锁存器(Latch)是一种对脉冲电平敏感的存储单元电路，它们可以在特定输入脉冲电平作用下改变状态。锁存，就是把信号暂存以维持某种电平状态。-Latches (Latch) is a pulse level sensitive storage unit circuit, they can be in specific input pulse level under the role of change state. Lock to save, the signal is temporary in order to maintain a level.