Johnson noise

См. также в других словарях:

• Johnson noise — ☆ Johnson noise n. 〚after J. B. Johnson, 20th c. U.S. physicist〛 thermal background noise in a radio receiver * * * …   Universalium

• Johnson noise — ☆ Johnson noise n. [after J. B. Johnson, 20th c. U.S. physicist] thermal background noise in a radio receiver …   English World dictionary

• Johnson noise — šiluminis triukšmas statusas T sritis fizika atitikmenys: angl. Johnson noise; thermal agitation noise; thermal noise vok. thermisches Rauschen, n; Wärmegeräusch, n; Wärmerauschen, n rus. тепловой шум, m; шум теплового возбуждения, m pranc. bruit …   Fizikos terminų žodynas

• johnson noise — noun Usage: usually capitalized J Etymology: after John B. Johnson b1887 American physicist : thermal noise …   Useful english dictionary

• Johnson noise — noun see thermal noise …   Useful english dictionary

• Johnson–Nyquist noise — (thermal noise, Johnson noise, or Nyquist noise) is the electronic noise generated by the thermal agitation of the charge carriers (usually the electrons) inside an electrical conductor at equilibrium, which happens regardless of any applied… …   Wikipedia

• Noise equivalent temperature difference — (NETD) is a measure of the sensitivity of a detector of thermal radiation in the infrared, terahertz radiation or microwave radiation parts of the electromagnetic spectrum. It is the scene temperature difference equal to either the internal noise …   Wikipedia

• Noise-equivalent temperature — (NET) is a measure of the sensitivity of a detector of thermal radiation in the infrared, terahertz or microwave portions of the electromagnetic spectrum. It is the amount of incident signal temperature that would be needed to match the internal… …   Wikipedia

• Noise — This article is about noise as an unwanted phenomenon. For other uses, see Noise (disambiguation). NASA researchers at Glenn Research Center conducting tests on aircraft engine noise in 1967 In common use, the word noise means any unwanted …   Wikipedia

• Noise figure — (NF) is a measure of degradation of the signal to noise ratio (SNR), caused by components in a radio frequency (RF) signal chain. The noise figure is defined as the ratio of the output noise power of a device to the portion thereof attributable… …   Wikipedia

• Noise shaping — is a technique typically used in digital audio, image, and video processing, usually in combination with dithering, as part of the process of quantization or bit depth reduction of a digital signal. Its purpose is to increase the apparent signal… …   Wikipedia