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Home Electronics 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. IDSS
  • D. widening the channel

  • Correct Answer
  • zero 


  • Field Effect Transistors (FET) problems


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    • 1. What is the input impedance of a common-gate configured JFET?

    • Options
    • A. very low
    • B. low
    • C. high
    • D. very high
    • Discuss
    • 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
    • Discuss
    • 3. IDSS can be defined as:

    • Options
    • A. the minimum possible drain current
    • B. the maximum possible current with VGS held at ?4 V
    • C. the maximum possible current with VGS held at 0 V
    • D. the maximum drain current with the source shorted
    • Discuss
    • 4. In an n-channel JFET, what will happen at the pinch-off voltage?

    • Options
    • A. the value of VDS at which further increases in VDS will cause no further increase in ID
    • B. the value of VGS at which further decreases in VGS will cause no further increases in ID
    • C. the value of VDG at which further decreases in VDG will cause no further increases in ID
    • D. the value of VDS at which further increases in VGS will cause no further increases in ID
    • Discuss
    • 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
    • Discuss
    • 6. Which type of JFET bias requires a negative supply voltage?

    • Options
    • A. feedback
    • B. source
    • C. gate
    • D. voltage divider
    • Discuss
    • 7. Which component is considered to be an "OFF" device?

    • Options
    • A. transistor
    • B. JFET
    • C. D-MOSFET
    • D. E-MOSFET
    • Discuss
    • 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
    • Discuss
    • 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
    • Discuss
    • 10. Junction Field Effect Transistors (JFET) contain how many diodes?

    • Options
    • A. 4
    • B. 3
    • C. 2
    • D. 1
    • Discuss


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