开关电源(转换开关)能为许多电子设备提供功率。如果不是线性电源的话,就有一个瞬时功率的测量问题。当转换开关接通或关断时,就会对元件产生瞬时应力,这种瞬时应力有时会超过元件的设计规范。通过对加到元件上的瞬时功率的测量,就可以设计出保证所用的元件能耐瞬时应力的转换开关。在转换开关输入端的简单电路中,MOSFET功率晶体管由40kHz钟 Switching power supplies (transfer switches) power many electronic devices. If it is not a linear power supply, there is an instantaneous power measurement problem. When the diverter switch is turned on or off, there is instantaneous stress on the part, which sometimes exceeds the design specifications of the part. By measuring the instantaneous power applied to the component, it is possible to design a changeover switch that ensures that the components used are resistant to instantaneous stress. In the simple circuit at the input of the switch, the MOSFET power transistor consists of 40 kHz clocks