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Home ‣ Digital Electronics ‣ Interfacing to the Analog World Comments
  • Question

  • What is the resolution of a D/A converter?


  • Options
  • A. It is the reciprocal of the number of discrete steps in the D/A output.
  • B. It is the comparison between the actual output of the converter and its expected output.
  • C. It is the deviation between the ideal straight-line output and the actual output of the converter.
  • D. It is the converter's ability to resolve between forward and reverse steps when sequenced over its entire range of inputs.

  • Correct Answer
  • It is the reciprocal of the number of discrete steps in the D/A output. 

    • Interfacing to the Analog World problems

    Search Results

    • 1. Three characteristics of op amps make them almost ideal amplifiers: very high input impedance, very low impedance, and ________.

    • Options
    • A. very high voltage gain
    • B. unlimited bandwidth
    • C. a low slew rate
    • D. very high current gain
      • Discuss
    • 2. Which of the equations below expresses the voltage gain relationship for an operational amplifier?

    • Options
    • A. Vout = Vin/Av
    • B. Vout/Vin = Rout/Rin
    • C. Vin/Vout = Rout/Rin
    • D. Vout/Vin = ?Rf/Rin
      • Discuss
    • 3. ________ are the most linear of all the temperature transducers.

    • Options
    • A. Thermistors
    • B. Thermocouples
    • C. IC temperature sensors
    • D. Resistance temperature detectors
      • Discuss
    • 4. What is one advantage to using a parallel-encoded (flash) ADC?

    • Options
    • A. less expensive
    • B. very fast conversion
    • C. less complicated circuit
      • Discuss
    • 5. If an analog signal is to be converted to an 8-bit resolution, how many comparators are used in a parallel-encoded ADC?

    • Options
    • A. 127
    • B. 128
    • C. 255
    • D. 256
      • Discuss
    • 6. Referring to the given figure, what should the display on the scope look like if the A/D converter is working properly?


    • Options
    • A. It should be a circular Lissajous pattern resulting from the simultaneous application of ramps to the vertical and horizontal inputs of the oscilloscope.
    • B. The pattern should be a straight line across the screen due to the equal but opposite voltages being applied to the scope inputs.
    • C. A uniform stairstep pattern should be displayed.
    • D. The scope should display a sequential binary count with the LSB on the left and the MSB on the right side of the display.
      • Discuss
    • 7. Referring to the given figure, what appears to be wrong, if anything, with the output of the D/A converter?


    • Options
    • A. The input signal is probably noisy.
    • B. There appears to be some nonlinearity in the scope display.
    • C. The converter has a nonmonotonic output error.
    • D. It appears that certain input codes are incorrect; double-check the input coding.
      • Discuss
    • 8. How many different voltages can be output from a DAC with a 6-bit resolution?

    • Options
    • A. 6
    • B. 16
    • C. 32
    • D. 64
      • Discuss
    • 9. If the same analog signal is to be converted to an 8-bit resolution using a counter-ramp ADC, how many comparator circuits would be used?

    • Options
    • A. 1
    • B. 8
    • C. 127
    • D. 255
      • Discuss
    • 10. The process by which a computer acquires digitized analog data is referred to as ________.

    • Options
    • A. data acquisition
    • B. monotonicity
    • C. analog resolution
    • D. systematic digital conversion
      • Discuss

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