Amplifier vs. Amplitude — What's the Difference?

An amplifier, electronic amplifier or (informally) amp is an electronic device that can increase the power of a signal (a time-varying voltage or current). It is a two-port electronic circuit that uses electric power from a power supply to increase the amplitude of a signal applied to its input terminals, producing a proportionally greater amplitude signal at its output.

The amplitude of a periodic variable is a measure of its change in a single period (such as time or spatial period). There are various definitions of amplitude (see below), which are all functions of the magnitude of the differences between the variable's extreme values.

One that amplifies, enlarges, or extends.

Greatness of size; magnitude.

An electronic device that is used to increase the magnitude of an electrical signal.

Fullness; copiousness.

A device that is used to increase the magnitude of an information-carrying signal.

Breadth or range, as of intelligence.

Anything that amplifies, or makes something larger or more intense.

(Astronomy) The angular distance along the horizon from true east or west to the intersection of the vertical circle of a celestial body with the horizon.

(linguistics) An adverb that adds intensity, such as "really" or "totally".

(Physics) The maximum absolute value of a periodically varying quantity.

(electronics) An appliance or circuit that increases the strength of a weak electrical signal without changing the other characteristics of the signal.

The maximum absolute value of a periodic curve measured along its vertical axis.

(music) A portable encasement that houses a large speaker, used to amplify voices and musical instruments at live performances.

The angle made with the positive horizontal axis by the vector representation of a complex number.

A lens that enlarges the field of vision.

(Electronics) The maximum absolute value reached by a voltage or current waveform.

One who or that which amplifies.

The measure of something's size, especially in terms of width or breadth; largeness, magnitude.

Electronic equipment that increases strength of signals passing through it

(mathematics) The maximum absolute value of the vertical component of a curve or function, especially one that is periodic.

(physics) The maximum absolute value of some quantity that varies.

(astronomy) The arc of the horizon between the true east or west point and the center of the sun, or a star, at its rising or setting. At the rising, the amplitude is eastern or ortive: at the setting, it is western, occiduous, or occasive. It is also northern or southern, when north or south of the equator.

(astronomy) The arc of the horizon between the true east or west point and the foot of the vertical circle passing through any star or object.

(firearms) The horizontal line which measures the distance to which a projectile is thrown; the range.

State of being ample; extent of surface or space; largeness of dimensions; size.

Largeness, in a figurative sense; breadth; abundance; fullness.

The arc of the horizon between the true east or west point and the center of the sun, or a star, at its rising or setting. At the rising, the amplitude is eastern or ortive: at the setting, it is western, occiduous, or occasive. It is also northern or southern, when north or south of the equator.

The horizontal line which measures the distance to which a projectile is thrown; the range.

The extent of a movement measured from the starting point or position of equilibrium; - applied especially to vibratory movements.

An angle upon which the value of some function depends; - a term used more especially in connection with elliptic functions.

(physics) the maximum displacement of a periodic wave

The property of copious abundance

Greatness of magnitude