logo

CuriousTab

CuriousTab

Digital Signal Processing problems

  • 1. A binary-weighted-input digital-to-analog converter has a feedback resistor, Rf, of 12 kΩ. If 50 µA of current is through the resistor, voltage out of the circuit is ________.

  • Options
  • A. 0.6 V
  • B. ?0.6 V
  • C. 0.1 V
  • D. ?0.1 V
    • Discuss
  • 2. An op-amp has very ________.

  • Options
  • A. high voltage gain
  • B. high input impedance
  • C. low output impedance
  • D. all of the above
    • Discuss
  • 3. In a digital reproduction of an analog curve, accuracy can be increased by ________.

  • Options
  • A. sampling the curve more often
  • B. sampling the curve less often
  • C. decreasing the number of bits used to represent each sampled value
  • D. all of the above
    • Discuss
  • 4. 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
  • 5. 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
  • 6. 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
  • 7. The resolution of a 6-bit DAC is ________.

  • Options
  • A. 63%
  • B. 64%
  • C. 15.9%
  • D. 1.59%
    • Discuss
  • 8. If a DAC has a full-scale, or maximum, output of 12 V and accuracy of Digital Electronics Digital Signal Processing: If a DAC has a full-scale, or maximum, output of 12 V and accuracy of0.1%, then the maximum error for any output voltage is ________.

  • Options
  • A. 12 V
  • B. 120 mV
  • C. 12 mV
  • D. 0 V
    • Discuss
  • 9. 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
    • Discuss
  • 10. 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

First 2 3 4 5

Aptitude

Engineering

Programming

Reasoning

Links

Copyright ©CuriousTab. All rights reserved.