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clc
//ex13.4
V_CC=15;
B=100; //beta value
R_B=200*10^3;
R_C=1*10^3;
//we proceed in such a way that the required values will be displayed according to the satisfied condition of the below three cases
//a)cut-off region
V_BE=15; //no voltage drop across R_B in cut-off state
V_CE=15; //no voltage drop across R_C in cut-off state
i_C=0; //no collector current flows as there is no voltage drop
i_B=0; //no base current flows as there is no voltage drop
if(V_BE<0.5) then, //cut-off condition
disp(i_C,'collector current in amperes')
disp(V_CE,'collector to emitter voltage in volts')
end
//b)saturation region
V_BE=0.7; //base to emitter voltage in saturation state
V_CE=0.2; //collector to emitter voltage in saturation state
i_C=(V_CC-V_CE)/R_C; //collector current
i_B=(V_CC-V_BE)/R_B; //base current
if((B*i_B>i_C)&(i_B>0)) then, //saturation state conditions
disp(i_C,'collector current in amperes')
disp(V_CE,'collector to emitter voltage in volts')
end
//c)active region
V_BE=0.7; //base to emitter voltage in active state
i_B=(V_CC-V_BE)/R_B; //base current
i_C=B*i_B; //collector current in active state
V_CE=V_CC-i_C*R_C; //collector to emitter voltage
if((V_CE>0.2)&(i_B>0)) then, //active state conditions
disp(i_C,'collector current in amperes')
disp(V_CE,'collector to emitter voltage in volts')
end
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