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 ?
The domination of Gainers over Losers did not start at the same time everywhere.
The decrease in the net gainers score comes after a 19-point increase over the previous two quarters.
business that she owns with her husband, Ron Gainer, about 24 miles south of Burns.
The high gainers appeared to be more reflective about what and how they said they learned.
With today's rebound, the stock has achieved close to 38 per cent gain this year, the second biggest gainer this year.
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Although Taiwan's insurers entered the China market some five years ago, some still can't meet the "532" standard, which the fast-track gainers' list in the ECFA has eased to allow aspiring insurers in Taiwan to explore the China market.
EFG Eurobank and the National Bank of Greece (Cyprus) were the top gainers in terms of bank deposits in May, according to the Central Bank of Cyprus May 2010 report.
The major gainers during the month were Grand Real Estate Projects (106.2%), Danah Al Safat Foodstuff Co.
All the six GCC markets posted positive returns in April, with Saudi Arabia leading the gainers with a return of 20.8 percent.
Other double-digit gainers in the sector included Anglo American and BHP Billiton, which rose 193p to 1429p and 152.5p to 1128p respectively.
The company also revealed that Dailymotion.com became the second-biggest gainer in November, increasing 31% to 4m visitors and Commentcamarche.net, a source for technical answers, appeared in the Top 10 Gainers list for the second month running.