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直流电流放大系数H_(FB)是晶体三极管的重要参数.本电路是为快速、准确地测量H??而设计的. 根据共发射极电路H_(FE)的定义: H_(FE)=I_C/I_B|V_(??)-常数为使测量的数据接近实用状态,针对不同用途的三极管规定了相应的测试条件.例如:V_(CE)=6伏、I_C=1毫安;或V_(CB)=1.5伏、I_C=250毫安等等. 在V_(CB)和I_C为设定值的情况下,测出I_B即可求出H_(??Bo)也可直接在I_B表头上标出H_(FB)读数.本电路是用恒流源供给I_C,再通过电路自动调节I_B来恒定V_(CB)的.
DC current amplification factor H_ (FB) is an important parameter of the transistor.This circuit is designed for fast and accurate measurement of H ~ According to the definition of the common emitter circuit H_ (FE): H_ (FE) = I_C / I_B | V _ (??) - Constant For the purpose of bringing the measured data closer to practicality, the corresponding test conditions are specified for different applications such as V CE = 6 V, I_C = 1 mA or V CB ) = 1.5V, I_C = 250mA, etc. When V_ (CB) and I_C are set values, H_ (Bo) can be obtained by measuring I_B and can also be directly marked on I_B header Out of H_ (FB) reading.This circuit is the constant current source supply I_C, and then automatically adjust the circuit I_B to constant V_ (CB).