NationMaster - Encyclopedia: Equivalent noise resistance

In telecommunication, an equivalent noise resistance is a quantitative representation in resistance units of the spectral density of a noise-voltage generator, given by where $W n$ is the spectral density, $k$ is the Boltzmann's constant, $T 0$ is the standard noise temperature (290 K), so .

Note: The equivalent noise resistance in terms of the mean-square noise-generator voltage, $e 2$ , within a frequency increment, $Δ f$ , is given by .

Source: from Federal Standard 1037C

Categories: Noise

Results from FactBites:

Noise Parameter Extraction using Source Pull - Microwave Encyclopedia - Microwaves101.com (665 words)
	In the case of a low noise device, source pull is used in a noise parameter extraction setup to evaluate how signal-to-noise ratio (noise figure) varies with source impedance.
	In noise parameter extraction, the output is load-pulled to an impedance that provides good gain, then the input is swept all over the Smith chart.
	Measuring noise parameters using source pull is what is used to empirically gather all of the data you need to design a low noise amplifier, starting from the device level.

Equivalent noise resistance - Wikipedia, the free encyclopedia (126 words)
	In telecommunication, an equivalent noise resistance is a quantitative representation in resistance units of the spectral density of a noise-voltage generator, given by
	is the standard noise temperature (290 K), so
	Note: The equivalent noise resistance in terms of the mean-square noise-generator voltage, e

More results at FactBites »

COMMENTARY

Share your thoughts, questions and commentary here

Want to know more?
Search encyclopedia, statistics and forums:

Feeds | Contact
The Wikipedia article included on this page is licensed under the GFDL.
Images may be subject to relevant owners' copyright.
All other elements are (c) copyright NationMaster.com 2003-5. All Rights Reserved.
Usage implies agreement with terms.