What is an Amplifier…? An Amplifier is a device which takes small voltage at the input, amplifies it and produce higher voltage at the output. The gain.

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Operational Amplifiers

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Presentation transcript:

What is an Amplifier…? An Amplifier is a device which takes small voltage at the input, amplifies it and produce higher voltage at the output. The gain of an amplifier can be referred as the amount by which the signal get amplified.

OPERATIONAL AMPLIFIERS High gain DC amplifier. Gain being the order of 100,000 of more. Supplied as an integrated circuit on si chip.

TYPES OF INPUT Negative inverting input Positive non-inverting input Negative voltage supply Positive voltage supply Offset null inputs

Symbolic Representation..

Op-Amps Perform As: V-I & I-V Converter The Signal adder Signal magnifier Filter for noise reduction Analogue-Digital & Digital-Analogue Convertor Interface between sensors & Microprocessor

TYPES INVERTING AMPLIFIER NON-INVERTING AMPLIFIER SUMMING AMPLIFIER INTEGRATING AMPLIFIER DIFFRENTIAL AMPLIFIER

Non-Inverting Amplifier

Inverting Amplifier

Summing Amplifier

Integrating Amplifier

Differential Amplifier