微变等效电路动态 分压式偏置电路的计犷 b i。Uh=IB/e(1+/)/BRl βI UO=-BIBR'L R el BR'L rbe+(1+ )REl 71=RB∥{7he(1+/)RE} R 将R折算 到基极 1414 微变等效电路 b e E1 L (1 )R R A r u   + +  = − 将RE1折算 到基极 ri = R B //{rb e + (1+ )RE1} ro = RC 动态 分压式偏置电路的计算 U o = − I BR L Ui = I Brbe + (1+ )I BRE1 rbe RC RL • Ui Ii • I b • I c • Uo • I b •  R B RE1