shot noise


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Related to shot noise: thermal noise, partition 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.
References in periodicals archive ?
Now comparing (18) and (19), we have two scenarios upon decreasing the matching area; when the decrease in interference plus shot noise power terms (denominator) exceeds the decrease in the intended signal power (numerator), then [SINR.sub.P] exceeds [SINR.sub.T] and there is a gain on area reduction.
To theoretically determine the shot noise limited SNR an ideal rectangular spectrum S(k) = ([P.sub.0]/[DELTA]k)rect((k - [k.sub.c])/[DELTA]k) is considered.
Since the noise equivalent power (NEP) determines electronic noise of the detection system, it is essential to select a TIA and ADC with lower NEP in order to achieve a low electronic noise to shot noise ratio (ESR).
As a historical remark, the nonequilibrium noise, (46) namely the shot noise was discovered 10 years earlier than the equilibrium noise, (35,36) which might signal that our daily life is essentially nonequilibrium.
where bit = x is from the "0" or "1", PIIN, shot noise, and thermal noise are considered in the photocurrent analysis, the effect of the dark current is neglected, [I.sub.m,bit=x] is the modified photocurrent, [I.sub.t,bit=x] is the total photocurrent, [B.sub.r] is the electrical bandwidth, [tau] is the coherence time of the light incident to the photodiode, e is the charge on the electron, [K.sub.a] is Boltzmann's constant, [T.sub.n] is the absolute noise temperature, and [R.sub.o] is the load resistance.
Shot noise power at the receiving photodiode for SPD technique can be determined using (5) and (14):
Furthermore, by appropriate processes of limit, it can be demonstrated that the asymmetric dichotomic noise converges to Gaussian white noise, and it also converges to the white shot noise [33, 34].
Compound bows continue to evolve, with the advances usually being geared towards creating faster and lighter bows, though huge advances have also brought us increased accuracy and vast reductions in shot noise.
It modulates any stationary noise sources in the oscillator circuit (thermal noise of the resistor and shot noise of the transistor) and makes cyclostationary noise sources.
Randomness in the flux of incoming photons, called "shot noise," increases by the square root of the number of photons.
Wavelets allowed the researchers to increase the resolution of FRET results by reducing shot noise - distortion at a particular frequency - from the data.