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clear//
//Variables
VCC = 12.0 //Source voltage (in volts)
R1 = 100.0 * 10**3 //Resistance (in ohm)
R2 = 20.0 * 10**3 //Resistance (in ohm)
R3 = 10.0 * 10**3 //Resistance (in ohm)
R4 = 2.0 * 10**3 //Resistance (in ohm)
R5 = 10.0 * 10**3 //Resistance (in ohm)
R6 = 2.0 * 10**3 //Resistance (in ohm)
beta1=100.0;beta2=100.0;
//Calculation
Vth = VCC * R2 / (R1 + R2) //Thevenin's voltage (in volts)
IE1 = Vth / R4 //Emitter curren1 (in Ampere)
r1e = 25.0 / IE1 * 10**-3 //a.c. emitter diode resistance (in ohm)
VR6 = VCC - IE1 * R3 //Voltage across resistance6 (in volts)
IE2 = VR6 / R6 //Emitter current2 (in Ampere)
r1e2 = 25.0 / IE2 * 10**-3 //a.c. emitter diode resistance2 (in ohm)
Ri2 = beta2*(r1e2 + R6) //Input resistance of second stage (in ohm)
Ro1 = R3 * Ri2 /(R3 + Ri2) //Output resistance of first stage (in ohm)
Ro2 = R5 //Output resistance of second stage (in ohm)
Av1 = Ro1/(r1e + R4) //Voltage gain of first stage
Av2 = Ro2/(r1e2 + R6) //Voltage gain of second stage
Av = Av1 * Av2 //Overall voltage gain
//Result
printf("\n Voltage gain of first stage is %0.1f .\nVoltage gain of second stage is %0.1f .\nOverall voltage gain is %0.2f .",Av1,Av2,Av)
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