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clear//
//Variables
VCC = 12.0 //Source voltage (in volts)
RE = 100.0 //Emitter Resistance (in ohm)
RC = 3.3 //Collector Resistance (in kilo-ohm)
IE = 2.0 //Emitter current (in milli-Ampere)
VBE = 0.7 //Emitter-to-Base Voltage (in volts)
alpha = 0.98 //Common base current gain
R2 = 20.0 //Resistance (in kilo-ohm)
//Calculation
IC = alpha * IE //Collector current (in milli-Ampere)
VB = VBE + IE * RE * 10**-3 //Base voltage (in volts)
VC = VCC - IC * RC //Collector voltage (in volts)
IR2 = VC / (R2) //Current through resistance 2 (in milli-Ampere)
IB = IE - IC //Base current (in milli-Ampere)
IR1 = IR2 + IB //Current through resistance 1 (in milli-Ampere)
R1 = (VC - VB) / IR1 //Value of the resistance (in kilo-ohm)
//Result
printf("\n The value of R1 is %0.1f kilo-ohm.",R1)
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