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ECE :: Digital Electronics

Digital Electronics - Section 1
Digital Electronics - Section 2
Digital Electronics - Section 3
Digital Electronics - Section 4
Digital Electronics - Section 5
Digital Electronics - Section 6
Digital Electronics - Section 7
Digital Electronics - Section 8
Digital Electronics - Section 9
Digital Electronics - Section 10
Digital Electronics - Section 11
Digital Electronics - Section 12
Digital Electronics - Section 13
Digital Electronics - Section 14
Digital Electronics - Section 15
Digital Electronics - Section 16
Digital Electronics - Section 17
Digital Electronics - Section 18
Digital Electronics - Section 19
Digital Electronics - Section 20
Digital Electronics - Section 21
Digital Electronics - Section 22
Digital Electronics - Section 23
Digital Electronics - Section 24
Digital Electronics - section-25
Digital Electronics - Section-26

  1. Which of the following is the least important consideration while selecting a logic technology?

    2. A.
    Power dissipation
    B.
    Noise immunity
    C.
    Number of pins
    D.
    Cost

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  2. The logic circuit of the given figure realizes the function

    3. A.
    (A + B + C)(D)(E)
    B.
    (A + B + C) (D)(E)
    C.
    (A + B = C) (D)(E)
    D.
    (A + B + C)(D)(E)

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  3. Is Schottky TTL, Schottky diode is used primary to

    4. A.
    prevent saturation of the transistor
    B.
    saturate the transistor
    C.
    act as a switch
    D.
    act as a controlling switch

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  4. What is the maximum output voltage from the 741 op-amp?

    5. A.
    Zero
    B.
    Approximately 1 V
    C.
    Approximately 3 V
    D.
    Approximately 5 V

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  5. A full adder is to be implemented using half adders and OR gates. A 4 bit parallel adder without any initial carry requires

    6. A.
    8 half adders and 4 OR gates
    B.
    8 half adders and 3 OR gates
    C.
    7 half adders and 3 OR gates
    D.
    7 half adders and 4 OR gates

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  6. The main advantage of hexadecimal numbers is

    7. A.
    ease of conversion from hexadecimal to binary and vice-versa
    B.
    ease of conversion from hexadecimal to decimal and vice-versa
    C.
    ease of conversion from gray code to binary and vice-versa
    D.
    the use of numbers and alphabets

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  7. T- FF used as a

    8. A.
    transfer Data switch
    B.
    toggle switch
    C.
    time delay switch
    D.
    none

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  8. A pulse train can be delayed by a finite number of clock periods by using

    9. A.
    serial in-serial out shift register
    B.
    parallel in serial out shift register
    C.
    serial in-parallel out shift register
    D.
    parallel in parallel out shift register

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  9. The disadvantage of counter type ADC as compared to comparator ADC is that

    10. A.
    resolution is low
    B.
    conversion time is more
    C.
    circuit is more complex
    D.
    stability is low

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  10. In 8421 Binary coded Decimal system the decimal number 237 is represented by

    11. A.
    1000110111
    B.
    1000111110
    C.
    001000110111
    D.
    10010010011

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