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  • Question
  • The fixed count that should be used so that the output register will represent the input for a 6 bit dual slope A/D converter uses a reference of -6v and a 1 MHz clock. It uses a fixed count of 40 (101000).


  • Options
  • A. 000110
  • B. 0010
  • C. 1111
  • D. 011101

  • Correct Answer
  • 000110 

    Explanation
    If The fixed count that should be used so that the output register will represent the input for a 6 bit is made to be unity, the O/P count N2 = ei, N1 = 6 = 000110.

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    • 1. An AND gate has two inputs A and B and one inhibit input 3, Output is 1 if

    • Options
    • A. A = 1, B = 1, S = 1
    • B. A = 1, B = 1, S = 0
    • C. A = 1, B = 0, S = 1
    • D. A = 1, B = 0, S = 0
    • Discuss
    • 2. The resolution of an n bit DAC with a maximum input of 5 V is 5 mV. The value of n is

    • Options
    • A. 8
    • B. 9
    • C. 10
    • D. 11
    • Discuss
    • 3. A ring counter with 5 flip flops will have

    • Options
    • A. 5 states
    • B. 10 states
    • C. 32 states
    • D. infinite states
    • Discuss
    • 4. For the minterm designation Y = ? m (1, 3, 5, 7) the complete expression is

    • Options
    • A. Y = A BC + A B C
    • B. Y = A B C + A B C + ABC + A BC
    • C. Y = A B C + A B C + ABC + A BC
    • D. Y = A B C + ABC + A BC + A BC
    • Discuss
    • 5. The greatest negative number which can be stored is 8 bit computer using 2's complement arithmetic is

    • Options
    • A. - 256
    • B. - 128
    • C. - 255
    • D. - 127
    • Discuss
    • 6. The output of a half adder is

    • Options
    • A. SUM
    • B. CARRY
    • C. SUM and CARRY
    • D. none of the above
    • Discuss
    • 7. A JK flip flop has tpd= 12 ns. The largest modulus of a ripple counter using these flip flops and operating at 10 MHz is

    • Options
    • A. 16
    • B. 64
    • C. 128
    • D. 256
    • Discuss
    • 8. Maxterm designation for A + B + C is

    • Options
    • A. M0
    • B. M1
    • C. M3
    • D. M4
    • Discuss
    • 9. In the expression A + BC, the total number of minterms will be

    • Options
    • A. 2
    • B. 3
    • C. 4
    • D. 5
    • Discuss
    • 10. A carry look ahead adder is frequently used for addition because

    • Options
    • A. it costs less
    • B. it is faster
    • C. it is more accurate
    • D. is uses fewer gates
    • Discuss


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