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Wyszukujesz frazę "substrate modeling" wg kryterium: Temat

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    Wyświetlanie 1-7 z 7
    Tytuł:
    SPICE simulation of passive N-type guard rings in smart power ICs
    Autorzy:
    Buccella, P.
    Stefanucci, C.
    Sallese, J.-M.
    Kayal, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/397726.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
    Tematy:
    substrate modeling
    noise coupling
    power parasitic modelling
    modelowanie substratów
    sprzężenie zakłóceń
    zasilanie pasożytnicze
    Opis:
    When designing in Smart Power technologies, TCAD simulations are mandatory to design effective passive protections against parasitic couplings due to minority carriers. The objective of this paper is to propose a SPICE-based approach to characterize electrical key parameters of a passive protection directly within standard IC design flow avoiding time consuming TCAD simulations. Our approach consists in integrating a new substrate model in SPICE to enable designers to derive themselves process specific design rules and reduce substrate couplings. This methodology enables designers to access valuable results in the early stage of IC design, where before such results could be obtained only in the final verification step.
    Źródło:
    International Journal of Microelectronics and Computer Science; 2015, 6, 2; 64-68
    2080-8755
    2353-9607
    Pojawia się w:
    International Journal of Microelectronics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On Rapid Re-Design of UWB Antennas with Respect to Substrate Permittivity
    Autorzy:
    Koziel, S.
    Bekasiewicz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/221869.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    antenna design
    geometry scaling
    simulation-driven optimization
    surrogate modeling
    inverse modeling
    substrate properties
    Opis:
    Re-design of a given antenna structure for various substrates is a practically important issue yet non trivial, particularly for wideband and ultra-wideband antennas. In this work, a technique for expedited redesign of ultra-wideband antennas for various substrates is presented. The proposed approach is based on inverse surrogate modeling with the scaling model constructed for several reference designs that are optimized for selected values of the substrate permittivity. The surrogate is set up at the level of coarse-discretization EM simulation model of the antenna and, subsequently, corrected to provide prediction at the high-fidelity EM model level. The dimensions of the antenna scaled to any substrate permittivity within the region of validity of the surrogate are obtained instantly, without any additional EM simulation necessary. The proposed approach is demonstrated using an ultra-wideband monopole with the permittivity scaling range from 2.2 to 4.5. Numerical validation is supported by physical measurements of the fabricated prototypes of the re-designed antennas.
    Źródło:
    Metrology and Measurement Systems; 2016, 23, 4; 513-520
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kinetic modelling of lovastatin biosynthesis by aspergillus terreus cultivated on lactose and glycerol as carbon sources
    Autorzy:
    Pawlak, M.
    Bizukojć, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/185729.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    lovastatin
    multi-substrate kinetics
    modeling
    batch bioreactor
    lowastatyna
    modelowanie
    bioreaktor
    Opis:
    A kinetic model to describe lovastatin biosynthesis by Aspergillus terreus ATCC 20542 in a batch culture with the simultaneous use of lactose and glycerol as carbon sources was developed. In order to do this the kinetics of the process was first studied. Then, the model consisting of five ordinary differential equations to balance lactose, glycerol, organic nitrogen, lovastatin and biomass was proposed. A set of batch experiments with a varying lactose to glycerol ratio was used to finally establish the form of this model and find its parameters. The parameters were either directly determined from the experimental data (maximum biomass specific growth rate, yield coefficients) or identified with the use of the optimisation software. In the next step the model was verified with the use of the independent sets of data obtained from the bioreactor cultivations. In the end the parameters of the model were thoroughly discussed with regard to their biological sense. The fit of the model to the experimental data proved to be satisfactory and gave a new insight to develop various strategies of cultivation of A. terreus with the use of two substrates.
    Źródło:
    Chemical and Process Engineering; 2012, 33, 4; 651-665
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    SAW sensor for detection of hydrocarbons. Numerical analysis and experimental results
    Autorzy:
    Hejczyk, T.
    Urbańczyk, M.
    Wituła, R.
