Calculation formula help request; 20 gain is equivalent to how many decibles??? - diyAudio
 Calculation formula help request; 20 gain is equivalent to how many decibles???
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 Chip Amps Amplifiers based on integrated circuits

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 26th February 2005, 08:10 AM #1 diyAudio Member   Join Date: Jan 2005 Location: Michigan Calculation formula help request; 20 gain is equivalent to how many decibles??? Hello, I am a newby at opamp building and am making my first pocket chip mic preamp. I already have the resistors to set it at 20 gain. However, how does this translate into decibles? I would like to finally finish this first chip project but am totally lost. The usual websearches were done but I could not find the formula that converts "X" gain = "X" decibles. I feel like a goof! Please help!!!! Fustraited, Darren __________________ Darren
 26th February 2005, 08:55 AM #2 diyAudio Member     Join Date: Nov 2003 Location: Klepp
 26th February 2005, 09:07 AM #3 diyAudio Member     Join Date: Dec 2002 Location: greece voltage gain in dB: D=20log(Uout/Uin) power gain in dB: D=10log(Pout/Pin) current gain in dB: D=20log(Iout/Iin) for your occasion: D=20log(20)=26dB voltage gain __________________ i am currently using 60,000 uF of capacitance in my preamplifier..

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