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+// Chapter7
+// Page.No-231
+// Example_7_5
+// Sketch the Transfer Curve
+// Given
+clc;
+clear;
+Vz1=1;         //in V
+Vz2=2.2;         //in V
+Rf=12000;           //in Ohm
+Ri=10000;           //in Ohm
+R2=15000;           //in Ohm
+R1=20000;           //in Ohm
+Vbreak1=Vz1+0.7;
+printf("\n Vbreak1_in +_ %.2f V",Vbreak1);
+Vbreak2=Vz2+0.7;
+printf("\n Vbreak2_in +_ %.2f V",Vbreak2);
+
+Av=-Rf/Ri;
+printf("\n Av %.1f ",Av);
+Av1=-Rf*(Ri+R1)/(R1*Ri);
+printf("\n Av1 %.1f ",Av1);
+
+Av2=-Rf*(Ri*R1+R1*R2+R2*Ri)/(R1*Ri*R2);
+printf("\n Av2 %.1f ",Av2);
+Vbreak1_out=Av*Vbreak1
+Vbreak2_out=Vbreak1_out+Av2*(Vbreak2-Vbreak1);
+printf("\n Vbreak1_out %.2f V ",Vbreak1_out);
+printf("\n Vbreak2_out %.2f V",Vbreak2_out);
+//graph
+t=-5:0.01:5;
+L=length(t);
+for i=1:L
+    //if t(i)<  then
+    //end
+    if t(i)<-2.9 then
+        x1(i)=Av2*t(i)-3;
+     elseif t(i)<-1.15 then 
+        x1(i)=Av1*t(i)-0.67;
+    elseif t(i)<1.15 then
+        x1(i)=Av*t(i) ;
+    elseif t(i)<2.9 then
+        x1(i)=Av1*t(i)+0.67 ;
+    elseif t(i)>2.9 then
+        x1(i)=Av2*t(i)+3;   
+    end;
+end;  
+clf;  
+plot2d1(t,x1);
+xtitle('Transfer Characteristics','Vin','Vout')
+
+