logo

CuriousTab

CuriousTab

Discussion

Home ‣ Electronics ‣ Special-Purpose Op-Amp Circuits Comments
  • Question

  • If an operational transconductance amplifier (OTA) is used as an amplitude modulator, the voltage gain is varied by applying a _________ voltage to the ______ input.


  • Options
  • A. demodulation, bias
  • B. modulation, bias
  • C. bias, modulation
  • D. low-frequency, bias

  • Correct Answer
  • modulation, bias 

    • Special-Purpose Op-Amp Circuits problems

    Search Results

    • 1. The gain of an OTA is the ratio of the output current to the input voltage, and is measured in _____________.

    • Options
    • A. amps
    • B. volts
    • C. siemens
    • D. no units
      • Discuss
    • 2. A Schmitt trigger is a comparator with _______.

    • Options
    • A. modulation
    • B. a closed-loop gain less than one
    • C. hysteresis
    • D. a high threshold value
      • Discuss
    • 3. An instrumentation amplifier has extremely high ________, good ________, and high ________.

    • Options
    • A. input impedance, common-mode rejection, gain
    • B. noise factor, grounding, power
    • C. working voltages, current capacity, output impedance
    • D. output gain, output loading, power
      • Discuss
    • 4. A(n) ________ amplifier is used if the application requires a high sensitivity to low-level signals and protection from high-voltage associated circuits.

    • Options
    • A. basic instrumentation
    • B. operational transconductance
    • C. log/antilog amplifier
    • D. isolation
      • Discuss
    • 5. The ________ amplifier is ideal for amplitude modulation since its gain is current-controlled.

    • Options
    • A. log
    • B. operational transconductance
    • C. isolation
    • D. Schmitt
      • Discuss
    • 6. The precision rectifier circuit is designed to _________.

    • Options
    • A. rectify waveforms with very large voltage swings
    • B. rectify waveforms with very small voltage swings
    • C. rectify precision waveforms
    • D. amplify and rectify waveforms
      • Discuss
    • 7. The basic instrumentation amplifier has ________ input(s).

    • Options
    • A. 1
    • B. 2
    • C. capacitive
    • D. resistive
      • Discuss
    • 8. A 2% 55 kΩ resistor would have a color coding of green, green, black, red, red.

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. 4 amperes will flow through a 10 Ω resistor if 20 volts are placed across the resistor.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. The resistive track of a rheostat or potentiometer can be classified as having either a linear or tapered resistance.

    • Options
    • A. True
    • B. False
      • Discuss

    Comments

    There are no comments.
Enter a new Comment




Aptitude

Engineering

Programming

Reasoning

Links

Copyright ©CuriousTab. All rights reserved.