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 ?
It is a great triumph of skill to gain the former, but a still greater proof of generalship to maintain possession of the latter, for man must battle for his fortress at every door and window.
I got a cent ready in one hand and a florin in the other, intending to give him the former if he survived and the latter if he killed himself--for his loss would be my gain in a literary way, and I was willing to pay a fair price for the item --but this impostor ended his intensely moving performance by simply adding some powder to the liquid and polishing the spoon
And he did "tackle it again" -- and under the double pressure of curiosity and prospective gain he did it with such spirit that he accomplished a shining success.
Rise my soul, strain every nerve, Thy morgage to remove, Gain thy mother's heartfelt thanks Thy family's grateful love.
And as for Harriet, I will venture to say that she cannot gain by the acquaintance.
When young things begin to gain health they gain it rapidly.
It was very tiring and slow work, yet I did visibly gain ground; and as we drew near the Cape of the Woods, though I saw I must infallibly miss that point, I had still made some hundred yards of easting.
If the legislative authority, which possesses so many means of operating on the motives of the other departments, should be able to gain to its interest either of the others, or even one third of its members, the remaining department could derive no advantage from its remedial provision.
All at once from the dark line of the horizon whither it retired to gain its momentum, the monster rushed suddenly towards the Abraham Lincoln with alarming rapidity, stopped suddenly about twenty feet from the hull, and died out--not diving under the water, for its brilliancy did not abate--but suddenly, and as if the source of this brilliant emanation was exhausted.
These dates were inscribed in an itinerary divided into columns, indicating the month, the day of the month, and the day for the stipulated and actual arrivals at each principal point Paris, Brindisi, Suez, Bombay, Calcutta, Singapore, Hong Kong, Yokohama, San Francisco, New York, and London--from the 2nd of October to the 21st of December; and giving a space for setting down the gain made or the loss suffered on arrival at each locality.
And that is not all: even if man really were nothing but a piano-key, even if this were proved to him by natural science and mathematics, even then he would not become reasonable, but would purposely do something perverse out of simple ingratitude, simply to gain his point.
Hence those who use fire as an aid to the attack show intelligence; those who use water as an aid to the attack gain an accession of strength.