Explain working of inverting summing amplifier, Electrical Engineering

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Q. Explain working of Inverting Summing Amplifier?

The circuit of Figure is extended by adding other input points, as shown in Figure. Because of the virtual ground at terminal 1 (ideal op-amp assumption), the response of the circuit to any one input is not affected by the presence of the other N - 1 inputs. Based on Equation one can write the total output as the sum of all responses,

921_Explain working of Inverting Summing Amplifier.png

If all resistors R are the same, say R = R , for all n, then

543_Explain working of Inverting Summing Amplifier1.png

which corresponds to an inverting summing amplifier with gain.


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