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clear//
//Variables
gmo = 5.0 * 10**-3 //Maximum transconductance (in Siemen)
RD = 1.0 * 10**3 //Drain resistance (in ohm)
RS = 200.0 //Source resistance (in ohm)
ID = 5.0 * 10**-3 //Drain current (in Ampere)
//Calculation
R1i = RS * 1/gmo /(RS + 1/gmo) //Input resistance (in ohm)
VS = ID * RS //Source voltage (in volts)
VGS = VS //Gate-to-Source voltage (in volts)
IDSS = 2 * ID //Supply current (in Ampere)
VGSoff = -2 * IDSS / ID //Gate-to-source cut off voltage (in volts)
gm = gmo * (1 - abs(VGS / VGSoff)) //Transconductance (in Siemen)
Av = gm * RD //Voltage gain
//Result
printf("\n Input resistance is %0.3f ohm.\na.c. voltage gain is %0.3f .",R1i,Av)
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