Definition of Operational amplifier

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Definition of Operational amplifier SEARCH NOW
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An operational amplifier or op-amp is an electronic circuit module (normally built as an integrated circuit , but occasionally with discrete transistors or vacuum tubes ) which has a non-inverting input (+), an inverting input (-) and one output. The output voltage is the difference between the + and - inputs multiplied by the open-loop gain: V out = (V + − V ) * G openloop . Since op-amps have uniform parameters and often standardized packaging as well as standard power supply needs, they help in designing an application fast. Originally, op-amps were so named because they were used to model the basic mathematical operations ( add , subtract , multiply , divide , integrate , differentiate etc) in electronic analog computers . In this sense a true operational amplifier is an ideal circuit element. The real ones we use, made of transistors, tubes etc, are approximations to this ideal. The ideal op-amp has an infinite open-loop gain , infinite bandwidth , infinite input impedances , zero
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