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  • Question
  • An op-amp has very ________.


  • Options
  • A. high voltage gain
  • B. high input impedance
  • C. low output impedance
  • D. all of the above

  • Correct Answer
  • all of the above 


  • Digital Signal Processing problems


    Search Results


    • 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. In the keypad application, just after the 4 ms mark the simulation imitates the release of the key by changing the column value back to F hex, which causes the d output to go into its Hi-Z state. On the next rising clock edge, what happens to dav?

    • Options
    • A. It goes HIGH.
    • B. It goes LOW.
    • C. It goes to Hi-Z.
    • D. It goes to 1111H.
    • Discuss
    • 3. In a frequency counter, what happens at high frequencies when the sampling interval is too long?

    • Options
    • A. The counter works fine.
    • B. The counter undercounts the frequency.
    • C. The measurement is less precise.
    • D. The counter overflows.
    • Discuss
    • 4. Which is not a step in strategic planning for HDL development?

    • Options
    • A. There must be a way to test each piece.
    • B. Each block must fit together to make up the whole system.
    • C. The names of each input and output must be known.
    • D. The exact operation of each block must be thoroughly defined and understood.
    • Discuss
    • 5. In the digital clock project, when does the PM indicator go high?

    • Options
    • A. Never
    • B. Going from 11:59:59 to 12:00:00
    • C. Going from 12:59:59 to 01:00:00
    • D. On the falling edge of the clock after enable goes high
    • Discuss
    • 6. 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
    • 7. 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
    • 8. 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
    • 9. 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
    • 10. The resolution of a 6-bit DAC is ________.

    • Options
    • A. 63%
    • B. 64%
    • C. 15.9%
    • D. 1.59%
    • Discuss


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