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Zobrazují se záznamy 1-20 z 177

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  • Multifunction RF Filters Using OTA 

    Herencsár, Norbert; Vrba, Kamil (Springer, 2007-09-03)
    In this paper the procedure of RF filter design using two active elements OTA is shown. The general method of filter design using OTA amplifiers, when the fully connected feedback network was designed around the two OTA ...
  • Videokonferenční technologie v praxi - Vidět a slyšet na dálku 

    Oujezský, Václav (Thomas Taylor s.r.o., 2008-01-20)
    Článek podrobně rozebírá problematiku videokonferenční technologie. Vysvětluje jednotlivé základní části použitých zařízení a skupin protokolů. V konečné části poskytuje přehled hardwarové a softwarové implementace ...
  • A Novel Current-Mode SIMO Type Universal Filter Using CFTAs 

    Herencsár, Norbert; Koton, Jaroslav; Vrba, Kamil; Mišurec, Jiří (Hikari Ltd., 2009-02-01)
    In this paper a new active element for the realization of current-mode analog blocks Current Follower Transconductance Amplifier (CFTA) is presented. The element is a combination of the Current Follower (CF) and the Balanced ...
  • New voltage-mode universal filter and sinusoidal oscillator using only single DBTA 

    Herencsár, Norbert; Koton, Jaroslav; Vrba, Kamil; Lattenberg, Ivo (Taylor & Francis, 2010-04-01)
    In this article, a new voltage-mode second-order universal frequency filter and sinusoidal oscillator using only single differential-input buffered and transconductance amplifier (DBTA) is presented. The proposed voltage-mode ...
  • Realisations of single-resistance-controlled quadrature oscillators using a generalised current follower transconductance amplifier and a unity-gain voltage-follower 

    Herencsár, Norbert; Vrba, Kamil; Koton, Jaroslav; Lahiri, Abhirup (Taylor & Francis, 2010-08-01)
    This article presents realisations of single-resistance-controlled-oscillators (SRCOs) using the recently proposed modern active building block (ABB), namely the generalised current follower transconductance amplifier ...
  • Real-Time Guitar Preamp Simulation Using Modified Blockwise Method and Approximations 

    Mačák, Jaromír; Schimmel, Jiří (Springer Nature, 2011-04-07)
    The designing of algorithms for real-time digital simulation of analog effects and amplifiers brings two contradictory requirements: accuracy versus computational efficiency. In this paper, the simulation of a typical ...
  • Goertzel Algorithm Generalized to Non-integer Multiples of Fundamental Frequency 

    Sysel, Petr; Rajmic, Pavel (SpringerOpen, 2012-03-22)
    The paper deals with the Goertzel algorithm, used to establish the modulus and phase of harmonic components of a signal. The advantages of the Goertzel approach over the DFT and the FFT in cases of a few harmonics of ...
  • An electronically tunable current-mode quadrature oscillator using PCAs 

    Herencsár, Norbert; Lahiri, Abhirup; Vrba, Kamil; Koton, Jaroslav (Taylor & Francis, 2012-04-10)
    The paper presents a new realization of active RC sinusoidal oscillator with electronically tunable condition and frequency of oscillation. As compared to the class of three resistors, two capacitors (3R-2C) based canonic ...
  • CMOS-based active RC sinusoidal oscillator with four-phase quadrature outputs and single-resistance-controlled (SRC) tuning laws 

    Lahiri, Abhirup; Herencsár, Norbert (Elsevier, 2012-09-07)
    This paper proposes a very compact CMOS realization of active RC sinusoidal oscillator capable of generating four quadrature voltage outputs. The oscillator is based on the cascade of lossless and lossy integrators in loop. ...
  • A Voltage Gain-Controlled Modified CFOA And Its Application in Electronically Tunable Four-Mode All-Pass Filter Design 

    Herencsár, Norbert; Koton, Jaroslav; Lahiri, Abhirup; Metin, Bilgin; Vrba, Kamil (International Science & Engineering Society, o.s., 2012-10-31)
    This paper presents a new active building block (ABB) called voltage gain-controlled modified current feedback amplifier (VGC-MCFOA) based on bipolar junction transistor technology. The versatility of the new ABB is ...
  • An Additional Approach to Model Current Followers and Amplifiers with Electronically Controllable Parameters from Commercially Available ICs 

