触发器

A Flip-Flop or latch is a circuit that has two stable states and can be used to store state information. It is a bi-stable multivibrator. They are able to maintain the value of a single binary bit, either 1 or 0. They can hold the same electrical value for an extended amount of time. This means that that there are two stable states, which the circuit can output, and those states depend on the current output and input of the device.