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.Management Sciences
Category: Field Effect Transistors – FET
The two important advantages of a JFET are _________________?
0
A. high input impedance and square-law property
B. inexpensive and high output impedance
C. low input impedance and high output impedance
D. none of the above
A certain JFET data sheet gives VGS(off) = -4 V. The pinch-off voltage Vp is _____________?
A. +4 V
B. -4 V
C. dependent on VGS
D. data insufficient
If load resistance in the above question (Q.49) is removed, the output voltage will_____________?
A. increase
B. decrease
C. stay the same
D. be zero
The input control parameter of a JFET is __________________?
A. gate voltage
B. source voltage
C. drain voltage
D. gate current
If the gate of a JFET is made less negative, the width of the conducting channel__________________?
A. remains the same
B. is decreased
C. is increased
D. none of the above
A n-channel D-MOSFET with a positive VGS is operating in _______________?
A. the depletion-mode
B. the enhancement-mode
C. cut off
D. saturation
In class A operation, the input circuit of a JFET is ____________ biased?
A. forward
B. reverse
C. not
D. none of the above
The constant-current region of a JFET lies between______________?
A. cut off and saturation
B. cut off and pinch-off
a. and IDSS
C. pinch-off and breakdown
A JFET has high input impedance because _________________?
A. it is made of semiconductor material
B. input is reverse biased
C. of impurity atoms
D. none of the above
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