logo

CuriousTab

CuriousTab

Discussion

Home ‣ Digital Electronics ‣ MSI Logic Circuits See What Others Are Saying!
  • Question

  • A breadboard-circuit design using a BCD-to-decimal decoder has a problem wherein the operation of the system is erratic. The technician uses his scope to examine the waveforms throughout the system and doesn't really see any problems. While he's scratching his head, what helpful advice can you offer him as to what might be wrong and what to do to correct the problem?


  • Options
  • A. The decoder is thermally intermittent; replace it.
  • B. There is probably a bad connection on the wire wrap protoboard; recheck the wiring.
  • C. Glitches are probably the culprit; strobe the decoder.
  • D. The decoder is thermally intermittent and must be replaced; or there is probably a bad connection on the wire wrap protoboard, and the wiring must be rechecked.

  • Correct Answer
  • Glitches are probably the culprit; strobe the decoder. 

    • More questions

    • 1. PALs tend to execute ________ logic.

    • Options
    • A. SAP
    • B. SOP
    • C. PLA
    • D. SPD
      • Discuss
    • 2. 34FC + AD31 = ________.

    • Options
    • A. E22D
    • B. E31D
    • C. E21D
    • D. E42D
      • Discuss
    • 3. A decimal 11 in BCD is ________.

    • Options
    • A. 00001011
    • B. 00001100
    • C. 00010001
    • D. 00010010
      • Discuss
    • 4. Convert the following BCD number to decimal.
      010101101001bcd

    • Options
    • A. 539
    • B. 2551
    • C. 569
    • D. 1552
      • Discuss
    • 5. Parallel transmission is faster than serial.

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. The complement of 1 is 0.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. Digital signal processing must be at least half as fast as the incoming signal to be processed.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. In the keypad HDL encoder, NANDing of the columns is used to activate the freeze bit.

    • Options
    • A. True
    • B. False
      • Discuss
    • 9. Resolution in the analog output of a DAC is primarily dependent on the number of input binary bits.

    • Options
    • A. True
    • B. False
      • Discuss
    • 10. The carry-out of a binary adder is identified using the summation symbol, sigma.

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

    Comments

    There are no comments.
Enter a new Comment




Aptitude

Engineering

Programming

Reasoning

Links

Copyright ©CuriousTab. All rights reserved.