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- Thread starter phiby
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I like Serena

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The Bode plot shows the power gain in dB.

Power is correlated to the square of the amplitude.

Since amplitude is used as input, you get an extra factor 2.

In formula form:

[tex]P \propto A^2[/tex]

[tex]10 \cdot \log {P \over P_0} = 10 \cdot \log {A^2 \over A_0^2} = 20 \cdot \log {A \over A_0}[/tex]

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