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ECE :: Digital Electronics

  1. The number of memory locations in which 14 address bits can access is

  2. A.
    1024
    B.
    2048
    C.
    4096
    D.
    16384

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  3. What will be conversion rate for a counter type A/D converter contains a 4 bit binary ladder and a counter driven by a 2 MHz clock. Then conversion time

  4. A.
    125
    B.
    125 x 103
    C.
    125 x 106
    D.
    None

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  5. A 6 bit R-2R ladder D/A converter has a reference voltage of 6.5 V. It meets standard linearity then resolution in percent and volts.

  6. A.
    3% 7 V
    B.
    6.4 V, 2%
    C.
    0.1%, 1.57 V
    D.
    1.57%, 0.1 V

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  7. What will be output for decimal input 82?

  8. A.
    0.82 V
    B.
    8 V
    C.
    0.1 V
    D.
    10 mV

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  9. The circuit of the given figure gives the output Y =

  10. A.
    AB
    B.
    A + B
    C.
    A B
    D.
    A + B

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  11. In a 4 bit ripple counter using flip flops with tpd = 40 ns, the maximum frequency can be

  12. A.
    1.25 MHz
    B.
    3.25 MHz
    C.
    6.25 MHz
    D.
    12.5 MHz

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  13. The number of product terms in the minimized sum of product expression obtained through the following K-map, where d, don't care.

  14. A.
    2
    B.
    3
    C.
    4
    D.
    5

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  15. BCD equivalent of - 810 is

  16. A.
    00110
    B.
    10110
    C.
    11000
    D.
    01000

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  17. The number of inputs and outputs in a full adder are

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

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  19. A + A . B =

  20. A.
    B
    B.
    A . B
    C.
    A
    D.
    A or B

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