Temat: flicker-noise - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Measurement of Noise in Supercapacitors
Autorzy:: Szewczyk, A.
Powiązania:: https://bibliotekanauki.pl/articles/221256.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: supercapacitor
flicker noise
measurement set-up
reliability
Opis:: A developed method and measurement setup for measurement of noise generated in a supercapacitor is presented. The requirements for noise data recording are considered and correlated with working modes of supercapacitors. An example of results of low-frequency noise measurements in commercially available supercapacitors are presented. The ability of flicker noise measurements suggests that they can be used to assess quality of tested supercapacitors.
Źródło:: Metrology and Measurement Systems; 2017, 24, 4; 645-652
0860-8229
Pojawia się w:: Metrology and Measurement Systems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Portable exhaled breath analyzer employing fluctuation-enhanced gas sensing method in resistive gas sensors
Autorzy:: Kwiatkowski, A.
Chludziński, T.
Smulko, J.
Powiązania:: https://bibliotekanauki.pl/articles/220591.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: resistance gas sensor
fluctuation enhanced sensing
flicker noise
gas detection
breath sample collection
Opis:: This paper presents a portable exhaled breath analyser, developed to detect selected diseases. The set-up employs resistive gas sensors: commercial MEMS sensors and prototype gas sensors made of WO₃ gas sensing layers doped with various metal ingredients. The set-up can modulate the gas sensors by applying UV light to induce physical changes of the gas sensing layers. The sensors are placed in a tiny gas chamber of a volume of about 22 ml. Breath samples can be either injected or blown into the gas chamber when an additional pump is used to select the last breath phase. DC resistance and resistance fluctuations of selected sensors using separate channels are recorded by an external data acquisition board. Low-noise amplifiers with a selected gain were used together with a necessary bias circuit. The set-up monitors other atmospheric parameters interacting with the responses of resistive gas sensors (humidity, temperature, atmospheric pressure). The recorded data may be further analysed to determine optimal detection methods.
Źródło:: Metrology and Measurement Systems; 2018, 25, 3; 551-560
0860-8229
Pojawia się w:: Metrology and Measurement Systems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Informational essence of flicker-noise
Informacyjna zawartość fliker-szumu
Autorzy:: Stadnyk, B
Kolodiy, Z.
Depko, P.
Powiązania:: https://bibliotekanauki.pl/articles/155028.pdf
Data publikacji:: 2006
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: fliker-szum
gęstość widmowa
struktura wewnętrzna
flicker-noise
spectral density
internal structure
time of relaxation
Opis:: It was presented the computer simulation results of chaotic motion. They showed that flicker-constituent noises were contained the information about explored system features of internal structure. The criterion for estimation the change of mentioned structure by means of flicker-noises was offered.
Podano wyniki komputerowego modelowania chaotycznego ruchu, które pokazują, że fliker-składowa szumu zawiera informację o osobliwościach wewnętrznej struktury badanego systemu. Zaproponowano kryteria oceny zmiany wewnętrznej struktury na podstawi fliker-szumów.
Źródło:: Pomiary Automatyka Kontrola; 2006, R. 52, nr 12, 12; 50-52
0032-4140
Pojawia się w:: Pomiary Automatyka Kontrola
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Estimating the noise-related error in continuous-time integrator-based ADCs
Autorzy:: Gosselin, P.
Koukab, A.
Kayal, M.
Powiązania:: https://bibliotekanauki.pl/articles/398023.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:: noise
white noise
flicker noise
error
accuracy
standard deviation
variance
integrator-based ADC
incremental
Sigma-Delta
szum
szum biały
fliker-szum
błąd
dokładność
odchylenie standardowe
wariancja
ADC
Opis:: From first-order incremental ΣΔ converters to controlled-oscillator-based converters, many ADC architectures are based on the continuous-time integration of the input signal. However, the accuracy of such converters cannot be properly estimated without establishing the impact of noise. In fact, noise is also integrated, resulting in a random error that is added to the measured value. Since drifting phenomena may make simulations and practical measurements unable to ensure longterm reliability of the converters, a theoretical tool is required. This paper presents a solution to compute the standard deviation of the noise-generated error in continuous-time integrator-based ADCs, under the assumption that a previous measure is used to calibrate the system. In addition to produce a realistic case, this assumption allows to handle a theoretical issue that made the problem not properly solvable. The theory is developed, the equations are solved in the cases of pure white noise, pure flicker noise and low-pass filtered white noise, and the implementation issues implied by the provided formulas are addressed.
Źródło:: International Journal of Microelectronics and Computer Science; 2016, 7, 2; 54-59
2080-8755
2353-9607
Pojawia się w:: International Journal of Microelectronics and Computer Science
Dostawca treści:: Biblioteka Nauki

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