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+//Chapter 17, Example 17.4
+clc
+//Initialisation
+VDD=15                          //voltage 
+Vq=10                       //quiescent output voltage
+RD=2.5*10**3                    //resistance in Ohm
+Vp=-6                            //voltage
+IDSS=8*10**-3                           //saturation drain current in amp
+
+//Calculation
+VR=VDD-Vq                          //voltage 
+ID=VR/RD                         //quiescent drain current
+VGS=Vp*(1-sqrt(ID/IDSS))          //voltage
+Rs=VGS/ID                        //resistance in ohm
+
+
+//Results
+printf("Rs = %.1f kOhm\n",-Rs/1000)
+printf("ID = %d mA\n",ID*1000)
+printf("VGS = %d V\n",VGS)