Advanced Microprocessors

Advanced Microprocessors

Easy Questions

Microprocessor

8085 Microprocessors
Advanced Microprocessors
  1. The number of comparator carried out in a 4 bit flashtype A/D converter is—








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    No. of comparator required = 2n – 1
    (where, n = no. of bits)
    = 24 – 1 = 15
    Hence alternative (B) is the correct answer.

    Correct Option: B

    No. of comparator required = 2n – 1
    (where, n = no. of bits)
    = 24 – 1 = 15
    Hence alternative (B) is the correct answer.

  1. Among the following the slowest ADC is—








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    Integrating type ADC are more accurate but slow.

    Correct Option: C

    Integrating type ADC are more accurate but slow.

  1. Which of the following is D to A conversion technique?








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    Among the given, weighted resistor technique is only D to A conversion technique.

    Correct Option: B

    Among the given, weighted resistor technique is only D to A conversion technique.

  1. For an input pulse train of clock period T, the delay produced by an n stage shift register—








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    nT, Because in the case of shift register all the flipflops are connected in cascaded fashion.

    Correct Option: B

    nT, Because in the case of shift register all the flipflops are connected in cascaded fashion.

  1. Which of the following condition must be met to avoid race around problem where, tp is propagation delay of the NAND gate, Δt is pulse width and T is period of pulse train?








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    Condition to avoid race around problem:

    where, Δt = Pulse width
    T = Period of pulse
    2tp = Propagation delay of two NAND gates or flip-flop.
    It may be noted that tp is the propagation delay of one gate. However any flip-flop made up of 4 NAND gates or NOR gates, and any input passes through 2 gates, that's why here we must take 2tp propagation delay.

    Correct Option: B

    Condition to avoid race around problem:

    where, Δt = Pulse width
    T = Period of pulse
    2tp = Propagation delay of two NAND gates or flip-flop.
    It may be noted that tp is the propagation delay of one gate. However any flip-flop made up of 4 NAND gates or NOR gates, and any input passes through 2 gates, that's why here we must take 2tp propagation delay.