Digital circuits miscellaneous

Digital circuits miscellaneous

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Digital Circuits

Digital circuits miscellaneous
  1. The circuit shown in the figure given below Output









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    NA

    Correct Option: A

    NA

  1. The circuit shown in the figure converts








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    All BCD combination can be convert into binary code except 1000 & 1001. Hence best possible answer is (a).

    Correct Option: A

    All BCD combination can be convert into binary code except 1000 & 1001. Hence best possible answer is (a).

  1. The mod-number of the asynchronous counter shown in the figure is








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    It is a 5 bit ripple counter. At 11000, output of NAND gate is LOW. This will clear all FF. So it is a Mod – 24 counter.
    Note that when 11000 occur, the CLR input is activated and all FF are immediately cleared. So it is a MOD 24 counter not MOD 25.

    Correct Option: A

    It is a 5 bit ripple counter. At 11000, output of NAND gate is LOW. This will clear all FF. So it is a Mod – 24 counter.
    Note that when 11000 occur, the CLR input is activated and all FF are immediately cleared. So it is a MOD 24 counter not MOD 25.

  1. The combinational logic circuit shown in the given figure has an output Q which is









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    From the K-map,
    Q = A + B + C

    Correct Option: B

    From the K-map,
    Q = A + B + C

  1. The stable multivibrator shown in the figure has R = 300Ω and C1 = 500 pƒ The pulse width is








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    NA

    Correct Option: B

    NA