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Home ‣ Electronics ‣ Transistors and Applications Comments
  • Question

  • In order for feedback oscillators to have any practical value, the gain has to be


  • Options
  • A. < 1
  • B. self-adjusting
  • C. stabilized
  • D. nonlinear

  • Correct Answer
  • self-adjusting 

    • Transistors and Applications problems

    Search Results

    • 1. Three different points are shown on a dc load line. The upper point represents the

    • Options
    • A. minimum current gain
    • B. quiescent point
    • C. saturation point
    • D. cutoff point
      • Discuss
    • 2. A source follower has a voltage gain (Av) of

    • Options
    • A. AV = gmRd
    • B. AV = gmRS
    • C.
    • D.
      • Discuss
    • 3. To get a negative gate-source voltage in a self-biased JFET circuit, you must use a

    • Options
    • A. voltage divider
    • B. source resistor
    • C. ground
    • D. negative gate supply voltage
      • Discuss
    • 4. A JFET

    • Options
    • A. is a current-controlled device
    • B. has a low input resistance
    • C. is a voltage-controlled device
    • D. is always forward-biased
      • Discuss
    • 5. Often a common-collector will be the last stage before the load; the main function of this stage is to

    • Options
    • A. provide voltage gain
    • B. buffer the voltage amplifiers from the low-resistance load
    • C. provide phase inversion
    • D. provide a high-frequency path to improve the frequency response
      • Discuss
    • 6. The capacitor that produces an ac ground is called a(n)

    • Options
    • A. coupling capacitor
    • B. dc open
    • C. bypass capacitor
    • D. ac open
      • Discuss
    • 7. The depletion-mode MOSFET

    • Options
    • A. can operate with only positive gate voltages
    • B. can operate with only negative gate voltages
    • C. cannot operate in the ohmic region
    • D. can operate with positive as well as negative gate voltages
      • Discuss
    • 8. In a class B push-pull amplifier, the transistors are biased slightly above cutoff to avoid

    • Options
    • A. crossover distortion
    • B. unusually high efficiency
    • C. negative feedback
    • D. a low input impedance
      • Discuss
    • 9. The primary function of the bias circuit is to

    • Options
    • A. hold the circuit stable at VCC
    • B. hold the circuit stable at vin
    • C. ensure proper gain is achieved
    • D. hold the circuit stable at the designed Q-point
      • Discuss
    • 10. The formula used to calculate the approximate ac resistance of the base-emitter diode (re) is

    • Options
    • A.
    • B. re ≈ 25 mV × IC
    • C.
    • D.
      • Discuss

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