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.Management Sciences
Category: Field Effect Transistors – FET
A certain p-channel E-MOSFET has VGS(th) = -2V. If VGS= 0V, the drain current is ____________?
A. 0 mA
B. ID(on)
C. maximum
D. IDSS
The pinch-off voltage in a JFET is analogous to _____________ voltage in a vacuum tube?
A. anode
B. cathode
C. grid cut off
D. none of the above
A certain common-source JFET has a voltage gain of 10. If the source bypass capacitor is removed, ______________?
A. the voltage gain will increase
B. the transconductance will increase
C. the voltage gain will decrease
D. the Q-point will shift
In a JFET, when drain voltage is equal to pinch-off voltage, the depletion layers ______________?
A. almost touch each other
B. have large gap
C. have moderate gap
D. none of the above
Which of the following devices has the highest input impedance ?
A. JFET
B. MOSFET
C. Crystal diode
D. ordinary transistor
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