Gain

==Electronics== In electronics, gain is usually taken to meaning the ratio of the signal of a system to the signal of the system. A gain of 10 would imply that a property of the signal (usually voltage or Power (physics)) had increased by a factor of 10. In electronics, it is common to use a logarithmic unit to measure gain. Originally, the bel was used. Gain = log (''P''₂/''P''₁) bels. This unit turned out to be a bit 'chunky', so the decibel (one tenth of a bel) became popular in its place. As there are 10 decibels in a bel, gain = 10 * log (''P''₂/''P''₁) dB. Note: base 10 logarithms are used (a similar unit involving natural logarithms is the neper). When voltages are used instead of powers, the formula changes to 20 * log (''V''₂/''V''₁) dB. Strictly speaking, this only holds true if the load impedances are identical. In many modern electronic devices, output impedances are low enough and input impedances high enough that load can be ignored without significantly affecting the calculation. If an amplifier produces an output of 1 volt into a 1 ohm load, then it is providing 1 watt of output power. If the amplifier is then altered to produce an output of 10 volts into the same load, it is now providing 100 watts of output power (''P'' = ''V''²/''R''). Voltage gain = 10x. Power gain = 100x. Gain (dB) = 20 dB; it is inappropriate to state whether this is voltage gain or power gain. You can see that 10 log (''P''₂/''P''₁) = 20 log (''V''₂/''V''₁). [ EDIT -- The previous paragraph doesn't make sense. In any context where it isn't clear whether it is voltage or power gain that is being referred to, the statement "Gain = 20 dB" is ambiguous. It could mean either "''V''₂/''V''₁ = 10 , ''P''₂/''P''₁ = 100" or "''V''₂/''V''₁ = 100 , ''P''₂/''P''₁ = 10000". If what was meant was "unless stated otherwise, it's assumed that gain refers to power rather than voltage", then that's what should have been said. ] In antenna (electronics) design, gain is the logarithm of the ratio of the antenna's radiation pattern to that of some ideal antenna, typically the theoretical isotropic antenna. A gain of 1x or 0 dB (where both input and output are at the same level) is also known as ''unity gain''. See also * ''Main'': Federal Standard 1037C, Transmitter power output, Absolute gain, Loop gain, Insertion gain, Directive gain, Signal processing gain, Net gain, Automatic gain control, * ''Loss'': Aperture-to-medium coupling loss, Effective radiated power, * ''Other'': Space charge, Front-to-back ratio, Fade margin, Maximal-ratio combiner, Neper, Passband, Photocurrent, Transmission level point, Relative transmission level, Transmitter, Karplus-Strong string synthesis, RFID, Antenna (electronics), Frequency response, Frequency compensation * ''Items'': Tesla coil, Amplifier (Electronic amplifier, Operational amplifier), Oscilloscope, Collinear antenna array, Darlington transistor, BiCMOS, Active laser medium, Omnidirectional antenna, Helical antenna, Dipole antenna, Yagi antenna, Unity, Nonlinear distortion, Instrument amplifier, Differential amplifier, Tradeoff ---- ==Finance== In finance, gain is profit or increase in value of an investment such as stock and bond. Gain is calculated by fair market value or proceed from sale of the investment minus the sum of purchase price and all cost associated with it. If the investment is not converted into cash or another asset the gain is called unrealized gain. List of popular business books: Powers, Richard, "''Gain''". Farrar, Straus and Giroux, 1998. See also: Workplace, The Protestant Ethic and the Spirit of Capitalism, List of accounting topics, Prospect theory ---- ==Literature== ''Gain'' is a novel by American author Richard Powers. ---- ==Psychology== In psychology, primary gain and secondary gain are commonly seen in somatoform disorders. See also: Desensitation

Gain

somebuddy shud make this in2 a disambiggyfries page

---

See other meanings of words starting from letter:

G

GA | GB | GC | GD | GE | GF | GH | GI | GJ | GK | GL | GM | GN | GO | GP | GR | GS | GT | GU | GW | GX | GY | GZ |

Words begining with Gain:

Gain
Gain
Gain-bandwidth_product
Gain-switching
GAINAX
GAiNAX
Gainax
Gainax
Gainax
Gainax_bounce
Gainer
Gainer
Gaines
Gaines,_MI
Gaines,_Michigan
Gaines,_New_York
Gaines,_New_York
Gainesboro,_Tennessee
Gainesboro,_TN
Gainesville
Gainesville,_AL
Gainesville,_Alabama
Gainesville,_Alabama
Gainesville,_FL
Gainesville,_Florida
Gainesville,_Florida
Gainesville,_GA
Gainesville,_Georgia
Gainesville,_Missouri
Gainesville,_MO
Gainesville,_New_York
Gainesville,_Texas
Gainesville,_TX
Gainesville,_VA
Gainesville,_Virginia
Gainesville_(FL)
Gainesville_(town),_New_York
Gainesville_(town),_Wyoming_County,_New_York
Gainesville_(town),_WY_County,_New_York
Gainesville_(village),_New_York
Gainesville_(village),_Wyoming_County,_New_York
Gainesville_(village),_WY_County,_New_York
Gainesville_College
Gainesville_Eight
Gainesville_High_School
Gainesville_Lake_(Alabama)
Gainesville_Regional_Airport
Gainesville_Sun
Gaines_County
Gaines_County,_Texas
Gaines_County,_Texas
Gaines_County,_Texas
Gaines_County,_TX
Gaines_Township
Gaines_Township,_Genesee,_MI
Gaines_Township,_Genesee,_Michigan
Gaines_Township,_Genesee_County,_MI
Gaines_Township,_Genesee_County,_Michigan
Gaines_Township,_Kent,_MI
Gaines_Township,_Kent,_Michigan
Gaines_Township,_Kent_County,_MI
Gaines_Township,_Kent_County,_Michigan
Gaines_Township,_MI
Gaines_Township,_Michigan
Gaines_Township,_PA
Gaines_Township,_Pennsylvania
Gaines_Trace
Gainford
Gainford,_County_Durham
Gainful
Gainsborough
Gainsborough,_England
Gainsborough,_Lincolnshire
Gainsborough,_Lincolnshire
Gainsborough_(UK_Parliament_constituency)
Gainsborough_Old_Hall
Gainsborough_Pictures
Gainsborough_studios
Gainsthorpe
Gainsville
Gainsville,_GA
Gainsville,_Georgia
Gaintheworld
Gain_medium

These materials are based on Wikipedia and licensed under the GNU FDL