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diff --git a/226/CH16/EX16.2/example2_sce.sce b/226/CH16/EX16.2/example2_sce.sce
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+//chapter 16
+//example 16.2
+//page 672
+printf("\n")
+printf("given")
+f=40*10^3;L=100*10^-3;vp=8;
+disp("colpitts oscillator")
+Ct=1/(4*3.14*3.14*(f^2)*L)
+C1=10*Ct
+C2=1/((1/Ct)-(1/C1))
+C2=180*10^-12;//use standard value
+Xc2=1/(2*3.14*f*C2)
+Xc1=1/(2*3.14*f*C1)
+R1=10*Xc1
+R1=27*10^3;//use standard value
+Acl=C1/C2
+R2=Acl*R1
+R2=270*10^3;//use stabdard value
+R3=(R1*R2)/(R1+R2)
+f2=Acl*f
+SR=2*3.14*f*vp
+\ No newline at end of file