A Discrete Event System Approach to Online Testing of Speed Independent Circuits

Table 1

A partial list of faults and their effects on STG.

Fault type	Effect of fault on the transitions
Transistor stuck-on fault for C1	+ can only be fired after +, −, and − (the same as normal condition)
Transistor stuck-on fault for C1	+ can be fired after either − or −
Transistor stuck-on fault for C1	− can be fired after either + or +
Transistor stuck-on fault for C1	− can only be fired after + and +
Transistor stuck-on fault for C2	+ can be fired after +
Transistor stuck-on fault for C2	+ can be fired after +
Transistor stuck-on fault for C2	− can be fired after −
Transistor stuck-on fault for C2	− can be fired after −
Transistor stuck-off fault for C1	All arcs from + are always 0
Transistor stuck-off fault for C1	All arcs from + are always 0
Transistor stuck-off fault for C1	All arcs from − are always 0
Transistor stuck-off fault for C1	All arcs from − are always 0
Transistor stuck-off fault for C2	All arcs from + are always 0
Transistor stuck-off fault for C2	All arcs from + are always 0
Transistor stuck-off fault for C2	All arcs from − are always 0
Transistor stuck-off fault for C2	All arcs from − are always 0
Transistor stuck-on fault for C1; Transistor stuck-off fault for C1	All arcs from + are always 0
Transistor stuck-on fault for C1; Transistor stuck-off fault for C1	All arcs from − are always 0
Transistor stuck-on fault for C2; Transistor stuck-off fault for C2	All arcs from − are always 0
Transistor stuck-on fault for C2; Transistor stuck-off fault for C2	All arcs from + are always 0
Stuck-at-0 fault at Line 1 or Line 2 or Line 3; Stuck-at-0 fault at Line 6 or Line 7; Stuck-at-1 fault at Line 9 or Line 10	All arcs from + are always 0
Stuck-at-0 fault at Line 4 and Line 5	All arcs from + are always 0
Stuck-at-1 fault at Line 4 or Line 5; Stuck-at-1 fault at Line 6 or Line 7; Stuck-at-0 fault at Line 9 or Line 10	All arcs from − are always 0
Stuck-at-0 fault at Line 8	All arcs from + are always 0 and all arcs from + are always 0
Stuck-at-1 fault at Line 8	All arcs from − are always 0 and all arcs from − are always 0
Stuck-at-0 at Line 11	All arcs from − are always 0 and all arcs from + are always 0
Stuck-at-1 fault at Line 11	All arcs from + are always 0 and all arcs from − are always 0
Stuck-at-0 fault at Line 12 or Line 13	All arcs from + are always 0
Stuck-at-1 fault at Line 12 or Line 13	All arcs from − are always 0