Now showing items 16-35 of 94

  • Design and Analysis of CCII-Based Oscillator with Amplitude Stabilization Employing Optocouplers for Linear Voltage Control of the Output Frequency 

    Šotner, Roman; Jeřábek, Jan; Langhammer, Lukáš; Dvořák, Jan (MDPI, 2018-08-22)
    This paper shows the topology design of a simple second-order oscillator based on two three-port current conveyors, two resistors, and two grounded capacitors, as well as its modification to a voltage-controlled oscillator ...
  • Design of Fractional-Order Integrator Controlled by Single Voltage Gain 

    Šotner, Roman; Petržela, Jiří; Jeřábek, Jan; Herencsár, Norbert; Andriukaitis, Darius (IEEE, 2019-07-01)
    This work presents analyses of interaction of fractional- and integer-order transfer functions when their responses are added together by simple linear operation of sum. The mathematical background is very complex but ...
  • 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, ...
  • Distributed Sensing Based on Interferometry and Polarization Methods for Use in Fibre Infrastructure Protection 

    Münster, Petr; Horváth, Tomáš; Vojtěch, Josef (MDPI, 2019-04-16)
    Fibre optic infrastructures are very important, and therefore, it is necessary to protect them from fibre cuts. Most fibre cuts are caused by digging activity, and many network operators seek appropriate solutions enabling ...
  • 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 ...
  • Electronically Reconfigurable Universal Filter Based on VDTAs 

    Langhammer, Lukáš; Šotner, Roman; Domanský, Ondřej; Hricko, Tomáš (IEEE, 2018-04-19)
    The proposed filter extends features of the previously presented Voltage Differencing Transconductance Amplifiers (VDTAs)-based frequency filter. It brings the new advantage of an electronic reconfiguration of its transfer. ...
  • 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 Hartley Oscillator 

    Agambayev, Agamyrat; Kartci, Aslihan; Hassan, Ali H.; Herencsár, Norbert; Bagci, Hakan; Salama, Khaled Nabil (IEEE, 2018-07-02)
    A fractional-order capacitor (FOC) is developed using a Molybdenum disulfide ferroelectric polymer composite. The fabricated FOC exhibits constant phase over five decades between 100 Hz-10 MHz, which is the broadest operating ...
  • Fractional-Order Low-Pass Filter with Electronic Tunability of Its Order and Pole Frequency 

    Langhammer, Lukáš; Dvořák, Jan; Jeřábek, Jan; Koton, Jaroslav; Šotner, Roman (FEI STU Bratislava, 2018-02-27)
    This paper presents novel solution of a fractional-order low-pass filter (FLPF). The proposed filter operates in the current mode and it is designed using third-order inverse follow-the-leader feedback topology and operational ...
  • 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 ...
  • 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. ...
  • 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 ...