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IEICE TRANSACTIONS on Information

Easily Testable Realization Based on Single-Rail-Input OR-AND-EXOR Expressions

Takashi HIRAYAMA, Goro KODA, Yasuaki NISHITANI, Kensuke SHIMIZU

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Summary :

It is known that AND-EXOR two-level networks obtained by AND-EXOR expressions with positive literals are easily testable. They are based on the single-rail-input logic, and require (n+4) tests to detect their single stuck-at faults, where n is the number of the input variables. We present three-level networks obtained from single-rail-input OR-AND-EXOR expressions and propose a more easily testable realization than the AND-EXOR networks. The realization is an OR-AND-EXOR network which limits the fan-in of the AND and OR gates to n/r and r respectively, where r is a constant (1 r n). We show that only (r+n/r) tests are required to detect the single stuck-at faults by adding r extra variables to the network.

Publication
IEICE TRANSACTIONS on Information Vol.E82-D No.9 pp.1278-1286
Publication Date
1999/09/25
Publicized
Online ISSN
DOI
Type of Manuscript
PAPER
Category
Fault Tolerant Computing

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