How to compute 1/f noise corner

Discussion in 'Cadence' started by pureck, May 5, 2006.

  1. pureck

    pureck Guest

    Hi

    I've been looking for a spectre expression to automatically calculate
    1/f noise corner at where thermal noise and 1/f noise meet after
    running pss and pnoise.
    Are there anyone have done this?
    Thanks
     
    pureck, May 5, 2006
    #1
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  2. pureck

    Belal Guest

    Hi,

    I use this calculator expression in the outputs:

    xmin((phaseNoise(1 "pss-fd.pss" ?result "pnoise-pnoise") + (25 *
    log10(xval(phaseNoise(1 "pss-fd.pss" ?result "pnoise-pnoise"))))))

    If you are interested, I can write up the derivation for it .
    Basically it finds the point of equal contribution to phase noise from
    1/f and thermal noise, which is the corner frequency as I understand
    it.

    Belal
     
    Belal, May 7, 2006
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  3. pureck

    Richard

    Joined:
    Sep 10, 2017
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    Hi Belal.

    Yes, I'd like to know how did you derive this. Could you also post your derivation? Thank you very much!

    Best,
    Richard

     
    Richard, Sep 10, 2017
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