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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. The circuit given below is a

    2. A.
    counter
    B.
    digital to analog converter
    C.
    two-bit series-to-parallel converter
    D.
    analog-to digital converter

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  2. A 7477 decoder drives

    3. A.
    seven-segment display
    B.
    nickel tape
    C.
    relays
    D.
    diode matrix

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  3. BCD numbers are useful whenever

    4. A.
    binary to hexadecimal conversion is desired
    B.
    binary to BCD conversion is desired
    C.
    decimal information is transferred into or out of a digital system
    D.
    none of the above

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  4. In 8085 microprocessor, what is the length of Data Buffer Register?

    5. A.
    6 bits
    B.
    8 bits
    C.
    12 bits
    D.
    16 bits

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  5. In JK flip flop toggle state exists if

    6. A.
    J = 0, K = 1
    B.
    J = 1, K = 0
    C.
    J = 0, K = 0
    D.
    J = 1, K = 1

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  6. The binary number 101100.110 in octal number will be

    7. A.
    152.6
    B.
    154.6
    C.
    145.6
    D.
    174.6

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  7. Thu advantage of using a dual stop ADC in a digital voltmeter is that

    8. A.
    its conversion time is small
    B.
    its accuracy high
    C.
    output is in BCD format
    D.
    it does not require a comparator

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  8. Which converters uses integrating op-amp?

    9. A.
    Parallel A/D converter
    B.
    Single slope A/D converter
    C.
    Dual slope A/D converter
    D.
    Both (b) and (c)

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  9. While __________ is the fastest unsaturated logic gate __________ has the excellent noise immunity?

    10. A.
    ECL, TTL
    B.
    TTL, ECL
    C.
    ECL, RTL
    D.
    RTL, DTL

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  10. In a 4 bit D/A converter, the offset error is the output voltage when input digital voltage is

    11. A.
    1111
    B.
    0000
    C.
    either 1111 or 0000
    D.
    none of the above

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