I need to know if my formula's are correct for current gain. Sorry for shakey drawing. I know beta would change the dc values slightly but for my prof. it's close enough. Beta AC = 70. DC Analysis VB = R1R2/R1+R2 VE = VB - VBE IE = VE/RE AC Analysis r'e = 25mv/IE Req = R1 || R2 Rout = RC || RL Voltage Gain Av = Rout/ r'e Vout = Av * Vin Current Gain Ai = Iout/Iin Iin= Vin/Rin(total) Rin(total) = Req || Beta AC(Rin(base)) Rin(base) = Beta AC * r'e Iout = Ic + Il Ic = Beta AC * Iin Il = Vout/ RL Bolded is what I am unsure off. I know current out is the combination of current through the collector resistor and the load resistor since AC see's DC source as a ground. So, does that mean the current in multiplied by beta is equal to the current through the collector?