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    Wyświetlanie 1-5 z 5
    Tytuł:
    Analog Reconfirable Circuits
    Autorzy:
    Malcher, A.
    Falkowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/226956.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    analog signal processing
    configurable analog block
    CAB
    dynamic reconfiguration
    field programmable analog array
    FPAA
    switched capacitor circuits
    Opis:
    The aim of this paper is to present an overview of a new branch of analog electronics represented by analog reconfigurable circuits. The reconfiguration of analog circuits has been known and used since the beginnings of electronics, but the universal reconfigurable circuits called Field Programmable Analog Arrays (FPAA) have been developed over the last two decades. This paper presents the classification of analog circuit reconfiguration, examples of FPAA solutions obtained as academic projects and commercially available ones, as well as some application examples of the dynamic reconfiguration of FPAA.
    Źródło:
    International Journal of Electronics and Telecommunications; 2014, 60, 1; 15-26
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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
    Tytuł:
    Power-saving voltage-to-current conversion with the use of CMOS differential amplifier
    Autorzy:
    Wojtyna, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/398104.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
    Tematy:
    analog signal processing
    differential amplifier
    CMOS electronics
    low-power analog circuits
    analogowe przetwarzanie sygnałów
    wzmacniacz różnicowy
    CMOS
    obwody niskiego napięcia
    Opis:
    Differential amplifiers are well known as input stage preamplifiers. This is because they exhibit the ability to reduce unwanted common-mode effects considerably. As a consequence, both noise and input signal of the amplifier can have low values. Proper operation of differential amplifiers is possible when implemented in chip form. For typical use of such CMOS amplifiers, input signals are delivered to differential-pair gate-terminals while tail terminal is used to ensure the required bias of the pair. The paper shows that the roles of gates and tail terminal can be changed. In other words, the tail current can be used as input signal while the gate ones as voltages controlling the amplifier gain. This enables to combine the achievable low noise with power efficient operation of the circuit. Necessary conditions for that are discussed in this paper. Suitability of atypically used differential amplifiers for voltage-to-current conversion is explained. Two examples of CMOS circuits implementing power economic conversion of this type are presented.
    Źródło:
    International Journal of Microelectronics and Computer Science; 2015, 6, 3; 96-101
    2080-8755
    2353-9607
    Pojawia się w:
    International Journal of Microelectronics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Upgraded low voltage analog Current-to-Voltage converter with negative feedback
    Autorzy:
    Wojtyna, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/397781.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
    Tematy:
    analog signal processing
    current-to-voltage converters
    feedback theory
    analog CMOS electronics
    analogowe przetwarzanie sygnałów
    przetworniki prądowo-napięciowe
    teoria sprzężenia zwrotnego
    CMOS
    Opis:
    In this paper, an improved version of a current to voltage (C-V) converter is proposed. As compared to the previous version, the number of used transistors has been reduced by 1 and equals 7. The main results of this change are: an improvement of the circuit transfer function linearity, reduction the converter input resistance and decrease of the required supply voltage. Improvements in the considered converter results not only from the reduction of the number of the used transistors but also from the proposed realization of the feedback loop. In this way, it was possibly to get a strong loop gain. As a results, the achieved minimum supply voltage has been reduces from 2V, in case of the previous published converter version, to as low level as 1.2 V, in the case of the newly proposed solution. As for the linearity of the C-V transfer function, apart from its strong loop gain, an important role play also output transistors operating in a small drain to source region (linear region). Working in this region, one obtains a quasi linear voltage to current relationship. The theoretical and simulation results are in a good agreement and are promising.
    Źródło:
    International Journal of Microelectronics and Computer Science; 2017, 8, 2; 80-84
    2080-8755
    2353-9607
    Pojawia się w:
    International Journal of Microelectronics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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
      Wyświetlanie 1-5 z 5

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