Summing amplifier using OPAM
In this article I will throw some light on Summing amplifier using OPAM. An OPAM i.e. Operational Amplifier can be used to perform mathematical operations such as addition, subtraction, differential amplifier, integrator, etc. In this article we will see how OPAM can be used as addition or summing amplifier.
Here, as we have used the OPAM in close loop configuration, we will assume that there is negligible voltage difference between inverting input and non inverting input. So for calculations Voltage at PIN2 = 0.
Here I1, I2, I3 are three inputs, with resistance R1, R2, R3. Current in these three wires will be:
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