Question

Consider a self/fixed biased(RG=1MΩ, RD=2KΩ, RS=0Ω, VDD=10V) common-source amplifier having DEMOSFET (VP=-4V, IDSS=10mA, yOS=10µs). Calculate its voltage gain while taking all the approximations permitted.

Answer 1

Answer:

1In a JFET drain current is maximum when VGS is

(a) Zero

(b) Positive

(c) Negative

(d) Equal to pinch-off voltage

5.2An n-channel JFET has pinch-off voltage Vp = -4 volts. Given VGS = -1V, the

minimum VDS for the device to operate in the pinch-off region will be

(a) + 1V

(b) + 3V

(c) + 4V

(d) + 5V

5.3In the self bias circuit for n-JFET shown in figure, VGS is