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Home ‣ Digital Electronics ‣ Interfacing to the Analog World See What Others Are Saying!
  • Question

  • The basic approach to testing D/A converters is to:


  • Options
  • A. apply a sequence of binary codes covering the full range of input values to the circuit input while observing the output on an oscilloscope. The output should consist of a linear stairstep ramp.
  • B. single-step the device through its full input range while checking the output with a DMM.
  • C. check the output with zero input and then full input. The output of the converter should extend from zero to its maximum value. If so, then everything in between can be assumed to be operating properly.
  • D. apply the correct input to the analog terminal and then check to see if the proper binary code exists on the digital inputs.

  • Correct Answer
  • apply a sequence of binary codes covering the full range of input values to the circuit input while observing the output on an oscilloscope. The output should consist of a linear stairstep ramp. 

    • More questions

    • 1. All inputs to the MAX7000S device and all macrocell outputs feed the PIA.

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. The 74154 is a 1-of-16 decoder. It accepts a 4-bit binary input.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. A 1-of-8 octal decoder has eight outputs and decodes an input of ________ bit(s).

    • Options
    • A. three
    • B. two
    • C. four
    • D. one
      • Discuss
    • 4. A four-line multiplexer must have as inputs four data inputs and two select inputs.

    • Options
    • A. True
    • B. False
      • Discuss
    • 5. Basically, a multiplexer changes parallel data inputs to a serial output.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. In a positive logic system, the HIGH level is usually represented by ________.

    • Options
    • A. 0 V
    • B. +1 V
    • C. +5 V
    • D. +9 V
      • Discuss
    • 7. Eight bits of digital data are normally referred to as a:

    • Options
    • A. group.
    • B. byte.
    • C. word.
    • D. cell.
      • Discuss
    • 8. The JTAG signals are named TDI, TDO, TMS, and TCK.

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. The exclusive-OR provides a LOW input if one input or the other input is HIGH.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. A burst refresh and a normal memory operation of a DRAM can be interspersed.

    • Options
    • A. True
    • B. False
      • Discuss

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