[sdiy] The TL072

Antti Huovilainen ajhuovil at cc.hut.fi
Fri Feb 20 19:59:43 CET 2009

On Fri, 20 Feb 2009, Ingo Debus wrote:

> I once replaced the opamp in the summing amp in my DIY 12 input mixer (5534 
> vs TL072) and got noticably less noise. The summing amp has a gain of only 1 
> for each input, but with 12 inputs the noise gain is 13.

Do you mean sqrt(13)? (the noise inputs are not correlated and hence you 
need to add the power, not voltage)


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   -- Lt. Cmdr. Ivanova

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