What are the features of Operational amplifiers? Amplifiers are used in wireless communications and broadcasting, an audio equipment of all kinds. They can be categorized as either weak-signal amplifiers or power amplifiers. An operational amplifier is an integrated circuit that can amplify weak electric signals. An operational amplifier has two input pins and one output pin. Its basic role is to amplify and output the voltage difference between the two input pins. They are generally used to amplify weak electrical current in a circuit. Radios, stereo systems, headphones, TVs and many other electrical products include an operational amplifier as a component in many of their circuits. Op-amps can be classified into 3 main types based on the input/output voltage range: Dual Supply, Single-Supply, and Rail-to-Rail. Ideal op-amps use no power, have infinite input impedance, unlimited gain-bandwidth and slew rate, no input bias current, and no input offset. They have unlimited voltage compliance.

Arundathi Kuttappan

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