Gain

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.

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Famous quotes containing the word gain:

    When goods increase, those who eat them increase; and what gain has their owner but to see them with his eyes?
    Bible: Hebrew, Ecclesiastes 5:11.

    We go to gain a little patch of ground
    That hath in it no profit but the name.
    William Shakespeare (1564–1616)

    This dog and man at first were friends;
    But when a pique began,
    The dog, to gain some private ends,
    Went mad and bit the man.
    Oliver Goldsmith (1730?–1774)