a single-fault, syndrome-testable circuit.

Department(s)

Computer Science

Keywords and Phrases

Logic Circuits; Circuit Modification; Stuck-at-faults; Syndrome Testability

International Standard Serial Number (ISSN)

0018-9340

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1981 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

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