施密特触发器在模拟电路和数字电路中,可用来减少对噪声和干扰的灵敏度。电流型施密特触发器在光电检测器、条码阅读器和光学远距控制器中特别有用。图1中所示的这种无电阻器的电流型施密特触发器使用了6只晶体管。这种电路使用了一个倒相器的输出,并通过改变门限电流来获得反馈信号。本电路使用了一个倒相器对(Q_(N2),Q_(p4),一个电流镜像对 Schmitt Trigger In analog circuits and digital circuits, can be used to reduce the sensitivity to noise and interference. Current-mode Schmitt triggers are particularly useful in photodetectors, bar code readers and optical remote controllers. The resistorless current-mode Schmitt trigger shown in Figure 1 uses six transistors. This circuit uses the output of an inverter and obtains the feedback signal by changing the threshold current. This circuit uses an inverter pair (Q_ (N2), Q_ (p4), a current mirror pair