A device, tool, or person that makes comparisons; in electronics and computing, a device that compares two signals or values.
From Latin comparare (to compare) plus the suffix -or (one who does or a device that does). Technical term that emerged with industrial and electronic applications.
Comparators are hidden everywhere in modern technology—your phone uses them to decide if a fingerprint matches, your car uses them to adjust engine timing, and they're fundamental to how computers make any decision.
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