载流子的传输过程小结: 123457 将 NPN BJT接成共射极型:以射极为输入和输出回路的公共端 即:VB>>V,发射结正偏→易于E区多子扩散 返回 vg>0,集中结反偏→易于B区少子漂移 b Rb E B b12 E i=i+ C P E +lEp E B e‖i E CBO i+ 2 iclcBo +icnI iB=ibl +iEP-IcBOE EC B EB EC RC b Rb c e ● ● ● ● 载流子的传输过程小结： 将NPN BJT接成共射极型：以射极为输入和输出回路的公共端 即： VBE>>VT , 发射结正偏→ 易于E区多子扩散 VCB＞0 ， 集中结反偏→ 易于B区少子漂移 b c e iE iB iC iEP ib1 i cn1 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ien iC iE iB ien= icn1 + ib1 iE = ien + iEP ≈ ien ICBO= icn2 + icp iE iE iC iC iB iB iC= ICBO + icn1 ; iB= ib1 + iEP -ICBO icn2 icp 1 2 3 4 5 7 返回