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 ?
Now what interest in the world, then, is there left - what interest in the world can you possibly represent - which can be the gainer by your present action?
The power which is to be the gainer," he said quietly, " is the power encompassed by these walls,"
When opposition gets fairly into the councils of a tribe, it is rarely that humanity is the gainer.
And how will his children be the gainers if he takes them into Thessaly, and deprives them of Athenian citizenship?
A rigorous adherence, however, to this principle, is waived by those who would be gainers by it.
And if you do not succeed," said Baisemeaux, "at least beg that he may be transferred to the ten-franc list, by which both he and I shall be gainers.
Let us have a little algebra, instead of this trite rhetoric,--universal signs, instead of these village symbols,--and we shall both be gainers.
Yes, but so far," answered the other, "from speaking in behalf of his religion, he assured me the Catholicks did not expect to be any gainers by the change; for that Prince Charles was as good a Protestant as any in England; and that nothing but regard to right made him and the rest of the popish party to be Jacobites.
Gainer learned during a ride from Broskey why he took the job, and felt "compelled to help.
Sunday's top gainer was Al Madina Investment, up by 9.
The biggest gainer of 2014 was Alibaba founder and executive chairman Jack Ma, the former English teacher-turned billionaire entrepreneur.
The sector indices were meanwhile all red but three, as the consumer services index finished the day as the lone gainer and the healthcare and utilities indices ended the session unchanged.