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Discussion :: Communication Systems

  1. The minimum step size required for a Delta modulator operating at 36 samples/sec to track the signal (here u(t) is the unit step function) x(t) = 125t (u(t) - u(t - 1)) + (250 - 125t) (u(t - 1) - u(t - 2)) So that slope overload is avoided, would be

  2. A.
    2-10
    B.
    2-8
    C.
    2-6
    D.
    2-4

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    Answer : Option B

    Explanation :

    To avoid slope overload

    |m(t)| ≥ Δ . fs or |x(t)| ≥ Δ . fs

    125 ≤ Δ . 25 . 210

    27 ≤ Δ . 215 Δ ≥ 2-8.


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