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我们经常需要知道,通信用电源的输出电压何时掉到它的额定值之下。一般来说,掉电意味着故障,因而要求更换电源,或进行系统的某种维修。图1所示电路使用了一个隔离的比较电路来监测两个(具有不同极
We often need to know when the output voltage of a communication power supply falls below its rating. In general, a power failure means a malfunction, requiring a replacement power supply or some kind of system maintenance. The circuit shown in Figure 1 uses an isolated comparator circuit to monitor two (with different poles