施密特(Schmitt)触发器通常只在事先定义好的静态设定点上进行切换。例如,为了提供用户定义的设定点,我们可以在图1所示的标准滞后电路中使用一个比较器。但是,图2所示电路设计却允许建立动态设定点,这对于可变噪声的应用场合是有利的。本电路有利于抑制幅度变动的噪声。图2所示电路所需元件数不多,而且也都是使用一些 Schmitt triggers usually only switch between pre-defined static setpoints. For example, to provide a user-defined set point, we can use a comparator in the standard hysteresis circuit shown in Figure 1. However, the circuit design shown in Figure 2 allows dynamic set points to be established, which is advantageous for variable noise applications. The circuit is conducive to suppress the noise amplitude changes. The circuit shown in Figure 2 requires a small number of components, but also some are used