[sdiy] Dumb math question

[Scott Gravenhorst]

If we're talking about an OpAmp summing circuit, which is
standard, and the gain of the circuit is set to 1/3  (as in
an OpAmp gain of 1 with an attenuator of 1/3) then the output
will be (Ia+Ib+Ic)/3, where Ia, Ib and Ic are the input
currents for each input a, b and c.

jbv <jbv.silences at club-internet.fr> wrote:
>Consider a 3 inputs mixer built around an op-amp,
>with a gain attenuation by a factor of 3.
>Can the output be considered as the average of the
>inputs, like in maths one can calculate the average
>of 3 values ?
>
>Thanks,
>JB
>
>

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