Buffer amplifiers have unity gain.

RF amplifiers are devices that accept a varying input signal and produce an output signal that varies in the same way, but with larger amplitude

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

Operational transconductance amplifiers (OTA) are devices that convert an input voltage to an output current.

RF waveguide amplifiers accept a varying input signal and produce an output signal that varies in the same way, but with a larger amplitude

Complementary metal oxide semiconductor (CMOS) cameras use image sensors that operate at lower voltages than charged coupled devices (CCDs), reducing power consumption for portable applications.

Active filters are electronic filers that use active components such as voltage amplifiers or operational amplifiers.