Application principle of field effect tubes

Field effect tubes are divided into two main categories: junction type and insulated gate type. Junction-type field effect tube (JFET) because there are two PN junction and named, insulated gate type field effect tube (JGFET) is due to the gate and other electrodes complete insulation and named. Currently in the insulated gate type field effect tube, the most common application is MOS field effect tube, referred to as MOS tube (i.e. metal-oxide-semiconductor field effect tube MOSFET); in addition there are PMOS, NMOS and VMOS power field effect tube, as well as the recently introduced πMOS field effect tube, VMOS power module, etc..