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	Sensitivity of CdS photoresistors in ultraviolet spectrum and technology Franc, J. ; Novotný, Jan ; Jirásek, L. ; Petráň, S. ; Kliment, P. Several groups of photoresistors based on thin film of evaporated CdS were prepared. Groups were distinguished in concentrations of acceptors (Cu) and donors (Cl) which were used in activation of layers. Each group was characterised by means of slope in visible range and by relative sensitivity in UVA region. Relative sensitivity in UVA region decreases when concentrations of activators increasee. Úplný záznam
	Differences in speech processing of male, female and child voices Přibil, Jiří This paper is focused on the description of differences in speech signal processing of male, female and child voices. Some problems with spectra smoothing of high female and child voices are discussed. Attention is also paid to right setting of input parameters in speech spectrogram calculation. Úplný záznam
	Application of some number theory fundamentals in signal processing Čížek, Václav ; Švandová, Hana The paper presents basic concepts of the number theory and some properties of operations with integers that find applications in the digital signal processing. Hereien come the Euclid's algorithm and its use for evaluating continued fractions, solution of congruence equations and of diophantine equantions, multiplicative inverse and the Chinese remainder theorem. Úplný záznam
	The symbolic method of network analysis based on topological methods Braun, Jaromír ; Žilka, Zdeněk ; Berka, Zbyněk In the paper the regular skeleton of graph is defined and the generalized formula for evaluation of network determinants is presented. This reqiure explicit listing of the all regular multiskeletons of connected multigraph. The computer programs NTW001 and NTWTOOBV based on this methods will be presented. Úplný záznam
	Technolgy of materials preparation for the high sensitivity infrared detectors Novotný, Jan ; Zelinka, Jiří ; Franc, J. Single crystals of triglycine sulphate (TGS) doped with L-alanin, lysin and with Co.sup.2+.sup., Cd.sup.2+.sup. and PO.sub.4./sub..sup.3-.sup. were grown from aqueous solutions by means of slow cooling method. Concentration of doping elements varied from 5 to 20mol. per cent. Morphology, domain structure and P-E hysteresis loops have been investigated. TGS single crystals doped with Co.sup.2+.sup. and PO.sub.4./sub..sup.3-.sup. show the inernal fields as high as 217 kV/m with peculiarities in the hysteresis loops. The best hysteresis loop has been obtained on TGS crystal doped with Lysin and Cd.sup.2+.sup. ions. Úplný záznam
	Interconnections discontinuities in electronic systems and signal integrity faults Žilka, Zdeněk ; Berka, Zbyněk ; Braun, Jaromír The paper deals with the influence of discontinuities in interconnecting traces, vias, pads, connectors, parasitics of the IC packages and all other passive interconnecting elements in multi-layer printed-circuit boards (PCB) and multichip modules (MCM) on the signal integrity (SI) of complex mixed-signal electronic system. Simple models, rules and guidelines suitable for human handling are introduced. Úplný záznam
	Application of programmable logical fields by the construction of microcomputer Kostka, František The contribution deals with the microcomputer signals modification by programmable logical field. In one regime, the microcomputer operates in the standard mode, reading instructions from the program's external memory; the second regime is programming, whereby it selfprogrammes its own program memory from a file stored in the PCMCIA memory card. Úplný záznam
	Estimation of the parameters of quartz oscillators Čermák, Jan The main parameters of quartz oscillators are frequency accuracy, frequency drift, and frequency (phase) stability. Methods used to estimate these parameters depend on the oscillator quality and measurements capability of the calibration laboratory. The issue is demonstrated on the measurements performed within the National Time and Frequency Standard. Úplný záznam
	Frequency synthesizers with sigma-delta modulation Kroupa, Věnceslav František ; Štursa, Jarmil We shall discus basic parameters of the steering signal. This signal is built in the sigma-delta modulator and controls pulse removing in the PLL frequency synthesizer. We shall investigate the dependence of these parameters on sigma-delta modulator order and give spurious phase spectrum of the fractional-N synthesizer with a low-pass filter of high degree. Úplný záznam

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