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Operational Amplifiers - Concordia College

1 Operational AmplifiersA Linear IC circuitOperational amplifier (op-amp) An op-amp is a high-gain amplifier that has highinput impedance and low output impedance. An ideal op-amp has infinite gain and inputimpedance and zero output impedance. An integrated circuit (IC) contains a number ofcomponents on a single piece of semiconductor. Most op-amps are IC 741 Operational AmplifierOp-Amp input / output We consider the op-amp as a singlecomponent with inputand outputcharacteristics. Two signal inputs: Inverting Non-inverting Two dc power supplyleads (+ and ) One output lead3Op-Amp PackagesThe Operation of Op-amps The input stage of an op-amp is adifferential amplifier . The op-amp amplifies the differencebetween the two input terminal voltages. +V1V2 Vdiff =V2 V14Op-Amp output The output of the amplifier is determined by The gain of the amplifier .

Operational Amplifiers A Linear IC circuit Operational Amplifier (op-amp) •An op-amp is a high-gain amplifier that has high input impedance and low output impedance. •An ideal op-amp has infinite gain and input impedance and zero output impedance. •An integrated circuit (IC) contains a number of components on a single piece of semiconductor.

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