Now showing items 1-20 of 55

  • 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 ...
  • All-Pass Sections with High Gain Opportunity 

    Ibrahim, M. A.; Minaei, S.; Yuce, E. (Společnost pro radioelektronické inženýrství, 2011-04)
    In this paper, two new circuits for realizing firstorder voltage-mode (VM) all-pass section (APS) with variable gain are presented. The first proposed filter uses a single differential difference current conveyor (DDCC), ...
  • Analysis and Design Procedure of LVLP Sub-bandgap Reference - Development and Results 

    Urban, T.; Subrt, O.; Martinek, P. (Společnost pro radioelektronické inženýrství, 2011-04)
    This work presents an thorough analysis and design of a low-voltage low-power voltage reference circuit with sub-bandgap output voltage. The outcome of the analysis and the resulting design rules are universal and it is ...
  • Analysis of Broadcast Authentication Mechanism in Selected Network Topologies 

    Vanek, T.; Rohlik, M. (Společnost pro radioelektronické inženýrství, 2011-04)
    This paper deals with simulation of the broadcast authentication protocols using Colored Petri Nets and further optimizations in Matlab environment. Typical application of broadcast authentication protocols can be ...
  • Analysis of Resolution in Aerial Earth Surface Photography 

    Ricny, V.; Slanina, M. (Společnost pro radioelektronické inženýrství, 2011-04)
    The paper deals with a simplified analysis of subjective resolution of an aerial sensing system for Earth surface photography in the visible light spectrum. The proposed simplified linear method allows approximate estimation ...
  • Analysis of Simulation Methods for Far-end Crosstalk Cancellation 

    Lafata, P.; Jares, P. (Společnost pro radioelektronické inženýrství, 2011-04)
    The information capacity of current digital subscriber lines is limited mainly by a crosstalk in metallic cables. The influence of near-end crosstalk (NEXT) can be well cancelled by frequency duplex method, but the elimination ...
  • 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 ...
  • ASR Systems in Noisy Environment: Analysis and Solutions for Increasing Noise Robustness 

    Rajnoha, J.; Pollak, P. (Společnost pro radioelektronické inženýrství, 2011-04)
    This paper deals with the analysis of Automatic Speech Recognition (ASR) suitable for usage within noisy environment and suggests optimum configuration under various noisy conditions. The behavior of standard parameterization ...
  • Basic Block of Pipelined ADC Design Requirements 

    Kledrowetz, V.; Haze, J. (Společnost pro radioelektronické inženýrství, 2011-04)
    The paper describes design requirements of a basic stage (called MDAC - Multiplying Digital-to- Analog Converter) of a pipelined ADC. There exist error sources such as finite DC gain of opamp, capacitor mismatch, thermal ...
  • 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 ...
  • A Chaotic IP Watermarking in Physical Layout Level Based on FPGA 

    W. Liang, X. Sun, Z. Xia, D. Sun, J. Long (Společnost pro radioelektronické inženýrství, 2011-04)
    A new chaotic map based IP (Intellectual Property) watermarking scheme at physical design level is presented. An encrypted watermark is embedded into the physical layout of a circuit by configuring LUT (Lookup Table) as ...
  • Coaxial Filters Optimization Using Tuning Space Mapping in CST Studio 

    Wolansky, D.; Tkadlec, R. (Společnost pro radioelektronické inženýrství, 2011-04)
    This paper deals with the optimization of coaxial filters using Tuning Space Mapping (TSM) method implemented to CST environment. The function of fine and coarse model and their link between each other is explained. In ...
  • The Combined Effect of Signal Strength and Background Traffic Load on Speech Quality in IEEE 802.11 WLAN 

    Pocta, P. (Společnost pro radioelektronické inženýrství, 2011-04)
    This paper deals with measurements of the combined effect of signal strength and background traffic load on speech quality in IEEE 802.11 WLAN. The ITU-T G.729AB encoding scheme is deployed in this study and the Distributed ...
  • 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 ...
  • 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 ...
  • Current Gain Controlled CCTA and its Application in Quadrature Oscillator and Direct Frequency Modulator 

    Sotner, R.; Jerabek, J.; Prokop, R.; Vrba, K. (Společnost pro radioelektronické inženýrství, 2011-04)
    A modified conception of adjustable current conveyor transconductance amplifier (CCTA) and its interesting application in simple quadrature oscillator expandable for direct frequency modulation purposes, employing only ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Development in Electronic Packaging – Moving to 3D System Configuration 

    Szendiuch, I. (Společnost pro radioelektronické inženýrství, 2011-04)
    The electronic industry is reducing package dimensions of components as well as complete electronics systems. Surface mount device passives and semiconductor chips have to be mounted together bringing a functional system ...