Browsing 2011/1 by Issue Date

Now showing items 1-20 of 55

  • Four-Phase Oscillators Employing Two Active Elements 

    Biolková, Viera; Bajer, J.; Biolek, Dalibor (Společnost pro radioelektronické inženýrství, 2011-04)
    Two novel four-phase voltage-output oscillators are proposed. These circuits can also be utilized as quadrature oscillators with floating outputs. Each oscillator employs two DO-CIBA (Differential Output- Current Inverter ...

  • Planar Millimeter-Wave Antennas: A Comparative Study 

    Pítra, Kamil; Raida, Zbyněk (Společnost pro radioelektronické inženýrství, 2011-04)
    The paper describes the design and the experimental verification of three types of wideband antennas. Attention is turned to the bow-tie antenna, the Vivaldi antenna and the spiral antenna designed for the operation at ...

  • Current-Mode CCII+ Based Oscillator Circuits using a Conventional and a Modified Wien-Bridge with All Capacitors Grounded 

    Bajer, J.; Lahiri, A.; Biolek, Dalibor (Společnost pro radioelektronické inženýrství, 2011-04)
    The paper deals with a pair of current-mode sine-wave oscillator circuits. Both these circuits are implemented using positive second-generation current conveyors (CCII+). The principle of the first oscillator is based on ...

  • Topology Reduction for Approximate Symbolic Analysis 

    Kolka, Zdeněk; Vlk, Martin; Horák, Martin (Společnost pro radioelektronické inženýrství, 2011-04)
    The paper deals with a procedure for approximate symbolic analysis of linear circuits based on simplifying the circuit model. The procedure consists of two main steps. First, network elements whose influence on the circuit ...

  • Behavioral Modeling of Memcapacitor 

    Biolek, Dalibor; Biolek, Zdeněk; Biolková, Viera (Společnost pro radioelektronické inženýrství, 2011-04)
    Two behavioral models of memcapacitor are developed and implemented in SPICE-compatible simulators. Both models are related to the charge-controlled memcapacitor, the capacitance of which is controlled by the amount of ...

  • Rural Optical-Propagation Measurements 

    Epple, B.; Henniger, H.; Kurz, S.; Haan, H. (Společnost pro radioelektronické inženýrství, 2011-04)
    Compared with traditional communication technologies like wired or radio frequency communications, optical wireless communication has a unique fading behavior of the received signal, that does not allow to use existing ...

  • Tag Anti-collision Algorithm for RFID Systems with Minimum Overhead Information in the Identification Process 

    Mohammed, Usama S.; Salah, Mostafa (Společnost pro radioelektronické inženýrství, 2011-04)
    This paper describes a new tree based anti-collision algorithm for Radio Frequency Identification (RFID) systems. The proposed technique is based on fast parallel binary splitting (FPBS) technique. It follows a new ...

  • Elliptic and Hyperbolic Dielectric Lens Antennas in mm-Waves 

    Piksa, P.; Zvanovec, S.; Cerny, P. (Společnost pro radioelektronické inženýrství, 2011-04)
    Dielectric lenses can substantially improve antenna parameters, especially the planarity of radiated waves and the antenna gain. The paper deals with their application in millimeter-wave band. The main goal concerns the ...

  • Design of Discrete Frequency Coded Sequences using PSOCM for Target Detection with CAF 

    Rao, M. V. N.; Rajeswari, K. R. (Společnost pro radioelektronické inženýrství, 2011-04)
    This paper presents the design of Discrete Frequency Coded (DFC) sequences with good auto correlation properties using Particle Swarm Optimization with Cauchy Mutation (PSOCM) technique. The crossambiguity function method ...

  • Optimization of Wavelet-Based De-noising in MRI 

    Bartusek, K.; Prinosil, J.; Smekal, Z. (Společnost pro radioelektronické inženýrství, 2011-04)
    In the paper, a method for MR image enhancement using the wavelet analysis is described. The wavelet analysis is concentrated on the influence of threshold level and mother wavelet choices on the resultant MR image. The ...

