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Definition of "flip flop" |
A memory device capable of storing a logic level. / A flip flop or latch is a circuit that has two stable states and can be used to store state information. A flip-flop is a bistable multivibrator. The circuit can be made to change state by signals applied to one or more control inputs and will have one or two outputs. It is the basic storage element in sequential logic. Flip-flops and latches are a fundamental building block of digital electronics systems used in computers, communications, and many other types of systems.Flip-flops and latches are used as data storage elements. Such data storage can be used for storage of state, and such a circuit is described as sequential logic. When used in a finite-state machine, the output and next state depend not only on its current input, but also on its current state (and hence, previous inputs). It can also be used for counting of pulses, and for synchronizing variably-timed input signals to some reference timing signal. / a bistable multivibrator. A circuit which has two output states and is switched from one to the other by means of an external signal (trigger). |
Definition of "Flip-Flop" |
A device having two stable states and two input terminals (or types of input signals), each of which corresponds with one of the two states. The circuit remains in either state until caused to change to the other state by application of a voltage pulse. A device that may assume either one of two reversible, stable states. A similar bistable device with an input that allows it to act as a single-stage binary counter. The four basic types of Flip Flops include a D Flip Flop, a T flip flop, an RS flip flop and a JK Flip Flop. Examples ICs include a 7474 [graphic to right] or a 74174 D Flip Flop. Also refer to Multivibrator. / a basic digital device capable of storing one bit of information (1 or 0). In an “edge-triggered” flip/flop, information is stored in the device at the transition (positive or negative) of a clock-signal. A flip/flop is typically constructed using two “latches” in series. The first one (the “master”) opens and closes by one clock-phase, and the second (the “slave”) opens and closes using another (non-overlapping) phase. A flip/flop may be implemented using a static or dynamic logic style. In the latter case, the size is only half of the static version, but the information is lost (due to leakage) after some time, needing “refresh” (or storing new data) for proper operation. |
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