Sökning: "current limiting devices"

Visar resultat 1 - 5 av 29 avhandlingar innehållade orden current limiting devices.

  1. 1. Reduction of voltage dips by redesign of an industrial distribution system using fast switches and current limiting devices

    Författare :Anders Wikström; KTH; []
    Nyckelord :Power quality; voltage dips; current limiting devices;

    Sammanfattning : .... LÄS MER

  3. 2. Processing and characterization of silicon carbide (6H-SiC and 4H-SiC) contacts for high power and high temperature device applications

    Författare :Sang Kwon Lee; KTH; []
    Nyckelord :Silicon carbide; ohmic and schottky contacts; co-evaporation; current-voltage; powre devices; nano-particles; Schottky barrier height lowering; TLM structures;

    Sammanfattning : Silicon carbide is a promising wide bandgap semiconductormaterial for high-temperature, high-power, and high-frequencydevice applications. However, there are still a number offactors that are limiting the device performance. LÄS MER

  4. 3. Graphene field-effect transistors and devices for advanced high-frequency applications

    Författare :Marlene Bonmann; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; traps; graphene; self-heating; field-effect transistors; remote phonons; carrier transport; saturation velocity; microwave devices; impurities and defects;

    Sammanfattning : New device technologies and materials are continuously investigated, in order to increase the bandwidth of high-speed electronics, thereby extending data rate and range of applications. The 2D-material graphene, with its intrinsically extremely high charge carrier velocity, is considered as a promising new channel material for advanced high frequency field-effect transistors. LÄS MER

  5. 4. Nonlinear Characterisation and Modelling of Microwave Semiconductor Devices

    Författare :Mattias Thorsell; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; noise modelling; nonlinear measurement; active load-pull; noise measurement; thermal characterisation; AlGaN GaN HEMT; nonlinear modelling;

    Sammanfattning : There is an increasing need for more accurate models taking into account the nonlinearities and memory effects of microwave transistors. The memory effects are especially important for transistor technologies suffering from relatively large low frequency dispersion, such as GaN baed HEMTs. LÄS MER

  7. 5. Organic Photodiodes : Optical, electric, and morphological aspects of polymer based devices

    Författare :Lucimara Stolz Roman; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The use of semiconducting organic materials as the active layer in optoelectronic devices offers some advantages in processing and new possibilities of device fabrication such as large-area devices. The mechanism of charge generation upon light absorption in organic materials differs from that in inorganic semiconductors. LÄS MER