    Maciak, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/201623.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    SAW
    gas sensor
    piezoelectric substrate
    Ingebrigtsen's formula
    impedance transformation law
    numerical modeling
    Opis:
    The paper presents the results of numerical analyses of the SAW gas sensor in the steady and non-steady state. The effect of SAW velocity changes vs. the surface electrical conductivity of the sensing layer is predicted. The conductivity of the porous sensing layer above the piezoelectric waveguide depends on the profile of the diffused gas molecule concentration inside the layer. Knudsen's model of gas diffusion was used. Numerical results for the gases CH4, C2H4, C3H8, C6H6 in the steady state and CH4 in the non-steady state in the WO3 sensing layer have been shown. The results of numerical analyzes allow to select the sensor design conditions, including the morphology of the sensor layer, its thickness and operating temperature. Some numerical results were verified in experimental studies concerning methane.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2012, 60, 3; 589-595
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Numerical and Experimental Analysis of the Response of a SAW Structure with WO3 Layers on Action of Carbon Monoxide
    Autorzy:
    Hejczyk, T.
    Urbańczyk, M.
    Pustelny, T.
    Jakubik, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/176885.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    gas sensor
    carbon monoxide (CO)
    piezoelectric substrate
    numerical modeling
    surface acoustic waves
    acoustoelectric effects
    Ingebrigtsen's formula
    Opis:
    The paper presents the results of an analysis of gaseous sensors based on a surface acoustic wave (SAW) by means of the equivalent model theory. The applied theory analyzes the response of the SAW sensor in the steady state affected by carbon monoxide (CO) in air. A thin layer of WO3 has been used as a sensor layer. The acoustical replacing impedance of the sensor layer was used, which takes into account the profile of the concentration of gas molecules in the layer. Thanks to implementing the Ingebrigtsen equation, the authors determined analytical expressions for the relative changes of the velocity of the surface acoustic wave in the steady state. The results of the analysis have shown that there is an optimum thickness of the layer of CO sensor at which the acoustoelectric effect (manifested here as a change in the acoustic wave velocity) is at its highest. The theoretical results were verified and confirmed experimentally.
    Źródło:
    Archives of Acoustics; 2015, 40, 1; 19-24
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Automated substrate resistance extraction in nanoscale VLSI by exploiting a geometry-based analytical model
    Autorzy:
    Bontzios, Y. I.
    Dimopoulos, M. G.
    Hatzopoulos, A. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/398110.pdf
    Data publikacji:
    2011
    Wydawca:
    Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
    Tematy:
    szum podłożowy
    układ scalony
    modelowanie geometryczne
    pochodzenie oporu
    modelowanie oporu
    zasilanie pasożytnicze
    substrate noise
    integrated circuits
    geometric modeling
    resistance extraction
    resistance modeling
    parasitics
    Opis:
    In this work, a new automated method for determining the substrate resistance is presented. It exploits a geometric formulation of the current streamlines between coupled structures and builds an analytical model for the substrate resistance. Both simulation and measurement data are utilized in order to show the validity of the proposed scheme. The measurement data are obtained from a fabricated test chip. The results show that the proposed method succeeds in computing the substrate resistance while the average error falls within 5%.
    Źródło:
    International Journal of Microelectronics and Computer Science; 2011, 2, 3; 81-87
    2080-8755
    2353-9607
    Pojawia się w:
    International Journal of Microelectronics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spice simulation of substrate potential shift in HVCMOS technologies
    Autorzy:
    Stefanucci, C.
    Buccella, P.
    Kayal, M.
    Sallese, J.-M.
    Powiązania:
    https://bibliotekanauki.pl/articles/397879.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
    Tematy:
    Smart Power ICs
    HVCMOS modeling
    vertical bipolar transistor
    substrate potential shift
    Smart Power
    modelowanie HVCMOS
    pionowy tranzystor bipolarny
    Opis:
    High voltage CMOS active devices inherently include a parasitic vertical PNP bipolar transistor. When activated it injects holes into the substrate causing a dangerous potential shift. In this work a spice-modeling approach based on transistor layout is presented to simulate substrate de-biasing in Smart Power ICs. The proposed model relies on a parasitic substrate network without the need of a parasitic BJT in HVCMOS compact models. The results are compared with TCAD simulations at different temperatures showing good agreement. Potential shift of the substrate is analysed for different geometrical configurations to estimate the effect of P+ grounding schemes and backside contact.
    Źródło:
    International Journal of Microelectronics and Computer Science; 2015, 6, 4; 142-147
    2080-8755
    2353-9607
    Pojawia się w:
    International Journal of Microelectronics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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