Amplifier and comparator chips are board-level components for amplifying voltage, current, or power

Operational amplifiers (op amps, op-amps) are general-purpose, closed-loop devices that are used to implement linear functions

Power operational amplifiers (POA) are used to increase the power of low-level signals in applications that drive low impedances or reactive loads.

Instrumentation amplifier chips are precision amplifier circuits with both high-impedance differential inputs and high common-mode rejection

Signal amplifiers accept signals from sensors and other devices and amplify them to levels suitable for further processing or digitization by computer elements

Current sense amplifiers are integrated circuits with operational amplifiers and sense resistors that are used in measuring the amplitude and direction of current in circuits

Instrumentation amplifiers are differential amplifiers that have been optimized for use with DC signals.