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clear//
//Variables
VCC = 10.0 //Source voltage (in volts)
RB = 470.0 * 10**3 //Base resistance (in ohm)
RE = 1.0 * 10**3 //Emitter resistance (in ohm)
RL = 1.0 * 10**3 //Load resistance (in ohm)
a = 4.0 //Turn's ratio
beta1=50.0;beta2=50.0;
VBE = 0.7 //Emitter-to-base voltage (in volts)
//Calculation
IE = VCC/ (RE + RB/beta1) //Emitter current (in Ampere)
r1e = 25.0 / IE * 10**-3 //a.c. emitter diode resistance (in ohm)
Ri1 = RB*beta1*r1e/(RB+beta1*r1e) //Input resistance of first stage (in ohm)
Ri2 = RB*beta2*r1e/(RB+beta2*r1e) //Input resistance of Second stage (in ohm)
R1i2 = a**2 * Ri2 //Input resistance of the second stage transformed to primary side (in ohm)
Ro1 = R1i2 //Output resistance of second stage (in ohm)
R1o2 = a**2 * RL //Output resistance of the second stage transformed to the primary side (in ohm)
Av1 = Ro1/r1e //Voltage gain of first stage
Av2 = R1o2/r1e //Voltage gain of second stage
Av = Av1 * Av2 //Overall voltage gain
Gv = 20 * log10(Av) //Overall voltage gain (in decibels)
//Result
printf("\n Voltage gain of first stage is %0.1f .\nVoltage gain of second stage is %0.1f .\nOverall voltage gain is %0.0f .\nOverall voltage gain in decibels is %0.0f dB.",Av1,Av2,Av,Gv)
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