Now showing items 1-20 of 113

    • Nemlineáris áramkörszimuláció személyi számítógépen 

      Székely, Vladimir; Fábry G; Fiser J; Laczik Zs; Poppe, András (1987)
      A cikk egy népszerű személyi számítógéptípusra készített nemlineáris áramkörszimulációs programot mutat be. Bőséges ábraanyagával azt igyekszik érzékeltetni, hogy miképp aknázhatók ki a személyi számítógépek nyújtotta ...
    • Minimum Sensitivity Calibration for Reflectometers 

      Ladvánszky, János; Hilt, Attila (1992-10-07)
      Sensitivities of the error-corrected reflection coefficient (rc) with respect to the rc's of the calibrating elements are minimized. A minimum can be found if the rc's of the calibrating elements form a regular triangle ...
    • High-Frequency Electro-Optical Model for MESFETs 

      Baranyi, András; Berceli, Tibor; Hilt, Attila; Ladvánszky, János (1993)
    • Modelling Electro-Optical Interaction in MESFETs 

      Berceli, Tibor; Baranyi, András; Hilt, Attila; Ladvánszky, János (1993-07-01)
      A modelling procedure is presented for MESFETs with both electrical and optical inputs. First a physical model is introduced for the illuminated MESFET. The actual circuit model with electrical and optical variables is ...
    • Mikrohullámú digitális rádióberendezések mérése a 23 és a 26 GHz-es frekvenciasávban 

      Hilt, Attila; Györösi, Julianna; Farkasvölgyi, János; Csonka, István (1993-08-01)
      Magyarországon a 23 és a 26 GHz-es mikrohullámú digitális rddióberendezések jelentősége növekszik, az alacsonyabb frekvenciasávok (15 GHz, 18 GHz) telítettsége miatt. Relatív olcsó áron és gyorsan bővíthető velük a szűkös ...
    • Harmonic-Balance Analysis of Optically Injection Locked Microwave FET Oscillators 

      Berceli, Tibor; Rizzoli, Vittorio; Neri, Andrea; Baranyi, András; Hilt, Attila; Ladvánszky, János (1993-09-06)
      The paper discusses the application of harmonic-balance (HB) techniques to the analysis of optical injection locking of microwave FET oscillators. HB methods are first extended to cover the case of a circuit excited by a ...
    • Dynamic Properties of Optically Controlled FET Amplifiers 

      Berceli, Tibor; Cabon, Beatrice; Hilt, Attila; Ho Quoc, Anh; Pic, Étienne; Tedjini, Smail (1994-11-23)
      The transmission of FET amplifiers can be controlled by a laser light illuminating the device. Due to the illumination the gain of the amplifíer is increased significantly. In this paper the dynamic properties of the gain ...
    • On Minimum Sensitivity Reflectometers 

      Ladvánszky, János; Hilt, Attila; Zoller, Vilmos; Csonka, István (1995)
      The equation f(x, x1, x2, x3)=f(y, y1, y2, y3) is considered that characterizes the relation between the measured reflection coefficient x, the calibrating reflection coefficients x1, x2, x3 and the corresponding values ...
    • Transmission and Distortion of an Optical-Microwave Modulation Transducer 

      Baranyi, András; Hilt, Attila (1995-08-31)
      The optical-microwave modulation transducer is a circuit transforming the intensity modulation of a lightwave to the modulation of a microwave carrier. In this paper using the linear parametric model of the transducer ...
    • Performance of Future Event Set Implementations 

      Lencse, Gábor (1996)
      Seven data structures were examined with simulation and compared to find out which one should be used to implement the Future Event Set of an event driven discrete event simulator. The number of key comparisons and pointer ...
    • Dynamic Characterization of Optically Controlled Semiconductor Devices 

      Berceli, Tibor; Cabon, Béatrice; Hilt, Attila; Járó, Gábor; Ladvánszky, János (1996-03-25)
      Optical control of semiconductor devices is a new area, which can be used in several applications. The dynamic behavior of these devices is a crucial problem. Reliable method for its characterization is highly needed. The ...
    • Hybrid Integration of Laser Diode Chips on a Glass Substrate 

      Cabon, Béatrice; Hilt, Attila; Vilcot, Anne; Czotscher, Konrad; Weisser, Stefan; Berceli, Tibor (1996-06-05)
      An important task in optoelectronics is to realize optoelectronic transceivers in which a laser diode chip is hybrid integrated with an an optical integrated circuit (OIC). In the paper, hybrid integration of Multi-Quantum ...
    • Microwave Distributed Amplifier in Hybrid Integrated Technology 

      Zólomy, Attila; Hilt, Attila; Baranyi, András; Járó, Gábor (1997)
      In the paper the gain-bandwidth relations of microwave distributed amplifiers are analyzed. It is shown that in case of proper realization corresponding to distributed amplifier (DA) requirements the amplifier gain and ...
    • Gain and Noise Optimization of an Optical Receiver Utilizing a Distributed Amplifier 

      Járó, Gábor; Berceli, Tibor; Hilt, Attila; Zólomy, Attila (1997)
      In wideband optical communications the bandwidth and the noise of optical receivers are crucial problems. The application of a distributed amplifier instead of a transimpedance amplifier in an optical receiver has the ...
    • A Millimeter Wave PLL Oscillator for Optical Receivers 

      Udvary, Eszter; Zólomy, Attila Imre; Hilt, Attila; Járó, Gábor; Mihály Sándor; Berceli, Tibor (1997)
      The design and experimental investigations of a harmonic microwave oscillator is presented. The transistor oscillator was designed to operate at the fundamental frequency with high third harmonic output. The final goal is ...
    • Frequency Conversion Methods by Interferometer and Photodiode in Microwave Optical Links 

      Hilt, Attila; Maury, Ghislaine; Cabon, Beatrice; Vilcot, Anne; Berceli, Tibor (1997-08)
      Recently fiber optic links have been investigated by several authors for the transmission and distribution of microwave and millimeter-wave signals [1], [2]. For further signal processing, frequency conversion is necessary ...
    • Noise Properties of Optical Receiversusing Distributed Amplification 

      Járó, Gábor; Hilt, Attila; Zólomy, Attila; Berceli, Tibor (1997-08)
      ln wideband optical communications the bandwidth and the noise of optical receivers are crucial problems. The application of a distributed amplifier instead of a transimpedance amplifier in an optical receiver has the ...
    • Microwave Characterization of High-Speed pin Photodiodes 

      Hilt, Attila; Járó, Gábor; Zólomy, Attila; Cabon, Beatrice; Berceli, Tibor; Marozsák, Tamás (1997-10-16)
      Optical responsivity and electrical reflection of an ultra high-speed pin photodiode (PD) are measured in 20 GHz frequency range. The effect of PD bias voltage variation was investigated at different incident optical power ...
    • New Topology for Distributed Amplifiers in Hybrid Integrated Technology 

      Zólomy, Attila; Hilt, Attila; Marozsák, Tamás; Járó, Gábor (1997-10-17)
      In this paper alternative circuit topologies for hybrid integrated distributed amplifiers (DA) are analyzed and compared. Improvement in the gain-bandwidth product and decrease in the gain ripple using the proposed new ...
    • Investigation of Direct Modulated Laser Diodes 

      Marozsák, Tamás; Hilt, Attila; Mihály, Sándor; Zólomy, Attila; Járó, Gábor (1997-10-17)
      Characterisation of direct modulated laser diodes has an important role in the design of microwave fiber optic links. Modulation bandwidth and electrical reflection was measured in GHz frequency range and applied for bias ...