Is it possible to realize a adder with single supply opamp?

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tebron

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The op adder.

hi,
Is it possible to realize a adder circuit with an single supply operational?
Can I to adder the signals on the non inverting input?
Anyone has an idea?
thanks.
 

add with resistive divider

If the voltages come from stiff sources you can combine them with two resistors to a floating point. The output will be a scaled sum of the two. Then put that point ot the noninverting input of an op amp in the noninverting configruation.
 

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