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Applied Electro-Optics by Louis Desmarais

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Appendix B Op-Amp Basics

B.1 The Ideal Op-Amp

Our discussion of the op-amp in this section will be limited to the ideal case. We will not be concerned with the construction of this component. A block diagram will be used to represent the op-amp with the associated circuitry external to it. The various electrical parameters of the op-amp will also be defined. We will consider only the inverting and non-inverting configurations using simple resistors.

Figure B–1 shows a block diagram used to represent the op-amp. You will notice that it has two inputs and one output. These inputs are known as the (−) or inverting and the (+) or non-inverting. Ideally, the input resistance is effectively infinite, the output is zero ohms, and the voltage gain ...

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