The extent to which a component, circuit, device, or system increases current, voltage, or power. Applicable especially to active devices, such as transistors and integrated circuits (ICs), and to amplifiers and filters that use them. Also used to express the directional properties of some antenna systems. Usually specified in decibels
(dB). See AMPLIFICATION, CURRENT AMPLIFICATION,
DECIBEL, VOLTAGE AMPLIFICATION,
and POWER AMPLIFICATION.