Flip-flop and semiconductor system including the same

A flip-flop which is connected to a power supply and a ground and generates a second data signal by receiving a first data signal and a clock signal from outside of the flip-flop, the flip-flop comprising:

• a first stage circuit that generates a first internal signal through a first node using the first data signal and the clock signal;
• a second stage circuit that generates a second internal signal through a second node;
• and
• a third stage circuit that generates the second data signal by latching the second internal signal using the second internal signal and the clock signal,
• wherein the first stage circuit receives a first feedback signal that is generated using the first internal signal and prevents the first node from floating by grounding the first node or connecting the first node to the power supply, based on the first feedback signal.

A flip-flop, the flip-flop comprising:

• a first stage circuit that receives a first data signal and a clock signal and that generates a first internal signal through a first node;
• a second stage circuit that receives the first internal signal and the clock signal, and that generates a second internal signal through a second node;
• and
• a third stage circuit that generates a second data signal by latching the second internal signal using the second internal signal and the clock signal,
• wherein at least one of the first stage circuit and the second stage circuit receives a feedback signal from an output of one of the first stage circuit and the second stage circuit, and
• when the second stage circuit receives the feedback signal from the second stage circuit and the second data signal is generated when the clock signal is at a first level, the second stage circuit cuts off at least one first current path between the second node and a power supply, based on the feedback signal from the second stage circuit, when the clock signal is at a second level, and
• when the first stage circuit receives the feedback signal from the first stage circuit, the first stage circuit grounds the first node or connects the first node to the power supply, based on the feedback signal from the first stage circuit, to prevent the first node from floating.