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+//Finding the Circuit values of a UJT Triggering ciruit
+//Example 17.2(Page No-774) 
+clc
+clear
+//given data 
+Vs=30;//in volts
+n=0.51;
+Ip=10*10^-6;//amperes
+Vv=3.5;//volts
+Iv=10*10^-3;//amps
+f=60;//Hz
+tg=50*10^-6;//in sec
+Vd=0.5;//volts
+T=1/f;//sec
+Vp=n*Vs+Vd;
+C=0.5*10^-6;//assume C 
+x=(Vs-Vp)/Ip;//upper limit of R
+x=x*10^-6;//in megaohms
+printf('upper limit of R:%2.2f kohms\n',x);
+y=(Vs-Vv)/Iv;//lower limit of R
+y=y*10^-3;//in kiloohms
+printf('lower limit of R:%2.2f Mohms\n',y);
+R=1/(f*C*log(1/(1-n)));
+R=R*10^-3;//in kohms
+printf('Value of R:%2.2f kohms\n',R);
+Vb1=Vp;//peak gate voltage
+Rb1=tg/C;
+printf('Rb1:%d Ohms\n',Rb1);
+Rb2=10^4/(n*Vs);
+printf('Rb2:%.2f Ohms\n',Rb2);