Amplifier

A circuit or element that provides gain.

Class A Amplifier Operation

The type of operation in which the amplifier is biased so that variations in input signal polarities occur within the limits of cutoff and saturation.

Class AB Amplifier Operation

The type of operation in which the amplifier is biased so that collector current is cut off for a portion of the alternation of the input signal.

Class B Amplifier Operation

The type of operation in which the amplifier is biased so that collector current is cut off for one-half of the input signal.

Class C Amplifier Operation

The type of operation in which the amplifier is biased so that collector current is cut off for more than one-half of the input signal.

See also: Amplification, Amplification Factor, Audio Amplifier, Blocking, Buffer Amplifier, Class A Amplifier Operation, Class AB Amplifier Operation, Class B Amplifier Operation, Class C Amplifier Operation, Degeneration, Direct Current Amplifier, Nondegenerative Parametric Amplifier, Operational Amplifier, Peaking Coil, Power Amplifier, Preamplifier, Push Pull Amplifier, Reactance Amplifier, RF Amplifier, Video Amplifier, Voltage Amplifier, Wideband Amplifier.