    Šotner, Roman; Kartci, Aslihan; Jeřábek, Jan; Herencsár, Norbert; Dostál, Tomáš; Vrba, Kamil (Versita, 2012-11-22)
    Several behavioral models of current active elements for experimental purposes are introduced in this paper. These models are based on commercially available devices. They are suitable for experimental tests of current- ...
  • New Resistorless and Electronically Tunable Realization of Dual-Output VM All-Pass Filter Using VDIBA 

    Herencsár, Norbert; Minaei, Shahram; Koton, Jaroslav; Yuce, Erkan; Vrba, Kamil (Springer, 2013-01-07)
    In this paper, a new active element called voltage differencing inverting buffered amplifier (VDIBA) is presented. Using single VDIBA and a capacitor, a new resistorless voltage-mode (VM) first-order all-pass filter (APF) ...
  • Realization of first-order current-mode filters with low number of MOS transistors 

    Yuce, Erkan; Minaei, Shahram; Herencsár, Norbert; Koton, Jaroslav (World Scientific Publishing Company, 2013-01-14)
    In this paper, a new current-mode (CM) circuit for realizing all of the first-order filter responses is suggested. The proposed configuration contains low number of components, only two NMOS transistors both operating in ...
  • New resistorless tunable voltage-mode universal filter using single VDIBA 

    Herencsár, Norbert; Cicekoglu, Oguzhan; Šotner, Roman; Koton, Jaroslav; Vrba, Kamil (Springer, 2013-08-01)
    To increase the universality of the recently introduced voltage differencing inverting buffered amplifier (VDIBA), this letter presents a new voltage-mode (VM) multi-input–single-output (MISO) universal filter. The proposed ...
  • Komprimované snímání perfúzního zobrazování v MRI 

    Mangová, Marie; Rajmic, Pavel; Jiřík, Radovan (Společnost elektrotechnického inženýrství, 2013-11-20)
    Perfúzní zobrazování v MRI je lékařská diagnostická metoda, kdy pacientovi podáme kontrastní látku a poté průběžně sledujeme průběh její koncentrace v postižené oblasti. Tuto závislost můžeme přibližně matematicky popsat ...
  • TISO Adjustable Filter with Controllable Controlled-Gain Voltage Differencing Current Conveyor 

    Jeřábek, Jan; Šotner, Roman; Vrba, Kamil (Faculty of Electrical Engineering and Information Technology, Slovak University of Technology, 2014-06-02)
    The main aim of this paper is to present solution of triple-input single-output (TISO) filter with independently adjustable pole frequency, quality factor, bandwidth and also gain. Filter is universal, operates in current ...
  • Fully differential first-order allpass filters using a DDCC 

    Horng, Jiun-Wei; Wu, Chang-Ming; Herencsár, Norbert (NISCAIR-CSIR, 2014-08-01)
    Two voltage-mode high input impedance differential input-differential output first-order allpass filters based on differential difference current conveyor (DDCC) are presented. Each of the proposed circuit uses one plus-type ...
  • Three-input-one-output current-mode universal biquadratic filter using one differential difference current conveyor 

    Horng, Jiun-Wei; Wu, Chang-Ming; Herencsár, Norbert (NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR), 2014-08-01)
    A current-mode universal biquadratic filter is presented. The architecture has three input terminals, one output terminal using one differential difference current conveyor (DDCC), two grounded capacitors and two resistors. ...
  • Funkcionální analýza s aplikacemi ve zpracování signálů 

    Veselý, Vítězslav; Rajmic, Pavel (Vysoké učení technické v Brně, 2015-01-01)
    Látka je rozčleněna do sedmi kapitol s cílem podat ucelený výklad základů lineární funkcionální analýzy, který čtenáři umožní hlouběji pochopit matematickou podstatu a usnadnit tak následné studium podle aplikačního zaměření. ...
  • Distributed fiber-optic sensor for detection and localization of acoustic vibrations 

    Šifta, Radim; Münster, Petr; Sysel, Petr; Horváth, Tomáš; Novotný, Vít; Krajsa, Ondřej (Metrology and Measurement Systems, 2015-02-20)
    A sensing system utilizing the standard optical fiber as a distributed sensor for detection and localization of the mechanical vibrations is presented. Vibrations can be caused by various external factors like moving people, ...
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