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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 Systems Ricardo Gutierrez-Osuna Wright State University 4 Ideal Op-Amp Properties g Property No.1: Infinite Open-Loop Gain n Open-Loop Gain Avol is the gain of the op-amp without positive or negative feedback n In the ideal op-amp Avol is infinite g Typical values range from 20,000 to 200,000 in real devices g Property No.2: Infinite Input Impedance

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