• 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, ...
  • Comparative Study of Discrete Component Realizations of Fractional-Order Capacitor and Inductor Active Emulators 

    Tsirimokou, Georgia; Kartci, Aslihan; Koton, Jaroslav; Herencsár, Norbert; Psychalinos, Costas (World Scientific, 2018-02-06)
    Due to the absence of commercially available fractional-order capacitors and inductors, their implementation can be performed using fractional-order differentiators and integrators, respectively, combined with a ...
  • 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 Resource Sharing in 5G with LSA: Criteria-Based Management Framework 

    Sadreddini, Zhaleh; Mašek, Pavel; Cavdar, Tugrul; Hošek, Jiří; Gudkova, Irina; Andreev, Sergey (Hindawi, 2018-03-30)
    Owing to a steadily increasing demand for efficient spectrum utilization as part of the fifth-generation (5G) cellular concept, it becomes crucial to revise the existing radio spectrum management techniques and provide ...
  • 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 ...
  • Electromagnetic compatibility of PLC adapters for in-home/domestic networks 

    Orgoň, Miloš; Fujdiak, Radek (Faculty of Electrical Engineering and Information Technology of the Slovak University of Technology, 2018-02-19)
    The use of programable logic controllers (PLC) technology in electrical networks 230 V causes electromagnetic radiation that interferes with other electrical equipment connected to the network. Therefore, this article ...
  • 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, 2017-05-26)
    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 ...
  • Fully-Differential Universal Frequency Filter with Dual-Parameter Control of the Pole Frequency and Quality Factor 

    Langhammer, Lukáš; Šotner, Roman; Dvořák, Jan; Jeřábek, Jan; Zapletal, Miroslav (IEEE, 2018-05-30)
    The paper presents a proposal of modified 2ndorder fully-differential universal frequency filter. Both the pole frequency and quality factor (controlled without disturbing each other) of the filter can be controlled by two ...