  • Computer Simulation of Nonuniform MTLs via Implicit Wendroff and State-Variable Methods 

    Brancik, L.; Sevcik, B. (Společnost pro radioelektronické inženýrství, 2011-04)
    The paper deals with techniques for a computer simulation of nonuniform multiconductor transmission lines (MTLs) based on the implicit Wendroff and the statevariable methods. The techniques fall into a class of finitedifference ...

  • Electrical and optical study of transparent V-based oxide semiconductors prepared by magnetron sputtering under different conditions 

    Prociow, E.; Zielinski, M.; Sieradzka, K.; Domaradzki, J.; Kaczmarek, D. (Společnost pro radioelektronické inženýrství, 2011-04)
    This work is focused on structural, optical and electrical behaviors of vanadium-based oxide thin films prepared by magnetron sputtering under different conditions. Thin films have been deposited on glass substrates from ...

  • Recognition of Emotions in Czech Newspaper Headlines 

    Burget, R.; Karasek, J.; Smekal, Z. (Společnost pro radioelektronické inženýrství, 2011-04)
    With the growth of internet community, many different text-based documents are produced. Emotion detection and classification in text becomes very important in human-machine interaction or in human-to-human internet ...

  • Testing of PLL-based True Random Number Generator in Changing Working Conditions 

    Simka, M.; Drutarovsky, M.; Fischer, V. (Společnost pro radioelektronické inženýrství, 2011-04)
    Security of cryptographic systems depends significantly on security of secret keys. Unpredictability of the keys is achieved by their generation by True Random Number Generators (TRNGs). In the paper we analyze behavior ...

  • Current and Voltage Conveyors in Current- and Voltage-Mode Precision Full-Wave Rectifiers 

    Koton, J.; Herencsar, N.; Vrba, K. (Společnost pro radioelektronické inženýrství, 2011-04)
    In this paper new versatile precision full-wave rectifiers using current and/or voltage conveyors as active elements and two diodes are presented. The performance of these circuit solutions is analysed and compared to the ...

  • Deriving (MO)(I)CCCII Based Second-order Sinusoidal Oscillators with Non-interactive Tuning Laws using State Variable Method 

    Lahiri, A. (Společnost pro radioelektronické inženýrství, 2011-04)
    The paper discusses systematic realization of second-order sinusoidal oscillators using multiple-output second-generation current controlled conveyor (MO-CCCII) and/or its inverting equivalent, namely the multiple-output ...

  • Activation Energy of RTS Noise 

    Pavelka, J.; Sikula, J.; Tacano, M.; Toita, M. (Společnost pro radioelektronické inženýrství, 2011-04)
    Low frequency noise was measured in silicon MOSFET and GaN and InGaAs based HFET devices with special emphasis on the RTS noise. The RTS (Random Telegraph Signal) dependence on the biasing conditions and temperature was ...

  • Arbitrary Shape Electromagnetic Transparent Device Based on Laplace’s Equation 

    Jing-jing Yang; Ming Huang; Cheng-fu Yang; Ji-hong Shi (Společnost pro radioelektronické inženýrství, 2011-04)
    Transparent device is deliberately-designed electromagnetic structure that is transparent to electromagnetic wave. It can be used as a radome structure which is capable of protection antenna inside without sacrificing its ...

  • Solar Power Station Output Inverter Control Design 

    Bauer, J.; Lettl, J. (Společnost pro radioelektronické inženýrství, 2011-04)
    The photovoltaic applications spreads in these days fast, therefore they also undergo great development. Because the amount of the energy obtained from the panel depends on the surrounding conditions, as intensity of the ...

  • Guest Editorial IMAPS Electronic Devices and Systems International Conference, 2010 

    Haze, J. (Společnost pro radioelektronické inženýrství, 2011-04)