本文所说的特殊晶体管,是指场效应管、单结晶体管和可控硅。这类晶体管在使用与维修中,怎样正确识别它们的各个电极呢?一、场效应管它属于电压控制型的半导体器件,具有输入电阻高、噪声小、功耗低等优点。结型场效应管的符号如图1,a是N型沟道,b是P型沟道。场效应管的栅极相当于晶体三极管的基极,源极和漏极分别相当于发射极和集电极。用万用表R×1k档测量 The special transistor that this text refers to refers to the field effect tube, single junction transistor and thyristor. This type of transistor in use and maintenance, how to correctly identify each of their electrodes? First, it belongs to the field-effect transistor voltage-controlled semiconductor devices, with high input resistance, low noise, low power consumption and other advantages. Junction FET symbol shown in Figure 1, a is the N-type channel, b is the P-type channel. The gate of the FET corresponds to the base of the transistor, and the source and drain correspond to the emitter and the collector, respectively. Use a multimeter R × 1k file measurement