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+//chapter 11
+//example 11.13
+//page 342
+clear all;
+clc ;
+//given
+Rl=180;//load resistance in kohm
+Vcc=20;//supply voltage V
+f1=150;//lower cutoff frequency Hz
+Zi=500;//ip impedance kohm
+Idmax=2;//drain current mA
+Vgs=-4.1;//gate to source voltage
+Vpmax=6;//maximum peak voltage
+Vdsmin=Vpmax+1+Vgs;
+Vr34=Vcc-Vdsmin;
+VR31=8.5;
+VR41=VR31;Id=2;
+R3=VR31/Id;
+R4=R3;
+printf("\nR4=R3= %.2f kohm ,use standard value 3.9 kohm",R4);R4=3.9;
+VR3=Id*R4;
+VR4=VR3;
+VR2=VR4+Vgs;
+VR1=Vcc-VR2;
+R2=560;//assuming
+R1=10^-3*(VR1*R2)/VR2;
+printf("\nR1= %.1f Mohm,use standard value 2.7 Mohm ",R1);R1=2.7;
+Ic2=1;
+VR5=VR3-0.7;
+R5=VR5/Ic2;
+printf("\nR5= %.1f kohm,use standard value 6.8 kohm ",R5);R5=6.8;
+Ic2=VR5/R5;
+VR6=Vcc-VR5-3;
+R6=VR6/Ic2;
+printf("\nR6= %.1f kohm,use standard value 8.2 kohm ",R6);R6=8.2;//R6<<Rl
+
+
+
+