initial commit / add all books

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+//Determine Rb and percentage change in collector current due to temperature rise

+clear;

+clc;

+//soltion

+//given

+

+//Calculating the base resistance

+B=20;            //dc beta

+Rc=1*10^3;//ohm      //resistor connected to collector

+Ic=1*10^-3;//A       //collector current

+Vcc=6;//V            //Voltage supply across the collector resistor

+Vbe=0.3;//V       //for germanium

+Icbo=2*10^-6;//A       //collector  to base leakage current

+

+Ib=(Ic-(1+B)*Icbo)/B;

+Rb=(Vcc-Vbe)/Ib;

+

+printf("The value of resistor Ib is %.4f kΩ = 120 kΩ \n",Rb/1000);

+

+Rb=120*10^3;//ohm        approax

+

+//Now when temperature rise

+Icbo=10*10^-6;//A       //collector  to base leakage current

+B=25;            //dc beta

+Ic1=B*Ib+(B+1)*Icbo;          //changed collector current

+perc=(Ic1-Ic)*100/Ic;        //percentage increase

+printf("The percentage change in collector current is %.0f percent",perc);