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Discussion :: Digital Electronics

  1. The counter shown in the given figure is built using 4 -ve edge triggered toggle FFs. The FF can be set asynchronously when R = 0. The combinational logic required to realize a modulo-13 counter is

  2. A.
    F = Q4 Q3 Q2 Q1
    B.
    F = Q4 + Q3 + Q2 + Q1
    C.
    F = Q4 + Q3 + Q2 + Q1
    D.
    F = Q4Q3Q2Q1

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    Answer : Option A

    Explanation :

    Counter is modulo-13, it will count up to 15 but due to mod-13, it will be reset at 13, (13)10 = (1101 )2 = Q4 Q3 Q2 Q1.


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