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+// Example 11.7: Low frequency gain, Upper 3 dB frequency
+clc, clear
+// Without feedback
+AM=1e4; // Low frequency values of A
+wH=100; // Upper 3 dB frequency in hertz
+// With feedback
+R1=1; // in kilo-ohms
+R2=9; // in kilo-ohms
+bta=R1/(R1+R2); // Feedback factor
+AfM=AM/(1+bta*AM); // Low frequency gain
+wHf=wH*(1+bta*AM); // Upper 3 dB frequency in hertz
+wHf=wHf*1e-3; // Upper 3 dB frequency in kilo-hertz
+disp("For closed loop amplifier :");
+disp(AfM,"Low frequency gain =");
+disp(wHf,"Upper 3 dB frequency (kHz) =");
+\ No newline at end of file