(2)将Rc改为68k2,重复计算 V。(+12V) 1不变,仍为0.023mA RC 10k Q CC 12 ≈0.029m4) .60×6.8 C 100kg ∵l<IB∴三极管处在放大状态 B×lB=60×0023≈1.4mA) CE CcC RC=12-1.4×68≈248(V(1-6) (2)将RC改为6.8kW,重复计算 IB不变,仍为0.023mA 0.029( ) 60 6.8 12 mA C CC B S = = R V I ∵IB<IBS ∴三极管处在放大状态。 60 0.023 1.4(mA) I C = I B = - 12-1.4 6.8 2.48(V) VO =VCE =VCC I C RC = + + +V - - 1 T 2 3 100kΩ R CC R V b I ( +12V) V C O 10kΩ