# gain

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## gain

Electronics the ratio of the output signal of an amplifier to the input signal, usually measured in decibels
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

## 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).
Collins Dictionary of Astronomy © Market House Books Ltd, 2006

## 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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

## 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)

McGraw-Hill Concise Encyclopedia of Engineering. © 2002 by The McGraw-Hill Companies, Inc.

## gain

gain joint
In carpentry, a groove or notch in one piece into which another piece is fitted.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

## 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.
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
References in periodicals archive ?
Gaines wished Ball "great success" for his future, which could (https://www.ibtimes.com/nba-rumors-lonzo-ball-may-follow-fate-russell-randle-stardom-2775366) very well be away from the Lakers if the team decides to make another move for New Orleans Pelicans' Anthony Davis in the summer.
Commenting on the new season after production wrapped, Joanna Gaines said: "It was a season filled with laughs, tears, and lots of unique homes.
Louise: Thoughts and prayers with the family of bluenose Mark Gaines who has tragically passed away after being taken ill @BCFC.
Gaines "is a natural fit" for a home licensed brand, Loloi added.
Make sure the rug pattern has some white in it, though, Gaines says, "so that it ties into the white walls".
Gaines was hired to help with the annual school census.
Asked whether he was angry that Perry had come to California, Gaines said, "I believe in friendly competition."
A seasoned executive sales leader, Gaines has held senior management positions at several companies including ShoreTel, where for the last six years he was the Western regional vice president of sales and most recently the vice president of sales North America.
Authorities in Colerain Township, Ohio, US initially believed that Gaines was holding a handgun .
Now maintaining their innocence, both Williams and Gaines pleaded not guilty in state court last week.
The estate of Frances Gaines Blum Slagle, a 1940 ECCC graduate and former Decatur resident, recently presented the ECCC Foundation with about \$2.68 million in cash, stocks and certificates of deposit to be used to establish student scholarships.
Gaines comments on a common trope in his writings: broken familial bonds within African American communities.

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