This constant voltage system key lies in the control system the design, and switchtransistor choice and application.
该稳压系统的关键在于控制系统的设计，及开关晶体管的选择及应用。
2
In this switching power supply, the novel mode of serial two-transistor is adopted to solve the difficulty of choosing switchtransistor under the condition of high-voltage input.
该开关电源采用新颖的双管串联模式，解决了高电压输入条件下开关管的选用难题。
3
The resistor and the capacitor together were the timer, and the transistor worked as the switch.