a y=F X, Q a x be the input variable set of the new flip-flop ay be the input variable set of the original flip-flop Q be the present-state of the original flip-flop X, Q Converting Original circuit flip-flop Q converted flip-flop◼ Yi=Fi (X,Q)  X be the input variable set of the new flip-flop  Y be the input variable set of the original flip-flop  Q be the present-state of the original flip-flop Original flip-flop Converting circuit Q’ Q converted flip-flop X, Q Y