Browsing 2013/1 by Title

Now showing items 1-20 of 52

  • 0.5V 3rd-order Tunable gm-C Filter 

    Arya, Richa; Souliotis, George; Vlassis, Spyros; Psychalinos, Costas (Společnost pro radioelektronické inženýrství, 2013-04)
    This paper proposes a 3rd-order gm-C filter that operates with the extremely low voltage supply of 0.5V. The employed transconductor is capable for operating in an extremely low voltage power supply environment. A benefit ...

  • 3D Energy Harvester Evaluation 

    Janicek, Vladimir; Husak, Miroslav (Společnost pro radioelektronické inženýrství, 2013-04)
    This paper discusses the characterization and evaluation of an MEMS based electrostatic generator, a part of the power supply unit of the self-powered microsystem[1,2,3]. The designed generator is based on electrostatic ...

  • 3D Reconstruction: Novel Method for Finding of Corresponding Points using Pseudo Colors 

    Bolecek, Libor; Ricny, Vaclav; Slanina, Martin (Společnost pro radioelektronické inženýrství, 2013-04)
    This paper deals with the reconstruction of spatial coordinates of an arbitrary point in a scene using two images scanned by a 3D camera or two displaced cameras. Calculations are based on the perspective geom-etry. Accurate ...

  • Acoustic Echo and Noise Cancellation System for Hand-Free Telecommunication using Variable Step Size Algorithms 

    Gupta, V. K.; Chandra, Mahesh; Sharan, S. N. (Společnost pro radioelektronické inženýrství, 2013-04)
    In this paper, acoustic echo cancellation with doubletalk detection system is implemented for a hand-free telecommunication system using Matlab. Here adaptive noise canceller with blind source separation (ANC-BSS) system ...

  • Analytical Computation of the Area of Pinched Hysteresis Loops of Ideal Mem-Elements 

    Biolek, Zdenek; Biolek, Dalibor; Biolkova, Viera (Společnost pro radioelektronické inženýrství, 2013-04)
    The memory elements, memristor being the best known of them, driven by a periodical waveform exhibit the well-known pinched hysteresis loops. The hysteresis is caused by a memory effect which results in a nonzero area ...

  • Application of Fiber Ring for Protection of Passive Optical Infrastructure 

    Lafata, Pavel; Vodrazka, Jiri (Společnost pro radioelektronické inženýrství, 2013-04)
    Today, passive optical networks (PONs) are mostly used as modern high-speed access networks for various applications. However, there are also several specific applications, such as in business, office, army or science ...

  • Biquadratic Filter Applications Using a Fully-Differential Active-Only Integrator 

    Yildiz, Hacer Atar; Toker, Ali; Ozoguz, Serdar (Společnost pro radioelektronické inženýrství, 2013-04)
    A new class of active filters, real active-only filters is described and possible implementation issues of these filters are discussed. To remedy these issues, a fully-differential active-only integrator block built around ...

  • A Box-Counting Method with Adaptable Box Height for Measuring the Fractal Feature of Images 

    Long, Min; Peng, Fei (Společnost pro radioelektronické inženýrství, 2013-04)
    Most of the existing box-counting methods for measuring fractal features are only applicable to square images or images with each dimension equal to the power of 2 and require that the box at the top of the box stack of ...

  • Classification of Jaw Bone Cysts and Necrosis via the Processing of Orthopantomograms 

    Mikulka, Jan; Gescheidtova, Eva; Kabrda, Miroslav; Perina, Vojtech (Společnost pro radioelektronické inženýrství, 2013-04)
    The authors analyze the design of a method for automatized evaluation of parameters in orthopantomographic images capturing pathological tissues developed in human jaw bones. The main problem affecting the applied medical ...

  • A Compact and Wideband Coupled-Line Coupler with High Coupling Level Using Shunt Periodic Stubs 

    Keshavarz, Rasool; Movahhedi, Masoud (Společnost pro radioelektronické inženýrství, 2013-04)
    A wideband microstrip forward-wave coupled-line coupler with high coupling value is presented. Compared with the conventional edge-coupled microstrip forward-wave coupler, this symmetrical structure, consisting periodic ...

  • Compact Circularly Polarized Patch Antenna Using a Composite Right/Left-Handed Transmission Line Unit-Cell 

    Geng, Lin; Wang, Guang-Ming; Zhang, Chen-Xin; Gao, Xiang-Jun; Zong, Bin-Feng (Společnost pro radioelektronické inženýrství, 2013-04)
    A compact circularly polarized (CP) patch antenna using a composite right/left-handed (CRLH) transmission line (TL) unit-cell is proposed. The CRLH TL unit-cell includes a complementary split ring resonator (CSRR) for shunt ...

