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Comparator
Device that compares two voltages or currents / From Wikipedia, the free encyclopedia
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For other uses, see Comparator (disambiguation).
In electronics, a comparator is a device that compares two voltages or currents and outputs a digital signal indicating which is larger. It has two analog input terminals and
and one binary digital output
. The output is ideally
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/9/98/Calibration_Comparator_%287504822476%29.jpg/640px-Calibration_Comparator_%287504822476%29.jpg)
A comparator consists of a specialized high-gain differential amplifier. They are commonly used in devices that measure and digitize analog signals, such as analog-to-digital converters (ADCs), as well as relaxation oscillators.