VIDEO TUTORIALS: The Master-Slave JK Flipflop
by Isai Damier

The output Q of the Master-Slave JK Flipflop can only be changed when the clock signal transitions from 1 to 0. When J is equal to 1 and K is equal to 0, the output Q will equal to 1 when the clock changes from 1 to 0. When J is equal to 1 and K is equal to 1, the output Q toggles between 1 and 0 when the clock changes from 1 to 0.