logo

CuriousTab

CuriousTab

Discussion

Home ‣ Digital Electronics ‣ Digital Signal Processing Comments
  • Question

  • In a 4-bit R/2R ladder digital-to-analog converter, because of negative feedback, the operational amplifier keeps the inverting (minus) input near ________.


  • Options
  • A. 5 volts
  • B. zero volts
  • C. a voltage determined by the binary weighted input
  • D. none of the above

  • Correct Answer
  • zero volts 

    • Digital Signal Processing problems

    Search Results

    • 1. If a DAC has a full-scale, or maximum, output of 12 V and accuracy of 0.1%, then the maximum error for any output voltage is ________.

    • Options
    • A. 12 V
    • B. 120 mV
    • C. 12 mV
    • D. 0 V
      • Discuss
    • 2. The resolution of a 6-bit DAC is ________.

    • Options
    • A. 63%
    • B. 64%
    • C. 15.9%
    • D. 1.59%
      • Discuss
    • 3. In a flash analog-to-digital converter, the output of each comparator is connected to an input of a ________.

    • Options
    • A. decoder
    • B. priority encoder
    • C. multiplexer
    • D. demultiplexer
      • Discuss
    • 4. Settling time is normally defined as the time it takes a DAC to settle within ________.

    • Options
    • A. 1/8 LSB of its final value when a change occurs in the input code
    • B. 1/4 LSB of its final value when a change occurs in the input code
    • C. 1/2 LSB of its final value when a change occurs in the input code
    • D. 1 LSB of its final value when a change occurs in the input code
      • Discuss
    • 5. Which of the following best defines Nyquist frequency?

    • Options
    • A. The frequency of resonance for the filtering circuit
    • B. The second harmonic
    • C. The lower frequency limit of sampling
    • D. The highest frequency component of a given analog signal
      • Discuss
    • 6. How are unwanted frequencies removed prior to digital conversion?

    • Options
    • A. Pre-filters
    • B. Digital signal processing
    • C. Sample-and-hold circuits
    • D. All of the above
      • Discuss
    • 7. Which type of programming is typically used for digital signal processors?

    • Options
    • A. Assembly language
    • B. Machine language
    • C. C
    • D. None of the above
      • Discuss
    • 8. Which is not an A/D conversion error?

    • Options
    • A. Differential nonlinearity
    • B. Missing code
    • C. Incorrect code
    • D. Offset
      • Discuss
    • 9. Which is a typical application of digital signal processing?

    • Options
    • A. Noise elimination
    • B. Music signal processing
    • C. Image processing
    • D. All of the above
      • Discuss
    • 10. For a 4-bit DAC, the least significant bit (LSB) is ________.

    • Options
    • A. 6.25% of full scale
    • B. 0.625% of full scale
    • C. 12% of full scale
    • D. 1.2% of full scale
      • Discuss

    Comments

    There are no comments.
Enter a new Comment




Aptitude

Engineering

Programming

Reasoning

Links

Copyright ©CuriousTab. All rights reserved.