What is gain?

  • (verb): Increase in.
    Example: "Gain momentum"; "gain nerve"
    See also — Additional definitions below

Gain

In electronics, gain is a measure of the ability of a circuit (often an amplifier) to increase the power or amplitude of a signal from the input to the output. It is usually defined as the mean ratio of the signal output of a system to the signal input of the same system. It may also be defined on a logarithmic scale, in terms of the decimal logarithm of the same ratio ("dB gain"). A gain greater than one (zero dB), that is, amplification, is the defining property of an active component or circuit, while a passive circuit will have a gain of less than one.

Read more about Gain.

Some articles on gain:

Horn Antenna - Gain
... little loss, so the directivity of a horn is roughly equal to its gain ... The gain G of a pyramidal horn antenna (the ratio of the radiated power intensity along its beam axis to the intensity of an isotropic antenna with the same input power ...
Sallen–Key Topology - Application: Bandpass Filter
... An example of a non-unity-gain bandpass filter implemented with a VCVS filter is shown in Figure 5 ... uses a different topology and an operational amplifier configured to provide non-unity-gain, it can be analyzed using similar methods as with the generic Sallen–Key topology ... in the negative feedback loop controls the gain ...
Gain - Logarithmic Units and Decibels - Example
... What is its voltage and power gain? A ... Voltage gain is simply The units V/V are optional, but make it clear that this figure is a voltage gain and not a power gain ... Using the expression for power, P = V2/R, the power gain is Again, the units W/W are optional ...

More definitions of "gain":

  • (noun): The amount by which the revenue of a business exceeds its cost of operating.
  • (noun): A quantity that is added.
    Example: "They recorded the cattle's gain in weight over a period of weeks"
    Synonyms: addition, increase
  • (verb): Rise in rate or price.
    Synonyms: advance
  • (noun): The amount of increase in signal power or voltage or current expressed as the ratio of output to input.
    Synonyms: amplification
  • (verb): Win something through one's efforts.
    Example: "Gain an understanding of international finance"
    Synonyms: acquire, win
  • (verb): Increase (one's body weight).
    Synonyms: put on
  • (noun): The advantageous quality of being beneficial.
    Synonyms: profit
  • (verb): Obtain.
    Synonyms: derive

Famous quotes containing the word gain:

    As the Sandwich Islander believes that the strength and valor of the enemy he kills passes into himself, so we gain the strength of the temptation we resist.
    Ralph Waldo Emerson (1803–1882)

    [A man’s] moral conscience is the curse he had to accept from the gods in order to gain from them the right to dream.
    William Faulkner (1897–1962)

    Masculinity is not something given to you, but something you gain. And you gain it by winning small battles with honor.
    Norman Mailer (b. 1923)