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Discussion :: Digital Electronics

  1. The circuit in the given figure is

    2. A.
    positive logic XOR gate
    B.
    negative logic OR gate
    C.
    negative logic AND gate
    D.
    positive logic AND gate

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    Answer : Option C

    Explanation :

    Since V(I) is lower state than V(0) it is a negative logic circuit. Since diodes are in reversed parallel, it is an AND gate.

    Note: In Boolean algebra it is recognized that a positive logic OR is a negative logic AND. Similarly a positive logic AND is a negative logic OR.

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