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Converting Decibels (Db) to Signal to Noise (S/N)

Discussion in 'Beginner Electronics' started by KP, Nov 17, 2003.

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  1. KP

    KP Guest

    Hi All

    I am abit stuck on converting a number in decibels (Db) to signal/noise

    I know the equation for converting into DB: -

    SN (Db) = 10 Log [Signal Power / Noise Power]

    The way which I have managed to conver the Decibel to S/N is using the
    following formula: -

    Inverse Log [XXXX db / 10]

    So using the above formula, 30 Db will work out to be 1000 s/n which is

    The problem is, explaining how I got this formula. Any ideas or better ways
    of working this out would be appreciated.


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