Audio-frequency amplifier

Audio-frequency amplifier

An amplifier that operates in part or all of the frequency range 20 Hz to 20 kHz. High-fidelity amplifiers function over a somewhat wider range (e.g., 10 Hz to 50 kHz).

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Industry/Domain: Engineering
Category: Electronic engineering
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Related terms

audio-frequency amplifier

Engineering; Electronic engineering

An amplifier that operates in part or all of the frequency range 20 Hz to 20 kHz. High-fidelity amplifiers function over a somewhat wider range (e.g., 10 Hz to 50 kHz).

audio-frequency amplifier

Aviation; Aeronautics

An electronic amplifier capable of amplifying alternating current whose frequency is in the range that can be heard by the human ear.

amplifier

Physics; Electromagnetism

An electronic device that increases the strength of a sound or an electric current. Television and radio have amplifiers.

amplifier

Engineering; Electronic engineering

Any device that increases the magnitude of an applied signal. It receives an input signal and delivers a larger output signal that, in addition to its increased amplitude, is a ...

amplifier

Telecommunications; General telecom

1. An electronic component that boosts the voltage or power level of a signal that is a linear replica of the input signal, but with greater power or voltage level, and sometimes ...

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Earth science; Mapping science

A device in which an input of varying voltage, current, or power is amplified. Any electronic distance measuring instrument, angle measuring instrument or frequency measuring ...

Alexanderson

Engineering; Electronic engineering

American inventor who developed the first practical television system in 1930. He later improved upon his invention when he developed color television in 1955.

decibel (dB)

Engineering; Electronic engineering

A practical unit of relative gain. In terms of power, the relative gain in decibels is equal to: Gain (dB) = 10 log 10 ( P out /P in ), where P out is the output power and P ...

audio-frequency meter

Engineering; Electronic engineering

An instrument to measure frequencies in the audio-frequency spectrum (approximately 20 Hz to 20 kHz). Three types are commonly used: * Analog - Gives direct indications of ...

Boltzmann's principle

Engineering; Electronic engineering

A description of the statistical distribution of large numbers of tiny particles under the influence of a force, such as an electric or magnetic field. When the system is in ...

current-hogging injection logic (CHIL)

Engineering; Electronic engineering

A form of bipolar digital logic, similar to current hogging logic but having the greater density characteristic of injection logic.

current-limiting resistor

Engineering; Electronic engineering

A series resistor inserted into a circuit to limit the current to a prescribed value.

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