_____________ has the lowest noise-level?
A. triode
B. ordinary trnsistor
C. tetrode
D. JFET
Field Effect Transistors – FET
Which of the following devices has the highest input impedance ?
Which of the following devices has the highest input impedance ?
A. JFET
B. MOSFET
C. Crystal diode
D. ordinary transistor
The two important advantages of a JFET are _________________?
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
In a JFET, when drain voltage is equal to pinch-off voltage, the depletion layers ______________?
In a JFET, when drain voltage is equal to ch-off voltage, the depletion layers ______________?
A. almost touch each other
B. have large gap
C. have moderate gap
D. none of the above
A JFET has high input impedance because _________________?
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
A JFET has ____________ power gain?
A JFET has ____________ power gain?
A. small
B. very high
C. very small
D. none of the above
If the reverse bias on the gate of a JFET is increased, then width of the conducting channel ______________?
If the reverse bias on the gate of a JFET is increased, then width of the conducting channel ______________?
A. is decreased
B. is increased
C. remains the same
D. none of the above
A JFET is a__________ driven device?
A JFET is a__________ driven device?
A. current
B. voltage
C. both current and voltage
D. none of the above
A MOSFET has______________ terminals?
A MOSFET has______________ terminals?
A. two
B. five
C. four
D. three
The input control parameter of a JFET is __________________?
The input control parameter of a JFET is __________________?
A. gate voltage
B. source voltage
C. drain voltage
D. gate current