Electronic Devices and Circuits - Engineering

Q1:

For a n-channel JFET with r0 = 10 kW, (VGs= 0 V, VP = - 6 V)the drain resistance rd at VGS= - 3 V is given by

A 40 kΩ

B 2.5 kΩ

C 4.44 kW

D 120 kW

ANS:A - 40 kΩ

rd = (r0)/(1-Vgs/Vp)^2.
= 10000/(1-(-3/-6))^2,
= 40000.