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clear//
//Variables
VCC = 10.0 //Source voltage (in volts)
R1 = 800.0 //Resistance (in ohm)
R2 = 200.0 //Resistance (in ohm)
R3 = 600.0 //Resistance (in ohm)
R4 = 200.0 //Resistance (in ohm)
R5 = 100.0 //Resistance (in ohm)
R6 = 1000.0 //Resistance (in ohm)
beta1=100.0;beta2=100.0;
VBE = 0.7 //Emitter-to-base voltage (in volts)
//Calculation
VR2 = VCC * (R2 / (R1 + R2)) //Voltage across resistance2 (in volts)
IE1 = (VR2 - VBE)/R2 //Emitter current of Q1 transistor (in Ampere)
IC1 = IE1 //Collector current of Q1 transistor (in Ampere)
VC1 = VCC - IC1 * R3 //Voltage at the collector of Q1 transistor (in volts)
VE1 = IE1 * R4 //Voltage at the emitter of Q1 transistor (in volts)
VCE1 = VC1 - VE1 //Collector-to-emitter voltage of Q1 transistor (in volts)
VE2 = VC1 - (-VBE) //Voltage at the emitter of Q2 transistor (in volts)
IE2 = (VCC - VE2)/R6 //Emitter current of Q2 transistor (in Ampere)
IC2 = IE2 //Collector-current of Q2 transistor (in Ampere)
VC2 = IC2 * R5 //Voltage at the collector of Q2 transistor (in volts)
VCE2 = VC2 - VE2 //Collector-to-emitter voltage of Q2 transistor (in volts)
r1e1 = 25.0 / IE1 * 10**-3 //a.c. emitter diode resistance of Q1 transistor (in ohm)
r1e2 = 25.0 / IE2 * 10**-3 //a.c. emitter diode resistance of Q2 transistor (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)
Av1 = Ro1 / (r1e1 + R4) //Voltage gain of first stage
Av2 = 1.0 //Voltage gain of second stage
Av = Av1 * Av2 //Overall voltage gain
//Result
printf("\n Emitter current of Q1 transistor is %0.3f mA.\nCollector current of Q1 transistor is %0.3f mA.\nEmitter current of Q2 transistor is %0.3f mA.\nCollecotr-current of Q2 transistor is %0.3f mA.",IE1*10**3,IC1*10**3,IE2*10**3,IC2*10**3)
printf("\n Collector-to-emitter voltage of Q1 transistor is %0.3f v.\nCollector-to-emitter voltage of Q2 transistor is %0.3f .",VCE1,VCE2)
printf("\n Overall voltage gain is %0.2f .",Av)
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