Browsing 2008/4 by Issue Date

Now showing items 21-33 of 33

  • Characterization of Nonlinear Integrated Capacitors 

    Sutory, Tomas; Kolka, Zdenek (Společnost pro radioelektronické inženýrství, 2008-12)
    The paper deals with a modified CBCM (Charge-Based Capacitance Measurements) method for nonlinear capacitance characterization. The method is characterized by high resolution although it is based on equipment found in any ...

  • A New Application of Current Conveyors: The Design of Wideband Controllable Low-Noise Amplifiers 

    Godara, Balwant; Fabre, Alain (Společnost pro radioelektronické inženýrství, 2008-12)
    The aim of this paper is three-fold. First, it reviews the low-noise amplifier and its relevance in wireless communications receivers. Then it presents an exhaustive review of the existing topologies. Finally, it introduces ...

  • Numerical Modeling of Magnetic Field Deformation as Related to Susceptibility Measured with an MR System 

    Bartusek, Karel; Fiala, Pavel; Mikulka, Jan (Společnost pro radioelektronické inženýrství, 2008-12)
    The possibility is studied of numerical modeling of magnetic field deformations in the environment of measured diamagnetic and paramagnetic samples for the purposes of studying magnetic resonance (MR) image deformations ...

  • Active Elements for Analog Signal Processing: Classification, Review, and New Proposals 

    Biolek, Dalibor; Senani, Raj; Biolkova, Viera; Kolka, Zdenek (Společnost pro radioelektronické inženýrství, 2008-12)
    In the paper, an analysis of the state-of-the-art of active elements for analog signal processing is presented which support – in contrast to the conventional operational amplifiers – not only the voltage-mode but also the ...

  • A Monotonic Precise Current DAC for Sensor Applications 

    Horsky, Pavel (Společnost pro radioelektronické inženýrství, 2008-12)
    In this paper a 17 bit monotonic precise current DAC for sensor applications is described. It is working in a harsh automotive environment in a wide temperature range with high output voltage swing and low current consumption. ...

  • Synthesizing Sierpinski Antenna by Genetic Algorithm and Swarm Optimization 

    Vidal, Beatriz Maria; Raida, Zbynek (Společnost pro radioelektronické inženýrství, 2008-12)
    The paper discusses the synthesis of the Sierpinski antenna operating at three prescribed frequencies: 0.9 GHz, 1.8 GHz (both GSM) and 2.4 GHz (Bluetooth). In order to synthesize the antenna, a genetic algorithm and a ...

  • ACE Strategy with Virtual Channels 

    Vondrasek, Martin; Sovka, Pavel; Tichy, Tomas (Společnost pro radioelektronické inženýrství, 2008-12)
    Cochlear implant is an electronic device, which can mediate hearing sensations to profoundly deaf people. Contemporary cochlear implants are sophisticated electronic devices; however, their performance could still be ...

  • Adaptive Compensation of the Nonlinear Distortions in Optical Transmitters Using Predistortion 

    Panagiev, Oleg (Společnost pro radioelektronické inženýrství, 2008-12)
    The described method refers to compensation of nonlinear distortions, originating in laser diodes, used in wideband SCM-communication systems. Its essence is presenting in forming of a function that is opposite of the ...

  • Coexistence of Terrestrial and HAP 3G Networks during Disaster Scenarios 

    Holis, Jaroslav; Pechac, Pavel (Společnost pro radioelektronické inženýrství, 2008-12)
    The aim of this paper is to show the possible coexistence of an HAP and a terrestrial component of 3G networks at a single carrier frequency. The main goal is to compare the basic parameters of terrestrial and HAP com-ponent ...

  • Enhancement of Optical Coherence Tomography Images of the Retina by Normalization and Fusion 

    Rossant, Florence; Amiel, Frederic; Ea, Thomas; Martinez, C. Maraver; Paques, Michel (Společnost pro radioelektronické inženýrství, 2008-12)
    This paper describes an image processing method applied to Optical Coherence Tomography (OCT) images of the retina. The aim is to achieve improved OCT images from the fusion of sequential OCT scans obtained at identical ...

  • Wideband Phase Retrieval Technique from Amplitude-Only Near-Field Data 

    Costanzo, Sandra; Di Massa, Giuseppe (Společnost pro radioelektronické inženýrství, 2008-12)
    A wideband frequency behavior is demonstrated for a phaseless near-field technique of basically interferometric approach, which uses two identical probes interfering each other through a microstrip circuit and performing ...

  • Implementation and Evaluation of Power Consumption of an Iris Pre-processing Algorithm on Modern FPGA 

    Blasinsky, Henryk; Amiel, Frederic; Ea, Thomas; Rossant, Florence; Mikovicova, Beata (Společnost pro radioelektronické inženýrství, 2008-12)
    In this article, the efficiency and applicability of several power reduction techniques applied on a modern 65nm FPGA is described. For image erosion and dilation algorithms, two major solutions were tested and compared ...

  • Using Volterra Series for an Estimation of Fundamental Intermodulation Products 

    Dobes, Josef (Společnost pro radioelektronické inženýrství, 2008-12)
    The most precise procedure for determining the intermodulation products is to find a steady-state period of the signal first, and then to calculate its spectrum by means of the fast Fourier transform. However, this method ...