Common-Emitter Amplifier Stage ** Circuit Description ** * power supplies Vcc 1 0 DC +10V Vee 8 0 DC -10V * input signal Vs 6 0 AC 10mV Rs 5 6 10k * amplifier C1 4 5 1GF Rb 4 0 100k Q1 2 4 3 Q2N2222A Rc 1 2 10k Re 3 8 10k C2 2 7 1GF C3 3 0 1GF * load + ammeter Rl 7 9 10k Vout 9 0 0 * transistor model statement for the 2N2222A .model Q2N2222A NPN (Is=14.34f Xti=3 Eg=1.11 Vaf=74.03 Bf=255.9 Ne=1.307 + Ise=14.34f Ikf=.2847 Xtb=1.5 Br=6.092 Nc=2 Isc=0 Ikr=0 Rc=1 + Cjc=7.306p Mjc=.3416 Vjc=.75 Fc=.5 Cje=22.01p Mje=.377 Vje=.75 + Tr=46.91n Tf=411.1p Itf=.6 Vtf=1.7 Xtf=3 Rb=10) ** Analysis Requests ** * calculate DC bias point information .OP .AC LIN 1 1kHz 1kHz ** Output Requests ** * voltage gain Av=Vo/Vs .PRINT AC mag(V(6)) ph(V(6)) mag(V(7)) ph(V(7)) * current gain Ai=Io/Ii .PRINT AC mag(I(Vs)) ph(I(Vs)) mag(I(Vout)) ph(I(Vout)) * input resistance Ri=Vi/Ii .PRINT AC mag(V(4)) ph(V(4)) mag(I(Vs)) ph(I(Vs)) .end