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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. In a 4 bit counter the output of 3 JK FFs from MSB downward are connected to the NAND gate whose O/P is connected to CLR

    2. A.
    it is a MOD-14 counter
    B.
    it is MOD-13 counter
    C.
    it is divided by 13 counter
    D.
    it is divide by 10 counter

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  2. For checking the parity of a digital word, it is preferable to use

    3. A.
    AND gates
    B.
    NAND gates
    C.
    EX-OR gates
    D.
    NOR gates

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  3. Among the digital IC families - ECL, TTL, and CMOS

    4. A.
    ECL has the least propagation delay
    B.
    TTL has largest fan out
    C.
    CMOS has the lowest noise margin
    D.
    TTL has the lowest power consumption

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  4. In ASCII, letter B is coded as

    5. A.
    1000001
    B.
    1000010
    C.
    100100
    D.
    1001000

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  5. The power dissipated per gate

    6. A.
    is constant at all frequencies
    B.
    increases with frequency
    C.
    decreases with frequency
    D.
    may increase or decrease with frequency

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  6. In 8085 microprocessor, what is the memory word addressing capability?

    7. A.
    32 K
    B.
    64 K
    C.
    256 K
    D.
    512 K

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  7. Gray code is used in devices which convert analog quantities to digital signal because it is

    8. A.
    more error free
    B.
    much simpler than binary code
    C.
    superior to Excess-3 code
    D.
    absolutely error free

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  8. A transistor is operated as non-saturated switch to eliminate

    9. A.
    turn on time
    B.
    turn off time
    C.
    storage time
    D.
    delay time

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  9. Which has the lowest propagation delay time?

    10. A.
    ECL
    B.
    TTL
    C.
    CMOS
    D.
    PMOS

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  10. Programmable logic array uses

    11. A.
    RAM matrices
    B.
    ROMs matrices
    C.
    PROM matrices
    D.
    Silo memory

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