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diff --git a/1583/CH7/EX7.4/Oscillators_Ex_7_4.sce b/1583/CH7/EX7.4/Oscillators_Ex_7_4.sce
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+clc
+//Chapter 7:Conditions for Oscillation
+//example 7.4 page no 255
+//given
+gm=6*10^-3
+r=4
+f=10^6
+disp('Assume (w*Cm)^-1=X')
+X=sqrt(r/gm)//minimum permissible reactance
+Cm=(2*%pi*f*X)^-1//maximum series capacitance
+mprintf('the minimum permissible reactance is %f ohm \n the maximum series capacitance is %f pF',X,Cm*1e12)
diff --git a/1583/CH7/EX7.4/Result_of_Chapter_7_Ex7_4.jpg b/1583/CH7/EX7.4/Result_of_Chapter_7_Ex7_4.jpg
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+++ b/1583/CH7/EX7.4/Result_of_Chapter_7_Ex7_4.jpg