Digital Logic Circuits 28 POSITIVE EDG D-Flip Flop D S1 Q1 SR1 C1 R1 Q1' C SR2 inactive SR1 active JK-Flip Flop J S1 Q1 SR1 C1 K R1 Q1' C T-Flip Flop: JK-Flip Flop whose J and K in T input. Toggles whenever there is Computer Organization