05 - Operational Amplifiers

05 - Operational Amplifiers - EECS 215 Operational...

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EECS 215 Operational Amplifiers J. Phillips EECS 215
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J. Phillips EECS 215 Operational Amplifier “Op Amp” Behaves like a voltage controlled voltage source (VCVS) Active circuit designed for math operations, analog computation Commonly used for analog signal processing J. Phillips EECS 215 Operational Amplifier “Op Amp” Two input terminals, inverting and non- inverting One output Power supply V + , V - Offset null to “zero” device
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J. Phillips EECS 215 Inside The Op-Amp (741) J. Phillips EECS 215 Ideal vs Non-Ideal Op Amp V -,in V +,in +- - + V offset R i + - v d Av d R o V o 0 0 i offset o R V A R < ∞ < ∞ > Non-Ideal Ideal V -,in V +,in + - v d d V o 0 0 i offset o R V A R →∞ = = No current at input terminal v d =0 KCL cannot be used at output terminal – power supply
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J. Phillips EECS 215 Inverting Amplifier Determine output voltage by nodal analysis 2 1 i i = f o i R v v R v v = 1 1 1 i f o v R R v 1 = Gain depends on feedback resistor J. Phillips EECS 215 Non-Inverting Amplifier
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05 - Operational Amplifiers - EECS 215 Operational...

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