Measure INL / DNL / SFDR in Spectre

Discussion in 'Cadence' started by curious, Oct 29, 2004.

  1. curious

    curious Guest

    Hi,

    I am a student and I would like to find out how to
    measure INL / DNL /SFDR for a simple DAC using Cadence.

    thanks
    SIQU
     
    curious, Oct 29, 2004
    #1
  2. curious

    curious Guest

    Hi,

    Wonder can anyone advise ?
    1) I have used the following calculations to measure the fundamental
    but not sure how to obtain the harmonics to determine the Spurious free
    dynamic response.

    (ymax(dB20(dft((VT("/DAC_output"))) 26 52 2048
    "Rectangular" 1 1)))

    2) I have also used another approach - using the Fourier component
    in the analoglib with a single sin tone but output is questionable.
    -measure i/p: sin tone from DAC output
    -ref i/p: sin tone

    rgds
    SIQU
     
    curious, Oct 31, 2004
    #2
  3. curious

    oghdayan Guest

    what about a pss analysis?
     
    oghdayan, Oct 31, 2004
    #3
  4. curious

    curious Guest

    Thanks. I found the problem.
    It seems silly - I need to use the current meter
    to plot & measure rather than just selecting the node or net.


    rgds
    SIQU
     
    curious, Nov 2, 2004
    #4
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