Browsing by Author "Thiede, Andreas"

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    16 x 16 bit parallel multiplier based on 6 K gate array with 0.3 μm AlGaAs/GaAs quantum well transistors
    (1992) Thiede, Andreas; Berroth, Manfred; Hurm, Volker; Nowotny, Ulrich; Seibel, Jörg; Gotzeina, W.; Sedler, Martin; Raynor, Brian; Köhler, Klaus; Hofmann, Peter; Hülsmann, Axel; Kaufel, Gudrun; Schneider, Joachim
    The design and performance of a 16x16 bit parallel multiplier based on a 6 K gate array will be presented. This LSI semicustom IC demonstrates the high potential of the authors' AlGaAs/GaAs quantum well FETs with a gate length of 0.3 μm. The best multiplication time measured was 7.2 ns.
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    An 18-34-GHz dynamic frequency divider based on 0.2-μm AlGaAs/GaAs/AlGaAs quantum-well transistors
    (1993) Thiede, Andreas; Berroth, Manfred; Nowotny, Ulrich; Seibel, Jörg; Bosch, Roland; Köhler, Klaus; Raynor, Brian; Schneider, Joachim
    The design and performance of a dynamic frequency divider was presented. This digital IC demonstrates the ability of the authors' AlGaAs/GaAs/AlGaAs quantum-well FETs with gate lengths of 0.2 μm. Stable operation was achieved in the frequency range from 18 GHz up to 34 GHz with a power consumption of 250 mW. To the authors' knowledge, this is the best result ever reported for HEMT circuits, and is similar to the frequency limit achieved by use of AlGaAs/GaAs HBTs.
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    28-51 GHz dynamic frequency divider based on 0.15 μm T-gate Al0.2Ga0.8As/In0.25Ga0.75As MODFETs
    (1993) Thiede, Andreas; Tasker, Paul; Hülsmann, Axel; Köhler, Klaus; Bronner, Wolfgang; Schlechtweg, Michael; Berroth, Manfred; Braunstein, Jürgen; Nowotny, Ulrich
    The design and performance of a 28-51 GHz dynamic frequency divider based on pseudomorphic Al0.2Ga0.8As/In0.25Ga0.75As MODFETs with 0.15 μm mushroom-shaped gates are presented. The circuit has a power consumption of approximately 440 mW and a chip area of approximately 200x220 μm2.
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    Digital dynamic frequency dividers for broad band application up to 60 GHz
    (1993) Thiede, Andreas; Berroth, Manfred; Tasker, Paul; Schlechtweg, Michael; Seibel, Jörg; Raynor, Brian; Hülsmann, Axel; Köhler, Klaus; Bronner, Wolfgang
    A broadband dynamic frequency divider based on pseudomorphic Al0.2Ga0.8As/In0.25Ga0.75As MODFETs and passive loads is presented. Stable operation from 28 GHz up to 51 GHz with a power consumption of 440 mW could be shown. SPICE network simulation predicts operation in the 35 GHz - 60 GHz range for a divider circuit using an advanced E/D AlGaAs/InGaAs MODFET process.