# 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 ?
CEREDIGION NOC - No change PC gain 2, LD gain 1, Ind lose 3.
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The 1991 proposed regulations generally measured currency gain or loss by the difference between the amount of the remittance from the QBU, translated into the taxpayer's functional currency at the spot rate on the date of remittance, and the portion of the basis pool attributable to the remittance.
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CLIENTS WANT TO BE TAXED AT LONG-TERM CAPITAL GAIN RATES WHEN THEY SELL LAND DEVELOPED AS RESIDENTIAL LOTS OR CONDOMINIUMS.
If an athlete consumes 250 calories per day above the caloric needs--a 250-calorie profit--it will take 10 days to gain one pound of lean-body mass [2,500 cal / 250 cal/day = 10 days].
That's why the Section 1031 exchange, a method of protecting capital gains on real estate from unnecessary tax liability that was made popular by California property owners, is increasingly in favor here in New York as property values continue soaring.
Thus, it seems that the OIG assumed that all gain sharing with physicians would involve cutting needed services.
corporate seller cannot use this portion of the Section 1248 gain to increase the amount of its foreign tax credit limitation.
Nevertheless, critics of highstakes testing wonder whether those increases reflect real gains in students' knowledge and skills--gains that ought to translate to students' performance in school and on other exams.

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