Temat: analog signal - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Metal detector excited by frequency-swept signal
Autorzy:: Svatoš, J.
Vedral, J.
Fexa, P.
Powiązania:: https://bibliotekanauki.pl/articles/221024.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: metal detection
polyharmonic signals
Frequency Sweep
modelling of electromagnetic induction
analog signal processing
Opis:: This paper describes the theoretical background of electromagnetic induction from metal objects modelling. The response function of a specific case of object shape - a homogenous sphere from ferromagnetic and nonferromagnetic material is introduced. Experimental data measured by a metal detector excited with a linearly frequency-swept signal are presented. As a testing target various spheres from different materials and sizes were used. These results should lead to better identification of the buried object.
Źródło:: Metrology and Measurement Systems; 2011, 18, 1; 57-67
0860-8229
Pojawia się w:: Metrology and Measurement Systems
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Analytical synthesis of parameter-varying filter of constant component with application to switching systems
Autorzy:: Piskorowski, J.
Kaszyński, R.
Powiązania:: https://bibliotekanauki.pl/articles/221736.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: data acquisition
analog signal processing
transient behavior
dynamics
switching systems
linear parameter-varying technique (LPV)
linear time-varying systems (LTV)
Opis:: In this paper, we propose a concept of a continuous-time filter of constant component that exhibits a very short response in the time domain if compared to the traditional time-invariant filter. The improvement of the filter dynamics was achieved as a result of the time-varying parameters which were introduced to the filter structure. Such a designed filter is then applied in a system which switches many distorted signals which should be filtered as fast as possible. The paper is of review nature and presents both a theoretical background of the proposed filter and the results of simulations.
Źródło:: Metrology and Measurement Systems; 2011, 18, 3; 471-480
0860-8229
Pojawia się w:: Metrology and Measurement Systems
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: DAC testing using modulated signals
Autorzy:: Fexa, P.
Verdal, J.
Svatoš, J.
Powiązania:: https://bibliotekanauki.pl/articles/220431.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: digital-to-analog converter
ENOB
Signal-to-noise and distortion - SINAD
FFT analysis
Crest Factor (CF)
Opis:: This document analyses qualities of methods used for testing dynamical parameters of Digital-to-Analog Converters (DAC) using a multi-frequency signal. As the source for these signals, Amplitude Modulated (AM) and Frequency Modulated (FM) signals are used. These signals are often used in radio engineering. Results of the tests, like Effective Number of Bits (ENOB), Signal-to-Noise and Distortion (SINAD), are evaluated in the frequency domain and they are compared with standard results of Sine Wave FFT test methods. The aim of this research is firstly to test whether it is possible to test a DAC using modulated signals, secondly to reduce testing time, while estimating band performance of DAC.
Źródło:: Metrology and Measurement Systems; 2011, 18, 2; 283-293
0860-8229
Pojawia się w:: Metrology and Measurement Systems
Dostawca treści:: Biblioteka Nauki

Artykuł

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