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.Management Sciences
Category: Field Effect Transistors – FET
When drain voltage equals the pinch-off-voltage, then drain current ___________ with the increase in drain voltage?
0
A. decreases
B. increases
C. remains constant
D. none of the above
A CS JFET amplifier has a load resistance of 10 kO , RD= 820O . If gm= 5mS and Vin= 500 mV, the output signal voltage is__________________?
A. 2.05 V
B. 25 V
C. 0.5 V
D. 1.89 V
A JFET is also called____________ transistor?
A. unipolar
B. bipolar
C. unijunction
D. none of the above
The two important advantages of a JFET are _________________?
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
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