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+//Tested on Windows 7 Ultimate 32-bit

+//Chapter 9 Frequency Response of Amplifier Pg no. 318 and 319

+clear;

+clc;

+

+//Given

+//Figure 9.31

+

+VGS=12;//gate to source voltage in volts

+IGSS=40D-9;//gate saturation current in amperes

+VDD=12;//drain supply voltage in volts

+RD=6.8D3;//drain resistance in ohms

+RG=15D6;//gate resistance in ohms

+Cin=0.001D-6;//input coupling capacitance in farads

+Cout=0.001D-6;//output coupling capacitance in farads

+

+//Solution

+

+Rin_gate=VGS/IGSS;//gate input resistance in ohms

+Rin=Rin_gate*RG/(Rin_gate+RG);//input resistance in ohms

+fc=1/(2*%pi*Rin*Cin);//cutoff frequency in hertz

+printf("Cutoff frequency for input RC network fc = %.2f Hz",fc);