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Discussion :: Digital Electronics

  1. 4 bit ripple counter and 4 bit synchronous counter are made using flip-flop having a propagation delay of 10 ns each. If the worst case delay in the ripple counter and the synchronous counter be R and S respectively, then

    2. A.
    R = 10 ns, S = 40 ns
    B.
    R = 40 ns, S = 10 ns
    C.
    R = 10 ns, S = 30 ns
    D.
    R = 30 ns, S = 10 ns

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    Answer : Option B

    Explanation :

    In synchronous counter time delay is constant while in Ripple it is additive.

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