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How do you find Carrier Amplitude for given AM wave signal

Discussion in 'General Electronics' started by sam, Apr 30, 2004.

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  1. sam

    sam Guest

    hi i am tryig to calculte this
    y1(t) = A(1+mcos(2pi5000t))cos (2pi80000t)

    and have to find minimum value of A when y1(t) is greater than or
    equal to .2V for all t
    how do you find that i have simplified that equation using trig
    iden...but still not sure how to find that A
    please help
    thank u
     
  2. iQbal

    iQbal Guest

    Cosine will not exceed +/- 1
    Sine will not exceed +/- 1
    Therefore
    the positive peak would be +A + Am = A(1+m);
    The neagtive peak would be be -A(1+m);

    iQbal
     
  3. Bob Stephens

    Bob Stephens Guest

    And thank the nice man for doing your homework.
     
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