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    Wyświetlanie 1-4 z 4
    Tytuł:
    Switched Current Sigma-Delta Modulator with a New Comparator Structure Designed Based on VHDL-AMS Description
    Autorzy:
    Śniatała, P
    Handkiewicz, A
    Naumowicz, M.
    Szczęsny, S.
    Melosik, M.
    Katarzyński, P.
    Kropidłowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/227188.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    switched current
    VHDL-AMS
    sigma-delta modulator
    Opis:
    The paper presents a VHDL-AMS based approach to the Switched-Current (SI) Sigma-Delta Modulator design. The prototype VHDL-AMS description, with the help of elaborated EDA tools, is automatically translated into the SI realization. Another tool helps the designer to create the layout. The paper also describes a new current mode comparator, which is used in the design. Postlayout simulation results are presented.
    Źródło:
    International Journal of Electronics and Telecommunications; 2013, 59, 4; 391-396
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An active power filter based on a hybrid converter topology – Part 1
    Autorzy:
    Gwóźdź, Michał
    Ciepliński, Łukasz
    Powiązania:
    https://bibliotekanauki.pl/articles/2090725.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    shunt active power filter
    pulse width modulation
    PWM
    sigma-delta modulator
    silicon carbide
    bocznikowy filtr mocy czynnej
    modulacja szerokości impulsu
    modulator sigma-delta
    węglik krzemu
    Opis:
    This paper presents a concept of a shunt active power filter, which is able to provide more precise mapping of its input current drawn from a power line in a reference signal, as compared to a typical filter solution. It can be achieved by means of an interconnection of two separate power electronics converters making, as a whole, a controlled current source, which mainly determines the quality of the shunt active filter operation. One of these power devices, the “auxiliary converter”, corrects the total output current, being a sum of output currents of both converters, toward the reference signal. The rated output power of the auxiliary converter is much lower than the output power of the main one, while its frequency response is extended. Thanks to both these properties and the operation of the auxiliary converter in a continuous mode, pulse modulation components in the filter input current are minimized. Benefits of the filter are paid for by a relatively small increase in the complexity and cost of the system. The proposed solution can be especially attractive for devices with higher output power, where, due to dynamic power loss in power switches, a pulse modulation carrier frequency must be lowered, leading to the limitation of the “frequency response” of the converter. The concept of such a system was called the “hybrid converter topology”. In the first part of the paper, the rules of operation of the active filter based on this topology are presented. Also, the results of comparative studies of filter simulation models based on both typical, i.e. single converter, and hybrid converter topologies, are discussed.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 1; e136218, 1--10
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An active power filter based on a hybrid converter topology – Part 1
    Autorzy:
    Gwóźdź, Michał
    Ciepliński, Łukasz
    Powiązania:
    https://bibliotekanauki.pl/articles/2173586.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    shunt active power filter
    pulse width modulation
    PWM
    sigma-delta modulator
    silicon carbide
    bocznikowy filtr mocy czynnej
    modulacja szerokości impulsu
    modulator sigma-delta
    węglik krzemu
    Opis:
    This paper presents a concept of a shunt active power filter, which is able to provide more precise mapping of its input current drawn from a power line in a reference signal, as compared to a typical filter solution. It can be achieved by means of an interconnection of two separate power electronics converters making, as a whole, a controlled current source, which mainly determines the quality of the shunt active filter operation. One of these power devices, the “auxiliary converter”, corrects the total output current, being a sum of output currents of both converters, toward the reference signal. The rated output power of the auxiliary converter is much lower than the output power of the main one, while its frequency response is extended. Thanks to both these properties and the operation of the auxiliary converter in a continuous mode, pulse modulation components in the filter input current are minimized. Benefits of the filter are paid for by a relatively small increase in the complexity and cost of the system. The proposed solution can be especially attractive for devices with higher output power, where, due to dynamic power loss in power switches, a pulse modulation carrier frequency must be lowered, leading to the limitation of the “frequency response” of the converter. The concept of such a system was called the “hybrid converter topology”. In the first part of the paper, the rules of operation of the active filter based on this topology are presented. Also, the results of comparative studies of filter simulation models based on both typical, i.e. single converter, and hybrid converter topologies, are discussed.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 1; art. no. e136218
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sampling Jitter in Audio A/D Converters
    Autorzy:
    Kulka, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/177046.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    analog-to-digital converter
    ADC
    successive approximation register (SAR)
    sigma-delta ADC
    sample-and-hold circuit
    DT sigma delta modulator
    CT sigma delta modulator
    time jitter
    aperture jitter
    clock jitter
    periodic clock jitter
    signal-to-noise ratio (SNR)
    Opis:
    This paper provides an overview of the effects of timing jitter in audio sampling analog-to-digital converters (ADCs), i.e. PCM (conventional or Nyquist sampling) ADCs and sigma-delta (ΣΔ) ADCs. Jitter in a digital audio is often defined as short- term fluctuations of the sampling instants of a digital signal from their ideal positions in time. The influence of the jitter increases particularly with the improvements in both resolution and sampling rate of today’s audio ADCs. At higher frequencies of the input signals the sampling jitter becomes a dominant factor in limiting the ADCs performance in terms of signal-to-noise ratio (SNR) and dynamic range (DR).
    Źródło:
    Archives of Acoustics; 2011, 36, 4; 831-849
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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