Transcription of Using Single Supply Operational Amplifiers in Embedded …
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Using Single Supply Operational Amplifiers in Embedded …
2000 Microchip Technology 1AN682 INTRODUCTIONB eyond 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.
2000 Microchip Technology Inc. DS00682C-page 3 AN682 An inverting amplifier configuration is shown in Figure 4. With this circuit, the signal at the input resis-
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