半导体稳流管是能在宽广的电压变化范围内保持恒定电流的半导体器件。它分为具有固定稳定电流的两端器件2DH(我厂暂定型号)和稳定电流连续可调的三端器件3DH两种,其伏-安特性如图1所示。从起始电压V_S到击穿电压V_B间,2DH保持恒定电流I_(I),它的恒流特性用动态电阻r_d表示。在3DH的G与C两端外接电位器,调节电位器便可得到连续可调的稳定电流。 Semiconductor steady flow is a semiconductor device that maintains a constant current over a wide range of voltage variations. It is divided into fixed-current two-terminal device 2DH (I tentative model) and stable current continuously adjustable three-terminal device 3DH two, its volt-ampere characteristics shown in Figure 1. From the starting voltage V_S to the breakdown voltage V_B, 2DH maintains a constant current I_ (I) and its constant current characteristic is expressed by the dynamic resistance r_d. In the 3DH G and C both ends of the external potentiometer, potentiometer can be adjusted continuously adjustable stable current.