From function equations of different kinds of flip-flop integrated circuits, we discussed the methods of function change from final product JK of D flip-flop to other kind in use.

Taking the latch composed of two inverters as basic storage unit, this paper proposes a novel CMOS JK flip-flop based on the design at switch level.

Taking JK flip-flop as an example, a minimization technique of J and K excitation functions based on behaviors of flip-flop was proposed.