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diff --git a/281/CH4/EX4.3/example4_3.sce b/281/CH4/EX4.3/example4_3.sce
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+disp('chapter 4 ex4.3')
+disp('given')
+disp('capacitor coupled voltage follower design')
+disp("lower cut off frequency for the circuit =50Hz")
+disp('Rl=3.9kohms')
+disp("R1max=0.1Vbe/Ibmax")
+disp("Vbe=0.7volts")
+disp("Ibmax=500nA")
+Vbe=0.7 
+Ibmax=500*10^(-9)
+R1max=0.1* Vbe/ Ibmax
+disp("R1max= ")
+disp('ohms',R1max)
+disp("R1+R2=Rmax")
+R1=R1max/2
+R2=R1
+disp("assume R1=68Kohms")
+R1=68000
+f1=50
+disp("Xc1=R1/10 at F1")
+disp("C1=1/(2*pi*f1*(R1/10))")
+C1=1/(2*%pi*f1*(R1/10))
+C2=C1
+disp('farads',C1)
+Rl=3900
+disp('farads',C2)
+M=50000
+disp("M=50000")
+disp("Zin=(1+M)*R1")
+Zin=(1+M)*R1
+disp('ohms',Zin)
+disp("The circuit voltage should be normally between 9 to 18 volts")