Instrumentation amplifier — Free Electronics Illustration

Electronics

Instrumentation amplifier

Clean black-and-white textbook schematic of a classic three-op-amp instrumentation amplifier. Two right-pointing op-amp triangles are arranged side by side as the input stage on the left, each with standard plus and minus input marks and its own feedback resistor network. The two input amplifiers are linked between their inverting paths by a single gain-setting resistor. Their outputs feed a third right-pointing op-amp triangle on the right configured as a differential amplifier, using a matched four-resistor network. The layout is symmetrical, with paired differential input terminals on the left and a single output terminal on the right, drawn with thin straight circuit lines and standard resistor symbols on a white background.

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