shot noise

See noise.

Shot Noise

random changes (fluctuations) in voltage and current relative to their mean value in the circuits of amplifiers, radios, and other electronic devices; caused by the shot effect in vacuum electronic and semiconductor instruments. For example, shot noise appears as acoustic noise in the loudspeaker of a radio, “snow” on a television screen, and “grass” on a radar screen. Shot noise is the basic component of the internal noises of electronic devices, which cause the distortion of weak signals and limit the sensitivity of amplifiers.

shot noise

[′shät ‚nȯiz] (electronics) Noise voltage developed in a thermionic tube because of the random variations in the number and the velocity of electrons emitted by the heated cathode; the effect causes sputtering or popping sounds in radio receivers and snow effects in television pictures. Also known as Schottky noise; shot effect.

shot noise

(Schottky noise) The random emission and velocity of electrons from a cathode, which was discovered by Walter Schottky. See Schottky.

单词	shot noise
释义	shot noise shot noise or shot effect n (Electronics) the inherent electronic noise arising in an electric current because of the discontinuous nature of conduction by electrons. Also called: Schottky noise Translations rumore granulare shot noise shot noise See noise. Shot Noise random changes (fluctuations) in voltage and current relative to their mean value in the circuits of amplifiers, radios, and other electronic devices; caused by the shot effect in vacuum electronic and semiconductor instruments. For example, shot noise appears as acoustic noise in the loudspeaker of a radio, “snow” on a television screen, and “grass” on a radar screen. Shot noise is the basic component of the internal noises of electronic devices, which cause the distortion of weak signals and limit the sensitivity of amplifiers. shot noise [′shät ‚nȯiz] (electronics) Noise voltage developed in a thermionic tube because of the random variations in the number and the velocity of electrons emitted by the heated cathode; the effect causes sputtering or popping sounds in radio receivers and snow effects in television pictures. Also known as Schottky noise; shot effect. shot noise (Schottky noise) The random emission and velocity of electrons from a cathode, which was discovered by Walter Schottky. See Schottky.
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