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Interfacing to the Analog World problems

  • 1. A counter-ramp ADC uses a comparator to compare the input voltage with ________.

  • Options
  • A. a binary number
  • B. the output of a counter
  • C. the output of a DAC
  • D. a voltage divider network
    • Discuss
  • 2. A counter-ramp ADC stops counting when ________.

  • Options
  • A. the input voltage equals the DAC staircase voltage
  • B. the counter reaches a maximum count
  • C. the input voltage equals 5 volts
  • D. the DAC staircase voltage equals 5 volts
    • Discuss
  • 3. The main advantage of the tracking A/D converter over the stairstep-ramp A/D converter is that ________.

  • Options
  • A. it does not require a counter
  • B. it uses an up/down counter to indicate the polarity of the input voltage
  • C. it uses an up/down counter to measure both positive and negative voltages
  • D. it is faster
    • Discuss
  • 4. The circuit shown below is a(n) ________.

    Digital Electronics Interfacing to the Analog World: The circuit shown below is a(n) ________.


  • Options
  • A. R/2R ladder D/A converter
  • B. four-bit decoder
  • C. binary-weighted-input DAC
  • D. four-bit A/D converter
    • Discuss
  • 5. The number of binary bits at the input of a DAC or the output of an ADC is known as ________.

  • Options
  • A. accuracy
  • B. linearity
  • C. resolution
  • D. monotonicity
    • Discuss
  • 6. The output of the circuit in the given figure (a) at point X on figure (b) will be ________.

    Digital Electronics Interfacing to the Analog World: The output of the circuit in the given figure (a) at point X on figure (b) will be ________.


  • Options
  • A. 1.011 V
  • B. 2.75 V
  • C. ?1.011 V
  • D. ?2.75 V
    • Discuss
  • 7. ________ ADCs have a fixed value of conversion time that is not dependent on the value of the analog input.

  • Options
  • A. Substandard
  • B. Dual
  • C. Recessive-approximation
  • D. Successive-approximation
    • Discuss
  • 8. A signal ________ is produced by sampling the signal at a rate less than the minimum rate identified by Nyquist.

  • Options
  • A. Nyquist
  • B. sampling frequency
  • C. basis
  • D. alias
    • Discuss
  • 9. The fastest analog-to-digital converter is the ________.

  • Options
  • A. counter ADC
  • B. successive-approximation ADC
  • C. dual slope ADC
  • D. parallel ADC
    • Discuss
  • 10. A binary-weighter resistor DAC is practical only up to a resolution of ________.

  • Options
  • A. 10 bits
  • B. 2 bits
  • C. 8 bits
  • D. 4 bits
    • Discuss

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