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Analog Electronic Circuits

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Applications of Operational Amplifiers

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What is a comparator? What are the applications of comparators?

A comparator is an electronic circuit which can compare an input voltage signal (Vin) with a known reference voltage (Vref). It is basically an open-loop operational amplifier. The input voltage is applied to one of the input terminals of an OP-AMP and the reference voltage is applied at the other terminal of OP-AMP. Comparator is used in Schmitt triggers, analog-to-digital converters and oscillators or multivibrator circuits.