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latch

An electronic circuit that maintains one of two states. See flip-flop.



flip-flop

An electronic circuit that maintains its 0 or 1 state and is used in static memories and hardware registers. By the mid-20th century, the flip-flop was a breakthrough in circuit logic, which allowed data to be stored. The first flip-flops, known as "trigger circuits," were constructed with two transistors. Subsequent designs use two NOR or NAND logic gates.



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