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逻辑电路：RS触发器电路
RS触发器的“R”和“S”分别是“Reset”（复位）和“Set”（设置）的缩写。
要使触发器具有记忆功能，需要将输出状态反馈给输入端，从而保持输出状态。
当R和S都是“0”时，如果Q是“1”，则保留“1”，如果Q是“0”，则保留“0”。
Q存储“1”的状态称为设置状态，存储“0”的状态称为复位状态。
输出端有Q和Q，但是Q和Q之间的关系始终相反。
在真值表的运行条件中有禁止条件，但如果在该条件下使用，则无法确定下一个输出。
右下图是RS触发器电路的时序图。设置输入信号“1”设置为S时，输出端Q被设置。
此后，如果S和R都继续为“0”，则Q保持设置状态。
接下来，如果R变为“1”，则被复位，复位状态保留，直到输入信号再次被设置为S。
这样，RS触发器电路就具有将瞬时信号存储为数据的特性。
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