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diff --git a/752/CH6/EX6.6.2/6_6_2.sce b/752/CH6/EX6.6.2/6_6_2.sce
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+clc;
+// page no 212
+// prob no 6.6.2
+//Voltage controlled Clapp oscillator
+// Capacitor is in pF and inductor in uH
+C1=300; C2=300; Cc=20; L=100;
+// A) With zero applied bias,the total tuning capacitor is
+Vd1=0;a=0.5;Co=20;
+Cd1=Co/(1-(Vd1/0.5))^a;
+Cs1=1/((1/C1)+(1/C2)+(1/Cc)+(1/Cd1));
+disp('pF',Cs1, +'1.The total tuning capacitor is');
+// The frequency of oscillation is
+f=1/(2*%pi*sqrt(L*10^-6*Cs1*10^-12));
+disp('Hz',f,'2.The frequency of oscillation is');
+// B) With a reverse bias of -7 v, the tuning capacitance becomes
+Vd2=-7;
+Cd2=Co/(1-(Vd2/0.5))^a;
+Cs2=1/((1/C1)+(1/C2)+(1/Cc)+(1/Cd2));
+disp('pF',Cs2, +'3.The total tuning capacitor is');
+// The frequency of oscillation is
+f=1/(2*%pi*sqrt(L*10^-6*Cs2*10^-12));
+disp('Hz',f,'4.The frequency of oscillation is');
+\ No newline at end of file