VC>VB>VE, Vb-e=0.6V~0.7V

   전압증폭도

                           Vt        26mV
                    re = --- = --------- = 35.6Ω
                            Io      0.73mA 
 

                                RC               4700
                    Av = ---------- = ------------- = 2.1
                             RE + re         2200 + 35.6