Questions tagged [noise-spectral-density]
Anything related to the noise spectral density, i.e. the function representing how the power of the noise signal is distributed among its frequency components.
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A-Weighted Noise Power Calculation
Can anyone please show me how to calculate the A-weighted noise power of a noise source.
Consider the case of a resistor having a spectral density of 4kTR.
What is the A-weighted noise power of this ...
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Unit in the exponent for phase modulation
How does the "unit" per Hertz in behave in the exponent? My specific question is about the calculation of the modulation index \$\eta\$ from a measured spectral density of a phase modulation on a ...
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Flicker Noise and Phase Noise [duplicate]
In the formula above , it is given that jitter due to flicker noise = n x timining variation / t
since n/t = 1/f , shudnt the formula be timing variation / f then instead of timing variation * t
(...
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Why are there two sets of ENBW correction factors?
For calculating the equivalent noise bandwidth of a non-brickwall filter, I can find two different sets of numbers, both of which claim they are similar things:
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Does this RF white noise signal look correct?
I experimented with a simple RF white noise generator using avalanche breakdown on an NPN BFR93A transistor. I've used a voltmeter and an ammeter to determine the breakdown voltage and associated ...
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Understanding noise in analog circuit
I have been wondering in this analog circuit when we try to find out the input referred noise, how I went about is, I first found out the output referred noise power spectral density. I modelled a ...
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1/f noise, is it limited?
Basically my question is:
I doubt noise density goes to infinity because we can reach the limit f→0 in any DC circuit in contrast to the limit f→∞ (which is an idealization because all circuit behaves ...
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Opamp noise analysis corner frequencies calculation
I am learning about opamp noise calculation in this document.You can see calculation example:1 in page no:7.
Below equations are used for calculating the corner frequencies.
The calculation are given ...
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White Noise Equivalent Bandwidth (NEB)
This question is regarding White Noise Equivalent Bandwidth (NEB).I was going through this material from Renesas .
The definition of NEB is given as when running white noise through a first order low-...
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Why opamp noise gain is referred to non inverting input
I was learning about noise analysis of opamp with the help of this document.It says that for Noise Gain In op-amp circuits, noise is commonly assigned to the non-inverting op-amp input.
But no ...
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I want to design a ultra stable low noise current source for a generalized application [closed]
Which technology nodes have the best low noise output comparing the technology and to find out the best possible architecture and topology which fits both consideration?
Some technology comparison ...
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Random telegraphic noise and Lorentzian noise power spectral density
Following the example of the Lorentzian noise power spectral density shown above (ref), I would like to clarify the following:
In the first figure (labeled by (c)), May I please know why the constant ...
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Noise density in 1/f region
The datasheet of the ADR1000 voltage reference specifies the 1/f noise density as 30nV/sqrt(Hz) at 10Hz and 300nV/sqrt(Hz) at 0.1Hz.
Given that this is the 1/f region of the voltage reference, how can ...
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Noises are measured over a bandwidth. Is 50Hz and 900Hz noise the same at 1kHz bandwidth? [closed]
They say noise is over a bandwidth. At a bandwidth of 1000Hz. Is the noise at 50Hz and 900Hz similar? If yes. Please made a quick drawing how the noise at 50Hz and 900Hz look like roughly so I can ...
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Phase-modulated Noise
If you replace the carrier signal in a phase modulated circuit with noise then presumably the noise will be modulated. What must be considered if we wish to detect this noise modulation? I’ve ...
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