Keywords :
Asynchronous machine, controlled excitation, edge sensitive flip-flop, multiple-input changes, self-synchronization, sequential circuit.; Automata; Automatic control; Clocks; Combinational circuits; Detectors; Flip-flops; Hazards; Sequential circuits; Sufficient conditions; Synchronous machines; Asynchronous machine, controlled excitation, edge sensitive flip-flop, multiple-input changes, self-synchronization, sequential circuit.;