Flip-flop (electronics)

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In electronics, a flip-flop is a circuit that has two stable states and can be used to store state information.

A flip-flop is usually controlled by control signals that can include a clock signal. The outputs usually include the complement as well as the normal output.

Today the word latch is mainly used for simple transparent storage elements, while slightly more advanced non-transparent (or clocked) devices are described as flip-flops. Informally, as this distinction is quite new, the two words are sometimes used interchangeably.[1]

A circuit incorporating latches or flip-flops has state; its output depends not only on its current input, but also on its previous inputs. Such a circuit is described as sequential logic.

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