Comparators are fundamental linear electronic devices used to compare two voltage signals and produce a digital output indicating which input is greater. They are widely used in various applications such as voltage level detection, waveform shaping, signal conditioning, and triggering in electronic circuits. Comparators operate by amplifying the voltage difference between their inputs and driving the output to a logic high or low state based on the comparison result. They are available in different configurations and with various performance characteristics to suit specific application requirements in areas such as instrumentation, control systems, audio processing, and power management.