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Non Inverting summing amplifier

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naspek

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Hey there...
i've got question on how to derive the expression for the output voltage
of non inverting summing amplifier...?
i did search on the other website.. but.. they didnt show the step by step
derivation...

i know that
Vo = 1/n (V1 + V2 ... +Vn)(Rf/R1 + 1)

but.. how to get it step by step? apply KCL? VDR?
 

well the formula that you have written is a special case when the resistors in series with V1, V2 source are equal.

I have tried to explain the possible solution in the attached document but please verify it with seniors.
 

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    naspek

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