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Math Help - electronic amplification

  1. #1
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    electronic amplification

    Does anyone know how to calculate the overall gain in dB,

    example, something like

    10dB, 15dB, -8dB, respectively, calculate overall gain in dB

    Also, if you know an amplifiers voltage gain, how do you calculate its gain in dB's

    Thanks anyone who knows this stuff.
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  2. #2
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    Sep 2007
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    Quote Originally Posted by bobchiba View Post
    Does anyone know how to calculate the overall gain in dB,

    example, something like

    10dB, 15dB, -8dB, respectively, calculate overall gain in dB

    Also, if you know an amplifiers voltage gain, how do you calculate its gain in dB's

    Thanks anyone who knows this stuff.
    OK assuming the overall gain is for a multi-amplifier stage with those respective gains in dB. You simply add the dB values. So you get 17dB.

    To get gain in dB from Voltage gain do:-

    Gain (dB) = 20 log (base 10) (Av) where Av is the voltage gain.
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