📐 dB Gain Formulas
Power Gain (dB) = 10 × log₁₀(P_out/P_in)
Voltage Gain (dB) = 20 × log₁₀(V_out/V_in)
Current Gain (dB) = 20 × log₁₀(I_out/I_in)
Total Gain = G₁ + G₂ + G₃ + ...
P = power, V = voltage, I = current, G = gain in dB
Gain:
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Ratio:
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Multiplier:
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Description:
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💡 Tips & Information
- Positive dB = amplification, negative dB = attenuation
- 3 dB = 2× power, 6 dB = 4× power, 10 dB = 10× power
- 20 dB = 10× voltage/current, 40 dB = 100× voltage/current
- Cascade gains add linearly in dB
- Common in audio, RF, and signal processing