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diff --git a/1223/CH3/EX3.5/Ex3_5.sce b/1223/CH3/EX3.5/Ex3_5.sce
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+clear;
+clc;
+//Example 3.5
+b=100;
+Vbe=0.7;//(V)
+Vce=0.2;//(V)
+Vbb=8;//(v)
+Rb=220;//(KOhm)
+Ib=(Vbb-Vbe)/Rb
+printf('\nbase current=%f mA\n',Ib)
+//transistor in active region
+Ic=b*Ib;
+printf('\ncollector current=%.3f mA\n',Ic)
+Vcc=10;//(V)
+Rc=4;//(KOhm)
+Vce=Vcc-Ic*Rc;
+printf('\ncollector emitter voltage=%.2f V\n',Vce)
+//saturation
+Vce=0.2;//(V)
+Ic=(Vcc-Vce)/Rc;
+printf('\nsaturation collector current=%.2f mA\n',Ic)
+x=Ic/Ib
+//which is <b
+Ie=Ic+Ib;
+printf('\nemitter current=%f mA\n',Ie)