Phase Error Interpretation

Discussion in 'General Electronics Chat' started by lkgan, Feb 5, 2010.

  1. lkgan

    Thread Starter Member

    Dec 18, 2009
    117
    0
    Hi everyone,

    From the attached picture, it's showing that phase error is output from the Phase Frequency Detector of a PLL. Can anyone please explain to me how the second waveform was obtained from the first pulse waveform? I can't see the relationship between them. Thanks.....
     
    Last edited: Feb 5, 2010
  2. russ_hensel

    Well-Known Member

    Jan 11, 2009
    818
    47
    A phase error is an error between 2 waves, I see only 1 wave plus a graph of the error. I think one wave is missing. Could be wrong on this.
     
  3. lkgan

    Thread Starter Member

    Dec 18, 2009
    117
    0
    Alright, attachment was updated. It's a waveform around an accumulator. ref(t) is reference clock and div(t) is the output of the accumulator. The e(t) is the phase difference between div(t) and ref(t). How about the phase error(t) was being derived?
     
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