Comparer vs. Comparator

Comparernoun

One who, or that which, compares.

Comparernoun

One who compares.

Comparatornoun

Any device for comparing a physical property of two objects, or an object with a standard.

Comparatornoun

An electronic device that compares two voltages, currents or streams of data.

Comparatornoun

(law) anything that serves comparison

Comparatornoun

An instrument or machine for comparing anything to be measured with a standard measure; - applied especially to a machine for comparing standards of length.

Comparator

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 V + {\displaystyle V_{+}\,} and V − {\displaystyle V_{-}\,} and one binary digital output V o {\displaystyle V_{\rm {o}}\,} .