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This diagram correspond to an instrumentation amplifier, the same as the one presented in the 'Examples' section but with some changes; the differential input is a 1Hz/1V sine wave and the In-Amp gain is set to 10 so you can clearly see the amplification and the inverted output wave. Also, a resistor was placed at the output to simulate load in the circuit.
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What is an Instrumentation Amplifier?
"An instrumentation (or instrumentational) amplifier is a type of differential amplifier that has been outfitted with input buffer amplifiers, which eliminate the need for input impedance matching and thus make the amplifier particularly suitable for use in measurement and test equipment. Additional characteristics include very low DC offset, low drift, low noise, very high open-loop gain, very high common-mode rejection ratio, and very high input impedances. Instrumentation amplifiers are used where great accuracy and stability of the circuit both short and long-term are required." (Wikipedia)
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