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diff --git a/863/CH4/EX4.4/Ex4_4.sce b/863/CH4/EX4.4/Ex4_4.sce
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+++ b/863/CH4/EX4.4/Ex4_4.sce
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+//Caption:Determine (a)Capacitance that can give max turn on time (b)Max frequency
+//Ex4.4
+clc;
+clear;
+close;
+Rs=600//Source resistor(in ohm)
+Rb=5.6//Base resistor(in kilo ohm)
+t=70//Turn on time(in ns)
+C=t*1000/(0.1*Rs)
+disp(C,'(a)Required capacitance(in pF)=')
+tre=2.3*Rb*C*10^(-3)
+f=1000/(2*tre)
+disp(f,'(b)Max Frequency(in Khz)=')
+\ No newline at end of file