JK Flip Flop The JK Flip Flop is the most widely used flip flop. It is considered to be a universal flipflop circuit. The sequential operation of the JK Flip Flop is same as for the RS flipflop with the same SET and RESET input. The difference is that the JK Flip Flop does not the invalid input states of the RS Latch (when S and R are both 1).The JK Flip Flop name has been kept on the ...