JFET

A "field effect transistor" or a "junction field effect transistor", JFET. With the reverse biased input junction, it has a very high input impedance. Having a high input impedance minimizes the interference with or "loading" of the signal source when a measurement is made.

FIXED BIAS CONFIGURATION

Formulas

Ig≈ 0A

Id=Is

-Vgs=-Vgg

Shockley equation

Id=Idss(1-Vgs/Vp)²

V_DS=V_DD-I_DR_D

V_S=0

V_DS=V_D-V_S

V_D=V_DS+V_S

V_D=V_DS

V_S=V_G-V_S

V_G=V_GS+V_S=V_GS

V_G=V_GS

problem:

Determine the following for the network:

problem:

Determine the following for the network:

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