# What is gain?

• (noun): The amount by which the revenue of a business exceeds its cost of operating.

## 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.

### Some articles on gain:

Horn Antenna - Gain
... 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) is For conical horns, the gain is where A is ...
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 ...
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 ... amplifier configured to provide non-unity-gain, it can be analyzed using similar methods as with the generic Sallen–Key topology ... Q factor is given by The voltage divider in the negative feedback loop controls the gain ...

### More definitions of "gain":

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

### Famous quotes containing the word gain:

Competition is. In every business, no matter how small or how large, someone is just around the corner forever trying to steal your ideas and build his success out of your imagination, struggling after that which you have toiled endless years to secure, striving to outdo you in each and every way. If such a competitor would work as hard to originate as he does to copy, he would much more quickly gain success.
Alice Foote MacDougall (1867–1945)

Throughout the 1980’s, we did hear too much about individual gain and the ethos of selfishness and greed. We did not hear enough about how to be a good member of a community, to define the common good and to repair the social contract. And we also found that while prosperity does not trickle down from the most powerful to the rest of us, all too often indifference and even intolerance do.
Hillary Rodham Clinton (b. 1947)

If you associate enough with older people who do enjoy their lives, who are not stored away in any golden ghettos, you will gain a sense of continuity and of the possibility for a full life.