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Electronics
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Field Effect Transistors (FET)
Comments
Question
With the E-MOSFET, when gate input voltage is zero, drain current is:
Options
A. at saturation
B. zero
C. I
DSS
D. widening the channel
Correct Answer
zero
Field Effect Transistors (FET) problems
Search Results
1. What is the input impedance of a common-gate configured JFET?
Options
A. very low
B. low
C. high
D. very high
Show Answer
Scratch Pad
Discuss
Correct Answer: very low
2. A "U" shaped, opposite-polarity material built near a JFET-channel center is called the:
Options
A. gate
B. block
C. drain
D. heat sink
Show Answer
Scratch Pad
Discuss
Correct Answer: gate
3. I
DSS
can be defined as:
Options
A. the minimum possible drain current
B. the maximum possible current with V
GS
held at ?4 V
C. the maximum possible current with V
GS
held at 0 V
D. the maximum drain current with the source shorted
Show Answer
Scratch Pad
Discuss
Correct Answer: the maximum possible current with V
GS
held at 0 V
4. In an n-channel JFET, what will happen at the pinch-off voltage?
Options
A. the value of V
DS
at which further increases in V
DS
will cause no further increase in I
D
B. the value of V
GS
at which further decreases in V
GS
will cause no further increases in I
D
C. the value of V
DG
at which further decreases in V
DG
will cause no further increases in I
D
D. the value of V
DS
at which further increases in V
GS
will cause no further increases in I
D
Show Answer
Scratch Pad
Discuss
Correct Answer: the value of V
DS
at which further increases in V
DS
will cause no further increase in I
D
5. The overall input capacitance of a dual-gate D-MOSFET is lower because the devices are usually connected:
Options
A. in parallel
B. with separate insulation
C. with separate inputs
D. in series
Show Answer
Scratch Pad
Discuss
Correct Answer: in series
6. Which type of JFET bias requires a negative supply voltage?
Options
A. feedback
B. source
C. gate
D. voltage divider
Show Answer
Scratch Pad
Discuss
Correct Answer: gate
7. Which component is considered to be an "OFF" device?
Options
A. transistor
B. JFET
C. D-MOSFET
D. E-MOSFET
Show Answer
Scratch Pad
Discuss
Correct Answer: E-MOSFET
8. When is a vertical channel E-MOSFET used?
Options
A. for high frequencies
B. for high voltages
C. for high currents
D. for high resistances
Show Answer
Scratch Pad
Discuss
Correct Answer: for high currents
9. A very simple bias for a D-MOSFET is called:
Options
A. self biasing
B. gate biasing
C. zero biasing
D. voltage-divider biasing
Show Answer
Scratch Pad
Discuss
Correct Answer: zero biasing
10. Junction Field Effect Transistors (JFET) contain how many diodes?
Options
A. 4
B. 3
C. 2
D. 1
Show Answer
Scratch Pad
Discuss
Correct Answer: 2
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