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    Tytuł:
    Low Power, High Dynamic Range Analogue Multiplexer for Multi-Channel Parallel Recording of Neuronal Signals Using Multi-Electrode Arrays
    Autorzy:
    Rydygier, P.
    Dąbrowski, W.
    Fiutowski, T.
    Wiącek, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/226679.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    analogue multiplexer
    low power amplifier
    multi-channel electronics
    multielectrode arrays
    neural signal
    Opis:
    In the paper we present the design and test resultsof an integrated circuit combining a sample & hold circuit andan analogue multiplexer. The circuit has been designed as abuilding block for a multi-channel Application Specific IntegratedCircuit (ASIC) for recording signals from alive neuronal tissueusing high-density micro-electrode arrays (MEAs). The designis optimised with respect to critical requirements for suchapplications, i.e. short sampling time, low power dissipation, goodl inearity and high dynamic range. Presented design comprisessample&hold circuits with class AB operational amplifier, novelshift register, which allows minimising cross-coupling of the clocksignal and control logic. The circuit has been designed in 0.35µm CMOS process and has been successfully implemented in aprototype multi-channel ASIC.
    Źródło:
    International Journal of Electronics and Telecommunications; 2010, 56, 4; 399-404
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design and performance of a system for two - dimensional readout of gas electron multiplier detectors for proton range radiography
    Autorzy:
    Wiącek, P.
    Dąbrowski, W.
    Fiutowski, T.
    Mindur, B.
    Zielińska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/146722.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    front-end electronics
    GEM detectors
    2-D imaging
    proton range radiography
    Opis:
    The proton range radiography (PRR) technique being developed is expected to provide significant improvements in precision delivery of the therapeutic dose in the hadron therapy. The technique requires measuring residual energies and trajectories of mono-energetic protons passing through an object to be imaged. Such an imaging system can be operated in-situ before and after the treatment allowing real time monitoring of the irradiated tissue position. A detector system suitable for such applications must be capable of measuring proton tracks with submillimeter spatial resolution over area of 30 x 30 cm2. In order to limit the exposure time and obtain real-time images the detector and data acquisition must provide capability of measuring high proton rates up to 106 s-1. In this paper we present novel concept of two-dimensional (2-D) readout of the gas electron multiplier (GEM) detectors used as the position sensitive detectors. The key component of the system is an application specific integrated circuit (ASIC) named GEMROC. The GEMROC comprises 32 independent channels, each one capable of measuring the amplitude and the time of incoming signals. The positions are then reconstructed by coincidences of signals from the X- and Y-readout strips. The design and performance of the GEMROC ASIC are discussed and the results obtained for a test bench based on a smaller 10 x 10 cm2 GEM chamber are presented. The test results demonstrate clearly that with respect to the two critical parameters, i.e. the noise and the count rate capability, the developed readout system meets the requirements for clinical applications of the PRR technique.
    Źródło:
    Nukleonika; 2012, 57, 4; 513-519
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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