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+//clear//
+//Example5.4:System gain and upper break frequency
+//Page 140
+//figure 5.6
+clear;
+clc;
+//STAGE 1
+disp("Stage 1");
+Rf1=14000;      //in Ohms
+Ri1=2000;         //in Ohms
+Av1=1+(Rf1/Ri1);
+disp(Av1,"Av");
+Anoise1=1+(Rf1/Ri1);
+disp(Anoise1,"Anoise");
+GBW=1*10^6;         //in Hz (from Datasheet)
+f1=GBW/Anoise1;
+disp(f1,"f2");
+
+//STAGE 2
+disp("Stage 2");
+Rf2=20000;      //in Ohms
+Ri2=10000;         //in Ohms
+Av2=-(Rf2/Ri2);
+disp(Av2,"Av");
+Anoise2=1+(Rf2/Ri2);
+disp(Anoise2,"Anoise");
+GBW=1*10^6;         //in Hz (from Datasheet)
+f2=GBW/Anoise2;
+disp(f2,"f2");
+
+//STAGE 3
+disp("Stage 3");
+Rf3=12000;      //in Ohms
+Ri3=4000;         //in Ohms
+Av3=1+(Rf3/Ri3);
+disp(Av3,"Av");
+Anoise3=1+(Rf3/Ri3);
+disp(Anoise3,"Anoise");
+GBW=1*10^6;         //in Hz (from Datasheet)
+f3=GBW/Anoise3;
+disp(f3,"f2");
+
+//SYSTEM
+Av=Av1*Av2*Av3;
+disp(Av,"Av");
+
+disp("Dominant break frequency here is 125kHz");
+GBW=f1*64;
+disp(GBW,"Gain bandwidth product is");