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+//chapter11
+//example11.9
+//page210
+
+gain_beta=50
+Ib=20d-3 // mA
+
+// since gain_beta = Ic/Ib we get
+Ic=gain_beta*Ib
+Ie=Ic+Ib
+
+printf("emitter current = %.3f mA \n",Ie)