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Operational Amplifier Practice Test

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Voltage comparators perform as
Correct Answer:
Level Detectors
Explanation:
Voltage comparators are designed to decide which of two voltages is higher and to produce an output that reflects that decision. This makes them act as level detectors: they monitor a signal against a fixed reference and flip their output when the signal crosses that threshold. When the input surpasses the reference, the output switches to a high level; when it falls short, the output goes low. This threshold-crossing behavior is what you use to sense that a particular voltage level has been reached or exceeded. They’re not meant to amplify signals like amplifiers, not meant to generate repeating waveforms like oscillators, and not meant to accumulate input over time like integrators.

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