  • Compact Elliptically Tapered Slot Antenna with Non-uniform Corrugations for Ultra-wideband Applications 

    Zhu, Fuguo; Gao, Steven (Společnost pro radioelektronické inženýrství, 2013-04)
    A small size elliptically tapered slot antenna (ETSA) fed by coplanar waveguide (CPW) for ultra-wideband (UWB) applications is proposed. It is printed on an FR4 substrate and occupies a size of 37×34×0.8 mm³. A pair of ...

  • Comparison of the Intrinsic Characteristics of LTCC and Silicon Pressure Sensors by Means of 1/f Noise Measurements 

    Zarnik, Marina Santo; Belavic, Darko; Sedlakova, Vlasta; Sikula, Josef; Kopecky, Martin; Sedlak, Petr; Majzner, Jiri (Společnost pro radioelektronické inženýrství, 2013-04)
    A pressure sensor with high resolution is of key importance for precise measurements in the low-pressure range. The intrinsic resolution of piezoresistive ceramic pressure sensors (CPSs) mainly depends on their func¬tional ...

  • Current and Voltage Mode Multiphase Sinusoidal Oscillators Using CBTAs 

    Sagbas, Mehmet; Ayten, Umut Engin; Herencsar, Norbert; Minaei, Shahram (Společnost pro radioelektronické inženýrství, 2013-04)
    Current-mode (CM) and voltage-mode (VM) multiphase sinusoidal oscillator (MSO) structures using current backward transconductance amplifier (CBTA) are proposed. The proposed oscillators can generate n current or voltage ...

  • Design and Modeling of Symmetric Three Branch Polymer Planar Optical Power Dividers 

    Prajzler, Vaclav; Tuma, Hynek; Spirkova, Jarmila; Jerabek, Vitezslav (Společnost pro radioelektronické inženýrství, 2013-04)
    Two types of polymer-based three-branch symmetric planar optical power dividers (splitters) were designed, multimode interference (MMI) splitter and triangular shape-spacing splitter. By means of modeling the real structures ...

  • Determination of Formant Features in Czech and Slovak for GMM Emotional Speech Classifier 

    Pribil, Jiri; Pribilova, Anna (Společnost pro radioelektronické inženýrství, 2013-04)
    The paper is aimed at determination of formant features (FF) which describe vocal tract characteristics. It comprises analysis of the first three formant positions together with their bandwidths and the formant tilts. ...

  • A Dual-Band Circularly-Polarized Patch Antenna with a Novel Asymmetric Slot for WiMAX Application 

    Noghabaei, S. M.; Rahim, S. K. A.; Soh, P. J.; Abedian, M.; Vandenbosch, G. A. E. (Společnost pro radioelektronické inženýrství, 2013-04)
    A compact design of a circularly-polarized (CP) microstrip antenna to achieve dual-band behavior for WiMAX applications is presented. A single-layered feed is used to excite a single square patch integrated with a novel ...

  • Electromagnetic Absorption of Gaussian Beams by a Grounded Layered Structure 

    Valagiannopoulos, Constantinos A. (Společnost pro radioelektronické inženýrství, 2013-04)
    A layered structure of magnetodielectric slabs, backed with a perfectly conducting plane, is illuminated by a Gaussian beam. The permittivities and permeabilities of each layer are selected so that the incident field ...

  • High Current Matching over Full-Swing and Low-Glitch Charge Pump Circuit for PLLs 

    Wang, De-zhi; Zhang, Ke-feng; Zou, Xue-cheng (Společnost pro radioelektronické inženýrství, 2013-04)
    A high current matching over full-swing and low-glitch charge pump (CP) circuit is proposed. The current of the CP is split into two identical branches having one-half the original current. The two branches are connected ...

  • High–Speed Data Transmission Subsystem of the SEOSAR/PAZ Satellite 

    Olivier Fernandez, Jean Raphael; Draskovic, Drasko; Briso-Rodriguez, Cesar (Společnost pro radioelektronické inženýrství, 2013-04)
    This paper analyzes a digital interface and bus system modeling and optimization of the SEOSAR/PAZ Earth Observation satellite. The important part of the satellite is an X–band Synthetic Aperture Radar instrument that ...