4 files changed, 59 insertions, 0 deletions
diff --git a/2528/CH3/EX3.1/Ex3_1.sce b/2528/CH3/EX3.1/Ex3_1.sce
new file mode 100755
index 000000000..7fb744deb
--- /dev/null
+++ b/2528/CH3/EX3.1/Ex3_1.sce
@@ -0,0 +1,17 @@
+//Chapter 3
+//Closed loop gain 
+//page 75
+//Example no 3-1
+//figure 3.4
+clc;
+clear;
+Aol=200;
+f2_ol=10000;     // in Hz
+B=0.04;
+Asp=Aol/(1+B*Aol);
+printf("\n Asp %.2f \n ",Asp);            //Result
+printf("\n Approximately Asp =1/B equal to %.0f \n",1/B);//result
+S=Aol/Asp;
+printf("\n S =%.0f \n",S);
+f2_sp=f2_ol*S;
+printf("\nf2_sp %.0f Hz",f2_sp);       //Result
diff --git a/2528/CH3/EX3.2/Ex3_2.sce b/2528/CH3/EX3.2/Ex3_2.sce
new file mode 100755
index 000000000..3843fd3ff
--- /dev/null
+++ b/2528/CH3/EX3.2/Ex3_2.sce
@@ -0,0 +1,12 @@
+//Chapter 3
+//page 76
+//Example no 3-2
+//figure 3.7
+clear;
+clc;
+Asp1=20
+Asp=10^(Asp1/20);
+printf("\n Asp =%.0f\n",Asp);//Result
+//Rf/Ri=Asp-1;
+printf("\n Rf/Ri=%.0f \n",Asp-1);//Result
+printf("Rf must be 9 times larger than Ri. \n There are many possibilities  ");//Result
diff --git a/2528/CH3/EX3.3/Ex3_3.sce b/2528/CH3/EX3.3/Ex3_3.sce
new file mode 100755
index 000000000..532c3d551
--- /dev/null
+++ b/2528/CH3/EX3.3/Ex3_3.sce
@@ -0,0 +1,17 @@
+//Chapter 3
+//page 82
+//Example no 3-3
+clc;
+clear;
+Zin_ol=300*10^3;       //in Ohms
+Zout=100;       //in Ohms
+Aol=50000;
+Zout_ol=100;
+Asp=100;
+S=Aol/Asp;
+printf("\n S = %.0f",S);//Result
+Zin_sp=S*Zin_ol;
+printf("\n Zin_sp = %.0f Ohm",Zin_sp);//Result
+Zout_sp=Zout_ol/S;
+printf("\n Zout_sp = %.1f Ohm",Zout_sp);//Result
+
diff --git a/2528/CH3/EX3.4/Ex3_4.sce b/2528/CH3/EX3.4/Ex3_4.sce
new file mode 100755
index 000000000..692a5d348
--- /dev/null
+++ b/2528/CH3/EX3.4/Ex3_4.sce
@@ -0,0 +1,13 @@
+//Chapter 3
+//Output current of circuit
+//page 88
+//Example no 3-4
+clc;
+clear;
+R1=9000;        // in Ohm
+R2=1000;        //in Ohm
+B=R2/(R1+R2);
+printf("\n B is %.2f\n",B);//Result
+//Aps=1/B;
+Aps=(R1+R2)/R2;
+printf("\n Aps = %.0f \n ",Aps);//Result