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Chapter 3

Q. 3.5

The following information is included on the data sheet of an n-channel JFET.
I_{DSS}=20mA ; V_P=-8Volt
g_{mo}=5000\mu mhos
and,

Find the values of the drain current and transconductor at
V_{GS}=-4V.

Step-by-Step

Verified Solution

Given that
I_{DSS}=20mA
andV_P=-8V; g_{mo}=5000\mu mhos
V_{GS}=-4V
we know that
I_D=I_{DSS} (1-\frac{V_{GS}}{V_P})^2
=20(1-\frac{(-4)}{(-8)})^2=5mA
Also, transconductor is given by
g_m=gm_0({1-\frac{V_{GS}}{V_P} })=5000(1-\frac{(-4)}{(-8)} )=2500\mu mhos Ans.