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+// Example 7.1
+format('v',6)
+clc;
+clear;
+close;
+// given data
+V_CC= 10;// in V
+R_E= 430;// in Ω
+V_BE= 0.7;//in V
+V_B= 5;//in V
+// The collector saturation current,
+I_Csat= V_CC/R_E;// in A
+// The collector emitter voltage,
+V_CEcutoff= V_CC;// in V
+// The collector current,
+I_C= (V_B-V_BE)/R_E;// in A
+// The collector emitter voltage,
+V_CE= V_CC-(V_B-V_BE);// in V
+I_C= I_C*10^3;// in mA
+disp("Q-point is : "+string(V_CE)+" V, "+string(I_C)+" mA");
+disp("DC load line shown in figure")
+I_C= I_C*10^-3;// in A
+V_CE= 0:0.1:V_CEcutoff;// in V
+I_C= (V_CC-V_CE)/R_E*10^3;// in mA
+// The plot of DC load line
+plot(V_CE,I_C);
+xlabel("V_CE in volts");
+ylabel("I_C in mA");
+title("DC load line")