Difference between instrumentation amplifier and differential amplifier
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An instrumentation amplifier, like other kinds of differential amplifier, is designed to measure the difference between input voltages. ... Instrumentation amplifiers are specifically designed for applications that require excellent DC characteristics, high input impedance, low noise and drift.
Op-amp stands for operational amplifier. ... Originally, op-amps were so named because they were used to model the basic mathematical operations of addition, subtraction, integration, differentiation, etc. in electronic analog computers. In this sense a true operational amplifier is an ideal circuit element.
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An instrumentation amplifier allows an engineer to adjust the gain of an amplifier circuit without having to change more than one resistor value. Compare this to the differential amplifier, which we covered previously, which requires the adjustment of multiple resistor values.
The so-called instrumentation amplifier builds on the last version of the differential amplifier to give us that capability