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diff --git a/752/CH4/EX4.14.1/4_14_1.sce b/752/CH4/EX4.14.1/4_14_1.sce
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+clc;
+// page no 140
+// prob no 4_14_1
+//Noise fig. of an amplifier is 13 dB with BW=1MHz
+f=13;//Noise figure of an amplifier
+Bn=1*10^6;
+kT=4*10^-21;//k is Boltzman constant in J/K & T is room temp
+F=10^(f/10);
+//Determination of equivalent amplifier input noise
+Pna=(F-1)*kT*Bn;
+disp('pW',Pna*10^12,'The value of input noise is');
+\ No newline at end of file