# gain

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## gain

Electronics the ratio of the output signal of an amplifier to the input signal, usually measured in decibels

## gain

1. A measure of the amplification of an electronic device. If the power input to the device is P 1 and the power output is P 2, the gain expressed in decibels is given by
G = 10 log10 (P 2 /P 1 )

Gains measured in this way can be added when amplifying stages are connected in series.

2. A measure of the directional advantage of using one radio antenna as compared with another. It is usual to express the gain, G , of a particular antenna over an isotropic radiator. For a lossless antenna it is given by
G = 4πA e2
where A e is the effective area (see array) and λ is the wavelength; the gain is equal to the directivity in this case. Sometimes the comparison is with a dipole, which itself has a gain over an isotropic radiator of 1.5 (equivalent to 1.7 decibels, or dBi).

## gain

[gān]
(electronics)
The increase in signal power that is produced by an amplifier; usually given as the ratio of output to input voltage, current, or power, expressed in decibels. Also known as transmission gain.
(electromagnetism)
(engineering)
A cavity in a piece of wood prepared by notching or mortising so that a hinge or other hardware or another piece of wood can be placed on the cavity.

## Gain

An increase in signal power or voltage produced by an amplifier in transmitting a signal from one point to another. The amount of gain is usually expressed in decibels above a reference level. See Amplifier

Antenna gain is a measure of the effectiveness of a directional antenna as compared to a nondirectional antenna. See Antenna (electromagnetism)

## gain

gain joint
In carpentry, a groove or notch in one piece into which another piece is fitted.

## gain

i. The amplification obtained in a radio circuit or a component of the circuit. It is measured as a direct ratio or logarithmically. In radar, there are two general usages of the term: (a) antenna gain, or a gain factor, is the ratio of the power transmitted along the beam axis to that of an isotropic radiator transmitting the same total power; and (b) receiver gain, or video gain, measures how much a receiver amplifies an incoming signal.
ii. A general term for the increase in signal power after transmission from one point to another. Gain is usually expressed in decibels and is widely used to denote transducer gain.

## gain

The amount of increase that an amplifier provides on the output side of the circuit.
References in periodicals archive ?
Gaines "is a natural fit" for a home licensed brand, Loloi added.
At the press conference, Gaines cited California's "diverse community," market size, education system and history as "a state of innovation" as attractive qualities for businesses.
Gaines started working outside the home when she was 13, as a waitress at the White House Dairy on Park Avenue.
Gaines is currently being held on \$2,000 bond in the Hamilton County Jail.
Since the respective arrests, Williams was released on a \$15,000 bond, while Gaines sits in prison on a \$50,000 bond.
Gaines, however, imbues these places of Black men's instruction with transforming potential as well.
Mr Gaines said Tyson asked him: "You didn't hear about them people getting killed back there?
Like many artists of his generation who emerged in the late 1960s, Gaines abandoned painting and in the process attempted to jettison subjectivity and replace it with noncompositional rules and generative structures--with systems, on the one hand, and chance, on the other.
Mr Gaines was airlifted to hospital following the accident, on the C16 Healeyfield Lane, near Consett, on Sunday morning.
Despite years in San Francisco exile, Gaines has placed all his fiction in rural Louisiana, never venturing even as far as New Orleans.
Gaines succeeds Bill Oberlin, who is retiring in July after working at Boeing for 25 years.

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