An approach to self-diagnosis of a newly developed fault in digital systems

An approach to self-diagnosis of a newly developed fault in digital systems is developed via the expanding domain principle. A restricted number of stable multiple faults in components and development of one more fault during diagnosis are admissible. Self-diagnosis is initiated twice and the results generated in these starts are compared for detecting the developed fault and obtaining reliable diagnosis. An example is given to illustrate the self-diagnosis process in a 9-module system.