2002/2

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Now showing 1 - 5 of 8
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    Autocompensative System for Measurement of the Capacitances
    (Společnost pro radioelektronické inženýrství, 2002-06) Kollar, M.; Spany, V.; Gabas, T.
    A simple and successful design of an autocompensative system with flip-flop sensor for measurement of capacitances is presented. The analysis of the sensor is based on the state description with the vertical rise segments of the control pulse. The theoretical results are compared with measured data and good agreement is reported.
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    Two Synthesis Methods Based on Cepstral Parameterization
    (Společnost pro radioelektronické inženýrství, 2002-06) Pribil, J.; Madlova, A.
    The paper deals with two implementations of the speech synthesis based on the cepstral representation of the human vocal tract model. Both the approaches to speech modeling are evaluated in the frequency domain. The paper also compares computational complexity of these two methods.
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    Thermosensitive IC for Relative Temperature Determination
    (Společnost pro radioelektronické inženýrství, 2002-06) Gotra, O.; Kalita, W.; Slosarcik, S.; Pietrikova, A.; Saliga, J.
    The functioning algorithm and the scheme of the transducer unit applied in thermosensitive IC with relative temperature reading are proposed in this paper. The principal algorithm of functioning is in the formation of current with linear dependence on absolute temperature by additional transduction of current into differential signal with value determined by relative temperature scale.
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    Biquad Based on a Generalized Divider Structure
    (Společnost pro radioelektronické inženýrství, 2002-06) Ticha, D.; Martinek, P.
    The paper deals with the biquad based on a generalized divider structure. This principle can be considered as an effective way of universal filter and equalizers synthesis, which easily realizes any general transfer function. An attention is devoted to the derivation of optimum design conditions. As shown, these conditions strongly depend on the amplifier type used. The results obtained are illustrated by some design examples.
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    Chua's Circuit in Spread Spectrum Communication Systems
    (Společnost pro radioelektronické inženýrství, 2002-06) Galajda, P.; Kocur, D.
    Communication system via chaotic modulations is demonstrated. It contains the well-known chaotic circuits as its basic elements - Chua's circuits. The proposed system has some standard properties of spread spectrum communication. The following advantage is found in simulations: a) Transmitted signals have broad spectra. b) Secure communications are possible in the sense that the better parameter matching is required in order to recover the signal. c) The circuit structure of the communication system is most simple and communication systems are easily built at a small outlay. Finally computer simulations are given to examine the validity of this system.