• 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- ...
  • Behavioral model for emulation of ZC-CG-VDCC 

    Jeřábek, Jan; Šotner, Roman; Herencsár, Norbert; Vrba, Kamil; Dostál, Tomáš (The Institute of Electronics, Information and Communication Engineers (IEICE), 2016-01-29)
    This paper presents a proposal and an experimental analysis of behavioral emulator of so-called z-copy controlled-gain voltage differencing current conveyor (ZC-CG-VDCC) based on commercially available devices. Most of ...
  • Botnet C&C Traffic and Flow Lifespans Using Survival Analysis 

    Oujezský, Václav; Horváth, Tomáš; Škorpil, Vladislav (International Science and Engineering Society, o.s., 2017-03-27)
    This paper addresses the issue of detecting unwanted traffic in data networks, namely the detection of botnet networks. In this paper, we focused on a time behavioral analysis, more specifically said – lifespans of a ...
  • A CMOS Multiplied Input Differential Difference Amplifier: A New Active Device and Its Applications 

    Šotner, Roman; Jeřábek, Jan; Prokop, Roman; Kledrowetz, Vilém; Polák, Josef (MDPI AG, 2017-01-26)
    This paper presents a newly developed active device, referred to as a multiplied input differential difference amplifier (MIDDA), which allows operations of summation/subtraction and multiplication of input signals. It was ...
  • 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. ...
  • Compact MOS-RC Voltage-Mode Fractional-Order Oscillator Design 

    Kartci, Aslihan; Herencsár, Norbert; Koton, Jaroslav; Psychalinos, Costas (IEEE, 2017-09-04)
    A new voltage-mode fractional-order oscillator, employing in total 12 Metal-Oxide-Semiconductor (MOS) transistors, is introduced in this paper. The proposed circuit is composed of two operational transconductance amplifiers, ...
  • Comparison of Bit Error Rate of Line Codes in NG-PON2 

    Horváth, Tomáš; Fujdiak, Radek; Čučka, Milan; Mišurec, Jiří; Mangová, Marie (IJATES, 2016-05-31)
    This article focuses on simulation and comparison of line codes NRZ (Non Return to Zero), RZ (Return to Zero) and Miller’s code for NG-PON2 (Next-Generation Passive Optical Network Stage 2) using.
  • Design of the simple oscillator with linear tuning and pi/4 phase shift based on emulator of the modified current differencing unit 

    Šotner, Roman; Jeřábek, Jan; Herencsár, Norbert; Vrba, Kamil (The Institute of Electronics, Information and Communication Engineers (IEICE), 2015-10-10)
    This paper presents a simple oscillator with 45 degrees phase shift between output signals. A Modified current Differencing Unit (MCDU) was used for its design. The MCDU offers controllability of input resistances ...
  • Digitally Controllable Current Amplifier and Current Conveyors in Practical Application of Controllable Frequency Filter 

    Polák, Josef; Jeřábek, Jan; Langhammer, Lukáš; Šotner, Roman; Dvořák, Jan; Pánek, David (Faculty of Electrical Engineering and Information Technology, Slovak University of Technology, 2016-09-04)
    This paper presents the simulations results in comparison with the measured results of the practical realization of the multifunctional second order frequency filter with a Digitally Controlled Current Amplifier (DACA) and ...
  • 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, ...
  • Dual-parameter control of the pole frequency in case of universal filter with MCDU elements 

    Jeřábek, Jan; Šotner, Roman; Herencsár, Norbert; Polák, Josef; Dvořák, Jan; Koton, Jaroslav (Springer, 2016-12-01)
    This paper presents an universal filter with control of the pole frequency by two mutually independent parameters - current gain (B) and intrinsic resistance (R x) in frame of two modified current differencing unit (MCDU) ...
  • Dynamic Trust Associations over Socially-Aware D2D Technology: A Practical Implementation Perspective 

    Ometov, Aleksandr; Olshannikova, Ekaterina; Mašek, Pavel; Olsson, Thomas; Hošek, Jiří; Andreev, Sergey; Koucheryavy, Yevgeni (IEEE Access, 2016-10-20)
    Today, direct contacts between users are being facilitated by the network-assisted device-to-device (D2D) technology, which employs the omnipresent cellular infrastructure for the purposes of control to facilitate advanced ...
  • 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 ...
  • Evaluation of Device-Independent Internet Spatial Location 

    Komosný, Dan; Pang, Shaoning; Mehic, Miralem; Vozňák, Miroslav (MDPI AG, 2017-05-27)
    Device-independent Internet spatial location is needed for many purposes, such as data personalisation and social behaviour analysis. Internet spatial databases provide such locations based the IP address of a device. The ...
  • Fractional-Order Oscillator Design Using Unity-Gain Voltage Buffers and OTAs 

    Kartci, Aslihan; Herencsár, Norbert; Koton, Jaroslav; Brančík, Lubomír; Vrba, Kamil; Tsirimokou, Georgia; Psychalinos, Costas (IEEE, 2017-08-06)
    In this study, a new voltage-mode fractional-order oscillator using two unity-gain voltage buffers, two operational transconductance amplifiers, one resistor, and two capacitors is presented. The design procedure of ...
  • 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 ...
  • 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. ...
  • A Harmonized Perspective on Transportation Management in Smart Cities: The Novel IoT-Driven Environment for Road Traffic Modeling 

    Mašek, Pavel; Mašek, Jan; Frantík, Petr; Fujdiak, Radek; Ometov, Aleksandr; Hošek, Jiří; Andreev, Sergey; Mlýnek, Petr; Mišurec, Jiří (MDPI, 2016-11-08)
    The unprecedented growth of today’s cities together with increased population mobility are fueling the avalanche in the numbers of vehicles on the roads. This development led to the new challenges for the traffic management, ...
  • High input impedance voltage-mode universal filter and its modification as quadrature oscillator using VDDDAs 

    Tuntrakool, Sunti; Kumngern, Montree; Šotner, Roman; Herencsár, Norbert; Suwanjan, Peerawut; Jaikla, Winai (NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR), 2017-05-23)
    The second order universal voltage-mode filter using voltage differencing differential difference amplifiers (VDDDAs) has been proposed. It has high input impedance voltage-mode biquad filter with orthogonal tune of natural ...
  • History, Progress and New Results in Synthetic Passive Element Design Employing CFTAs 

    Koton, Jaroslav; Herencsár, Norbert; Venclovský, Martin (International Society for Science and Engineering, 2015-03-31)
    After the presentation of the Current Follower Transconductance Amplifier (CFTA) active element, it has found a numerous application possibilities while designing linear and non-linear analog function blocks. This paper ...