Summing Circuit using OpAmp

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The circuit uses a small resistor network of just a feedback resistor and resistors for the input signals. The output is the summation of the contribution from signal 1 (orange) and signal 2 (green).

The blue output voltage is represented as Vo = - V1 * ( Rf / R1 )   - V2 * ( Rf / R2 ).

Changing the value of the feedback resistor Rf can change the total output, while varying the input resistors can affect each inputs total contribution to the output.

published 2 years ago

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