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A latch or flip-flop is a circuit that has two stable states and can be used to store state information. However latch is normally used to describe a simple storage device while flip-flop is normally reserved for clocked devices.

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How to eliminate the forbidden state in an SR latch?

I'd like a latch where the output only changes when both inputs have changed. If only one input has changed, the latch output should stay constant. … This property would have allowed the above latch to debounce the switch. …
Richard Hansen's user avatar