3.2共射极放大电路 (2)v2=V1 sino电容的阻抗:设Cb1=10uF,f1kHz ≈160 2Cb12×10°×10×10 ic UBE CE B B Re VCE Rb 0 0 UBE= VCbI+ Ui VBE+ vi 2=0 CE ic. R CbI BE,VCb2一VCE CC -LC C HOME Vo=UCEVCb2=UCE VCE BACKvBE o t vCE = VCC -iC  RC vBE = VCb1 + vi = VBE + vi vo = vCE－VCb2 = vCE－ VCE 3.2 共射极放大电路 vi=0 VCb1 = VBE , VCb2 = VCE vBE o t （2）vi =V1 sint 电容的阻抗：设Cb1=10uF，f=1kHz。      = = = − 16 2 10 10 10 1 2 1 1 3 6 b1 b1 Cb 1 jC fC  Z