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  • Question

  • The voltage gain of an OTA can be calculated using the formula


  • Options
  • A. The voltage gain of an OTA can be calculated using the formula
  • B. The voltage gain of an OTA can be calculated using the formula
  • C. The voltage gain of an OTA can be calculated using the formula
  • D. The voltage gain of an OTA can be calculated using the formula

  • Correct Answer
  •  

    • Special-Purpose Op-Amp Circuits problems

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    • 1. The signal voltage gain of an amplifier, Av, is defined as:

    • Options
    • A.
    • B. Av = IC × RC
    • C.
    • D.
      • Discuss
    • 2. Which of the following conditions are needed to properly bias an npn transistor amplifier?

    • Options
    • A. Forward bias the base/emitter junction and reverse bias the base/collector junction.
    • B. Forward bias the collector/base junction and reverse bias the emitter/base junction.
    • C. Apply a positive voltage on the n-type material and a negative voltage on the p-type material.
    • D. Apply a large voltage on the base.
      • Discuss
    • 3. 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
    • 4. 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
    • 5. 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
    • 6. 
      Refer to Figure 20-2. This circuit is a setup for

    • Options
    • A. an antilog amplifier
    • B. a constant-current source
    • C. an instrumentation amplifier
    • D. an isolation amplifier
      • Discuss
    • 7. 

      Which circuit is known as a current-to-voltage converter?


    • Options
    • A. a
    • B. b
    • C. c
    • D. d
      • Discuss
    • 8. In the classic three-op-amp instrumentation amplifier, the differential voltage gain is usually produced by the

    • Options
    • A. first stage
    • B. second stage
    • C. mismatched resistors
    • D. output op-amp
      • Discuss
    • 9. Circuits that shift the dc level of a signal are called

    • Options
    • A. limiters
    • B. clampers
    • C. peak detectors
    • D. dc converters
      • Discuss
    • 10. An instrumentation amplifier has a high

    • Options
    • A. output impedance
    • B. power gain
    • C. CMRR
    • D. supply voltage
      • Discuss

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