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 classic literature ?
I often went a hunting with them, and frequently gained their applause for my activity at our shooting-matches.
Is her healthful presence potent enough to chase away the crowd of pale, hideous, and sinful phantoms, that have gained admittance there since her departure?
It had been her habit, from an almost immemorial date, to go about the country as a kind of voluntary nurse, and doing whatever miscellaneous good she might; taking upon herself, likewise, to give advice in all matters, especially those of the heart, by which means -- as a person of such propensities inevitably must -- she gained from many people the reverence due to an angel, but, I should imagine, was looked upon by others as an intruder and a nuisance.
I could feel in him how he already, from my at first finding nothing to reply, perceived the advantage he had gained.
Hiding his canoe, still afloat, among these thickets, with its prow seaward, he sat down in the stern, paddle low in hand; and when the ship was gliding by, like a flash he darted out; gained her side; with one backward dash of his foot capsized and sank his canoe; climbed up the chains; and throwing himself at full length upon the deck, grappled a ringbolt there, and swore not to let it go, though hacked in pieces.
According to this account and what was subsequently learned, it seemed that the scaramouch in question had gained a wonderful ascendency over almost everybody in the Jeroboam.
Jerry patted and talked to him a good deal, and very soon they understood each other, and Jerry said that with an easy bit and plenty of work he would be as gentle as a lamb; and that it was an ill wind that blew nobody good, for if his lordship had lost a hundred-guinea favorite, the cabman had gained a good horse with all his strength in him.
If hides and guts were slashed and rendered useless there was no way of tracing it to any one; and if a man lay off and forgot to come back there was nothing to be gained by seeking him, for all the rest would quit in the meantime.