logo

CuriousTab

CuriousTab

Discussion


Home Digital Electronics Digital Concepts See What Others Are Saying!
  • Question
  • The rise time is the time it takes a pulse to go from ________.


  • Options
  • A. the base line to the maximum HIGH voltage
  • B. 10% of the pulse amplitude to the maximum HIGH voltage
  • C. the base line to 90% of the pulse amplitude
  • D. 10% of the pulse amplitude to 90% of the pulse amplitude

  • Correct Answer
  • 10% of the pulse amplitude to 90% of the pulse amplitude 


  • More questions

    • 1. With an OR gate, the output is HIGH only when both inputs are HIGH.

    • Options
    • A. True
    • B. False
    • Discuss
    • 2. Which format requires fewer conductors?

    • Options
    • A. Parallel
    • B. Serial
    • C. Both are the same
    • D. Cannot tell
    • Discuss
    • 3. ________ is the output frequency of the counter shown below.


    • Options
    • A. 4 MHz
    • B. 20 kHz
    • C. 210.5 kHz
    • D. 800 Hz
    • Discuss
    • 4. A good example of the use of a digital representation of an analog quantity is the audio recording of music.

    • Options
    • A. True
    • B. False
    • Discuss
    • 5. Which of the following RAM timing parameters determine its operating speed?

    • Options
    • A. tACC
    • B. tAA and tACS
    • C. tCO and tOD
    • D. tRC and tWC
    • Discuss
    • 6. Typically, how often is DRAM refreshed?

    • Options
    • A. 2 to 8 ms
    • B. 4 to 16 ms
    • C. 8 to 16 µs
    • D. 1 to 2 µs
    • Discuss
    • 7. The architecture of a PAL differs slightly from that of a PROM.

    • Options
    • A. True
    • B. False
    • Discuss
    • 8. CCD stands for ________.

    • Options
    • A. capacitor charging device
    • B. capacitor-capacitor drain
    • C. charged-capacitor device
    • D. charge-coupled device
    • Discuss
    • 9. Dynamic memories, such as the 2118 16K × 1 RAM, have to multiplex the address bus.

    • Options
    • A. True
    • B. False
    • Discuss
    • 10. The total amount of external code memory that can be interfaced to the 8051 is:

    • Options
    • A. 32K
    • B. 64K
    • C. 128K
    • D. 256K
    • Discuss


    Comments

    There are no comments.

Enter a new Comment