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+// Exa 1.28
+format('v',5);
+clc;
+clear;
+close;
+// Given data
+Ao= 10^4;// in V/V
+f_t= 10^6;// in Hz
+R2byR1= 20;
+omega_t= 2*%pi*f_t;
+omega_3dB= omega_t/(1+R2byR1);
+f3dB= omega_3dB/(2*%pi);// in Hz
+f3dB= f3dB*10^-3;// in kHz
+disp(f3dB,"3-dB frequency of the closed loop amplifier in kHz is : ")
+f3dB= 0.1*f3dB;// in Hz
+voBYvi= -R2byR1/sqrt(1+(2*%pi*f3dB/omega_3dB)^2);
+voBYvi= abs(voBYvi);// in v/v
+disp(voBYvi,"Gain in v/v is : ")
+
+
+