Using Single Supply Operational Amplifiers in …

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2000 Microchip Technology 1AN682INTRODUCTIONBeyond the primitive transistor, the Operational ampli-fier is the most basic building block for analog applica-tions. Fundamental functions such as gain, loadisolation, signal inversion, level shifting, adding and/orsubtracting signals are easily implemented with thisbuilding block. More complex circuits can also beimplemented, such as the instrumentation amplifier , acurrent to voltage converter, and filters, to name only afew. Regardless of the level of complexity of the opera-tional amplifier circuit, knowing the fundamental opera-tion and behavior of this building block will save aconsiderable amount of upfront design time. Formal classes on this subject can be very comprehen-sive and useful. However, many times they fall short interms of experience or common sense.

short tutorial is used. FUNDAMENTAL OPERATIONAL ... Using Single Supply Operational Amplifiers ... ative supply pin of the operational amplifier is tied to

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