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Lecture 5: The ideal operational amplifier

Intelligent Sensor SystemsRicardo Gutierrez-OsunaWright State University1 Lecture 5: The ideal operational amplifiergThe ideal operational amplifiernTerminalsnBasic ideal op-amp propertiesgOp-amp familiesgOperational amplifier circuitsnComparator and buffernInverting and non- inverting amplifiernSumming and differential amplifiernIntegrating and differentiating amplifiernCurrent-voltage conversionIntelligent Sensor SystemsRicardo Gutierrez-OsunaWright State University2 The ideal op-amp gPrimary op-amp terminalsnInverting inputnNon- inverting inputnOutputnPower supplyFrom [Car91]Intelligent Sensor SystemsRicardo Gutierrez-OsunaWright State University3 ideal op-amp characteristicsgThe ideal op-amp is characterized by seven propertiesnKnowledge of these properties is sufficient to design and analyze a large number of useful circuitsgBasic op-amp propertiesnInfinite open-loop voltage gainnInfinite input impedancenZero output impedancenZero noise contributionnZero DC output offsetnInfinite bandwidthnDifferential inputs that stick togetherIntelligent Sensor SystemsRicardo Gutierrez-OsunaWright State University4 ideal Op-Amp PropertiesgProperty : Infinite Open-Loop GainnOpen-Loop Gain Avolis the gain of the op-amp without positive or negative feedbacknIn the ideal op-amp Avolis infinitegTypical values range from 20,000 to 200,000 in real devicesgProperty : Infinite Input

Intelligent Sensor Systems Ricardo Gutierrez-Osuna Wright State University 1 Lecture 5: The ideal operational amplifier g The ideal operational amplifier n Terminals n Basic ideal op-amp properties g Op-amp families g Operational amplifier circuits n Comparator and buffer n Inverting and non-inverting amplifier n Summing and differential amplifier n Integrating and differentiating amplifier

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  Operational, Amplifier, Operational amplifier, Inverting

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