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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. Consider the following statements

    1. ECL has least propagation delay
    2. TTL has largest fan out
    3. CMOS has highest noise margin
    4. TTL has lowest power dissipation
    Which of these are correct?

    2. A.
    1 and 3
    B.
    2 and 4
    C.
    3 and 4
    D.
    1 and 2

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  2. In Schottky TTL, a Schottky diode is used for

    3. A.
    forming the gate
    B.
    connecting the resistor
    C.
    clamping of the basic collector junction
    D.
    none of the above

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  3. The circuit of the given figure is

    4. A.
    full adder
    B.
    magnitude comparator
    C.
    parity detector
    D.
    none of the above

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  4. Which of the following ICs has only one NAND gate?

    5. A.
    7410
    B.
    7420
    C.
    7430
    D.
    7447

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  5. A mod-10 counter can divide the clock frequency by a factor of

    6. A.
    10
    B.
    20
    C.
    210
    D.
    102

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  6. In a digital circuit, a clock is a

    7. A.
    crystal type
    B.
    multivibrator
    C.
    flip-flop
    D.
    free running multivibrator

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  7. In a RS flip-flop no change occurs during

    8. A.
    prohibited mode
    B.
    set mode
    C.
    reset mode
    D.
    disable mode

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  8. Out of multiplexer and demultiplexer, which can be used as a logic function generator?

    9. A.
    Multiplexer only
    B.
    Demultiplexer only
    C.
    Both
    D.
    None

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  9. Binary 1000 will be the result of which of the following?

    10. A.
    Binary 1000 - 100
    B.
    Binary 1011 - 1111
    C.
    Binary 1111 - 111
    D.
    Binary 11111 - 1111

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  10. In a programmable counter

    11. A.
    the starting number for counting can be programmed
    B.
    the modulus can be programmed
    C.
    both the starting number and modulus can be programmed
    D.
    either the starting number or modulus can be programmed

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