Find the ideal summing op-amp output shown, in volts to the nearest integer. Inputs are 2 V through 5 kΩ, 2 V through 4 kΩ, 1 V through 2 kΩ; feedback is 10 kΩ and supplies are ±15 V.
The noninverting input is grounded, so the inverting node is virtual ground. Sum input currents: 2/5000+2/4000+1/2000=0.0014 A. Feedback gives Vout=−10000×0.0014=−14 V. This lies inside the supply rails and does not require clipping.
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