Issue No.02 - February (1974 vol.23)
H. Fujiwara , Department of Electronic Engineering, Osaka University
This paper is concerned with the problem of designing easily testable sequential machines, output-observable machines, for which there exist very short checking experiments. A sequential machine for which any initial state can be uniquely determined only by the output response is said to be output-observable. An algorithm is developed to modify a given machine to an output-observable one by adding a minimum number of extra outputs. This method is based on the fact that the output-observable realization of a given machine M exists if and only if M is semi-FSR realizable (a special type of feedback shift register realization).
Checking experiments, diagnosable sequential machines, fault detection, output-observable machines, semi-feedback shift register (FSR) realizability.
H. Fujiwara, "Design of Diagnosable Sequential Machines Utilizing Extra Outputs", IEEE Transactions on Computers, vol.23, no. 2, pp. 138-145, February 1974, doi:10.1109/T-C.1974.223876