Now showing items 21-40 of 3563

  • RF Power Amplifier Analysis 

    Pelikan, K.; Lokay, M. (Společnost pro radioelektronické inženýrství, 1993-04)
    The special program is presented for the demonstration of RF power transistor amplifiers for the purposes of the high-school education in courses of radio transmitters. The program is written in Turbo Pascal 6. 0 and enables ...
  • Computer Simulation of Light Propagation in Photonic Waveguide Structures 

    Plesingr, J.; Ctyroky, J. (Společnost pro radioelektronické inženýrství, 1993-04)
    An interactive program for simulating light propagation through photonic waveguide structures was developed. From the viewpoint of CAD, two parts of this program are interesting: the channel waveguide editor, and the 3D ...
  • Programme Code for Projecting of WDM Fiber Optic Sensor Systems 

    Turan, J.; Probstner, R. (Společnost pro radioelektronické inženýrství, 1993-04)
    Wavelength division multiplex (WDM) offers a potentially powerful technique for use within optical fibre sensor systems. The paper deals with short description of methodology and a programme code for WDM fiber optic sensor ...
  • The Antenna Array 

    Raida, Zbyněk (Společnost pro radioelektronické inženýrství, 1993-04)
    The presented program is devoted to the analysis of general ekvidistant antenna arrays. "The Antenna Array" computes gain, radiation resistance and directivity patterns of antenna systems.
  • A Simple Method of Measuring the Noise Figure of the NMR Spectometer 

    Kasal, M.; Husek, V.; Halamek, J. (Společnost pro radioelektronické inženýrství, 1993-07)
    Sensitivity is one of the fundamental parameters of the Nuclear Magnetic Resonance experiment. It depends particularly on the coil and impedance matching of the resonance circuit of the probe to the input amplifier. However, ...
  • Switched Capacitor Equivalent of Frequency Dependent Negative Resistor 

    Mikula, J.; Dostal, T. (Společnost pro radioelektronické inženýrství, 1993-07)
    A new circuit of frequency dependent negative resistor (FDNR), derived using an almost linear s-z transformation in a four phase switched capacitor (SC) network is presented.
  • Multiple-Dwell Serial-Search Code Acquisition of Spread-Spectrum Receiver - Mean Acquisition Time at Fixed False-Alarm Penalty 

    Simsa, J.; Triska, I. (Společnost pro radioelektronické inženýrství, 1993-07)
    The contribution summarizes the results of the mean code acquisition time calculations of multiple - dwell serial search detector with fixed false-alarm penalty. The repeated calculations enable to choose optimum values ...
  • A Novel Approach to the Speech and Channel Coding System 

    Cizmar, A. (Společnost pro radioelektronické inženýrství, 1993-07)
    In this paper a novel approach to the speech-and-channel coding system is proposed. The main idea of this approach is splitting an input speech signal into its integer and fractional parts and their different coding to ...
  • Full Custom Design of a 8-bit Subranging Flash A/D Convertor 

    Vanneuville, J.; Gevaert, D.; Sevenhans, J. (Společnost pro radioelektronické inženýrství, 1993-07)
    This paper describes the design of a Nonius Flash Analog to Digital Convertor for video-applications. The conversion is split up in two stages: the MSB and the LSB conversion stage. In the LSB conversion stage, the ...
  • Technical Aspects of Electrical Neurostimulation 

    Magdolen, J. (Společnost pro radioelektronické inženýrství, 1993-11)
    This paper deals with technical aspects of electrical neurostimulation. Attention is given to problems of transmission of signals and power through inductive link created by coupled resonant circuits. Both geometric and ...
  • System for Digital 1D-Image Processing with 1024 Pixel CCD Sensor 

    Kulla, P.; Sevcik, P.; Chrenek, M.; Misun, J. (Společnost pro radioelektronické inženýrství, 1993-11)
    The conception of system for digital 1D-images processing with digital CCD camera is presented. The system is created from these three basic parts: the digital CCD camera with linear image sensor CCD L133C, 8-bit interface ...
  • A New Modification of Photometric Method 

    Sevcik, P.; Kulla, P.; Misun, J.; Chrenek, M. (Společnost pro radioelektronické inženýrství, 1993-11)
    For the digital 1D-image processing we go out from the so-called photometric method. For the concrete applications of the introduced method its accuracy lowers, owing to that the form of an output video signal of linear ...
  • Theoretical Comparison of PR3+-Doped La-Ga-S and Fluoride Glass Fibre Amplifier 

    Karasek, M.; Tobben, H. (Společnost pro radioelektronické inženýrství, 1993-11)
    The performance and efficiency of a praseodymium-doped La-Ga-S chalcogenide glass fibre amplifier have been analyzed using a comprehensive large-signal numerical model. The four level laser model incorporates the LP01 mode ...
  • A Conical Dielectric-Loaded Horn with Symmetrical Radiation Pattern 

    Hajach, P. (Společnost pro radioelektronické inženýrství, 1993-11)
    A relatively broadband dual-mode conical horn, which has a symmetrical radiation pattern and extremely low sidelobes, can be obtained by loading a dielectric layer inside the feedhorn. An investigation of the radiation ...
  • Some Problems in Elaboration of Equivalent Electrical Schematics of Linear Mechanical Systems 

    Ducko, A. (Společnost pro radioelektronické inženýrství, 1993-11)
    The solution of different acoustical signal processing problems in electroacustic transducers are usually based on the method of electromechanical analogies. Finding of equivalent electrical schematics of mechanical systems ...
  • Generation of Digital Modulation for Optical Communication Using Tunable Active-R Oscillator 

    Pal, D.; Sanyal, S. K.; Nandi, R. (Společnost pro radioelektronické inženýrství, 1993-12)
    This paper describes the design of an active-R biphase oscillator using a pair of matched Operational Amplifier (OA) and a few resistors. The frequency of oscillation of such oscillator is tunable by a resistor (R0). The ...
  • Design of Amplifiers with Potentially Unstable Transistors 

    Novak, S. (Společnost pro radioelektronické inženýrství, 1993-12)
    Paper presents overview of methods used for stabilization of high frequency and microwave transistors amplifiers using potentially unstable transistors. The S-parameter approach is used for analysis of the amplifier stability ...
  • The Discrete System and Its Models for Digital Signal Processors 

    Smekal, Z. (Společnost pro radioelektronické inženýrství, 1993-12)
    The discrete system is mostly described with the help of the system transfer function and the zero input response is usually neglected. In this paper the state-space equations express the total response of the discrete ...
  • Analysis of Irregular Networks Using Diakoptic Modification of Admittance Matrix Inversion 

    Rybin, A. I.; Trochimenko, J. K.; Radionova, M. V. (Společnost pro radioelektronické inženýrství, 1993-12)
    A special method of admittance matrix inversion is presented in this article. This method is based on diakoptic tearing of non-standard networks and then solving the subnetworks step by step with added torn branches. It ...
  • LTP - A Tutorial Program for Analysis of Linear Two - Ports 

    Valsa, J. (Společnost pro radioelektronické inženýrství, 1993-12)
    The paper describes basic possibilities offered by the program LTP (Linear Two-Ports) in teaching electrial networks theory. At the same time the most important algorithms used in the program are briefly described. The ...