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+// Example 5.12:corner frequency and maximum GAIN
+clc;
+clear;
+close;
+Vcc=10;// Colector voltage in volts
+Beta= 100;
+Rc=1;// Collector resistance in killo ohms
+Rs=600;//SERIES RESISTANCE IN OHMS
+Re=0.2;// in kilo ohms
+R1= 50;// in kilo ohms
+R2= 10;// in kilo ohms
+Vbe=0.7;// Base to emitter voltage in volts
+C1=1;//capacitance in micro farad
+
+Vth=Vcc * (R2/(R1+R2)); // vOLTAGE AT BASE
+
+
+Rth= (R1*R2)/(R1+R2);
+Ib=((Vcc-Vbe)/((Rth+(1+Beta)*Re)*10^3))*10^5;//in micro ampere
+Icq= Beta*Ib*10^-3;//in milli ampere
+Vt=26;//volate at room termprature in milli volts
+gm= (Icq/Vt)*10^3;//transconductance in milli ampere per volts
+rpi= (Beta*Vt*10^-3)/(Icq*10^-3);//resistance
+Rb=Rth;//base resistance in killo ohms
+x=(rpi+(1+Beta)*Re*10^3);//
+y=(Rs+Rb*10^3);//
+ts=((x*y)/(x+y))*C1*10^-3;//in milli second
+fl= (1/(2*%pi*ts*10^-3));//corner frequency in hertz
+Ri=(x*Rb*10^-3)/(Rb+x*10^-3);//
+Av= ((gm*10^-3*rpi*Rc*10^3)*Rb*10^3)/((Ri+Rs*10^-3)*10^3*(x*10^-3+Rb)*10^3);
+disp (fl,"corner frequency in hertz is")
+disp(Av,"maximum gain is")