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Home Digital Electronics Digital System Projects Using HDL Comments

  • Question
  • In the frequency counter, what is the function of the Schmitt trigger circuit?


  • Options
  • A. To reduce input noise
  • B. To condition the input signal
  • C. To convert non-square waveforms
  • D. To provide a usable signal to the display unit

  • Correct Answer
  • To convert non-square waveforms 


  • Digital System Projects Using HDL problems


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    • 1. In the digital clock project, the purpose of the frequency prescaler is to:

    • Options
    • A. find the basic frequency.
    • B. transform a 60 pps input to a 1 pps timing signal.
    • C. prevent the clock from exceeding 12:59:59.
    • D. allow the BCD display to have a value from 00?59.
    • Discuss
    • 2. Which is not a major block of an HDL frequency counter?

    • Options
    • A. Display register
    • B. Decoder/display
    • C. Timing and control unit
    • D. Bit shifter
    • Discuss
    • 3. The accuracy of the frequency counter depends on the:

    • Options
    • A. system clock frequency.
    • B. number of displayed digits.
    • C. sampling rate.
    • D. display update rate.
    • Discuss
    • 4. Why should a real hardware functional test be performed on the HDL stepper motor design?

    • Options
    • A. To check the speed of the software
    • B. To check the current levels in the motor
    • C. To check the voltage levels of the real outputs
    • D. To provide a fully operational system
    • Discuss
    • 5. What does the major block of an HDL code emulation of a keypad include?

    • Options
    • A. A sequencer
    • B. A clock
    • C. A multiplexer
    • D. A ring counter
    • Discuss
    • 6. In a digital clock application, the basic frequency must be divided down to:

    • Options
    • A. 1 Hz.
    • B. 60 Hz.
    • C. 100 Hz.
    • D. 1000 Hz.
    • Discuss
    • 7. Which is not a step used to define the scope of an HDL project?

    • Options
    • A. Are the inputs and outputs active HIGH or active LOW?
    • B. A clear vision of how to make each block work
    • C. What are the speed requirements?
    • D. How many bits of data are needed?
    • Discuss
    • 8. In the frequency counter, when is the new count stored in the display register?

    • Options
    • A. After disabling the counter
    • B. When the count buffer is full
    • C. After the sample interval is set
    • D. When the timing and control block has put it there
    • Discuss
    • 9. In the digital clock project, what is the frequency of the MOD-6 counter in the minutes section?

    • Options
    • A. 1 pulse per minute
    • B. 6 pulses per minute
    • C. 10 pulses per minute
    • D. 1 pulse per hour
    • Discuss
    • 10. In the frequency counter, if the clock generator produces a 100 kHz system clock signal, how many decade counters are required to measure 1 Hz?

    • Options
    • A. 6
    • B. 5
    • C. 4
    • D. 3
    • Discuss


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