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clear//
//Variables
VCC = 15.0 //Source voltage (in volts)
RC = 3.3 * 10**3 //Collector resistance (in ohm)
RE = 1.0 * 10**3 //Emitter resistance (in ohm)
RL = 10.0 * 10**3 //Load resistance (in ohm)
R1 = 33.0 * 10**3 //Resistance (in ohm)
R2 = 8.2 * 10**3 //Resistance (in ohm)
beta1=100.0;beta2=100.0;
VBE = 0.7 //Emitter-to-base voltage (in volts)
//Calculation
Vth = VCC * R2 / (R1 + R2) //Thevenin's voltage (in volts)
Rth = R1 * R2 / (R1 + R2) //Thevenin's equivalent resistance (in ohm)
IE = (Vth - VBE)/(RE + Rth/beta1) //Emitter current (in Ampere)
r1e = 25.0/IE * 10**-3 //a.c. emitter resistance (in ohm)
Ri2 = beta1 * r1e //Input resistance of second stage (in ohm)
Ro1 = RC * Ri2 / (RC + Ri2) //Output resistance of first stage (in ohm)
Ro2 = RC * RL /(RC + RL) //Output resistance of second stage (in ohm)
Av1 = Ro1 / r1e //Voltage gain of the first stage
Av2 = Ro2 / r1e //Voltage gain of second stage
Av = Av1 * Av2 //Overall voltage gain
Gv = 20 * log10(Av) //Overall voltage (in decibels)
//Result
printf("\n Voltage gain of stage one and two are as follows %0.2f and %0.2f .\nOverall voltage gain is %0.0f .\nOverall voltage gain in decibels is %0.1f dB.",Av1,Av2,Av,Gv)
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