Sökning: "bipolar distribution"

Visar resultat 6 - 10 av 25 avhandlingar innehållade orden bipolar distribution.

  1. 6. Simulation and Characterization of Silicon Carbide Power Bipolar Junction Transistors

    Författare :Benedetto Buono; Mikael Östling; Gunnar Malm; Martin Domeij; Lothar Frey; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; silicon carbide; power device; BJT; diode; simulation; characterization; current gain; on-resistance; breakdown voltage; forward voltage drop; degradation; SRA - ICT; SRA - Informations- och kommunikationsteknik;

    Sammanfattning : The superior characteristics of silicon carbide, compared with silicon, have suggested considering this material for the next generation of power semiconductor devices. Among the different power switches, the bipolar junction transistor (BJT) can provide a very low forward voltage drop, a high current capability and a fast switching speed. LÄS MER

  3. 7. Metall organic vapour phase epitaxy for advanced III-V devices

    Författare :Nils Nordell; Sture Petersson; Gunnar Landgren; Ferdinand Scholz; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Metalorganic vapour phase epitaxy MOVPE ; III-V compound semiconductors; epitaxial uniformity; p-type doping profiles; epitaxial regrowth; chlorine-MOVPE; buried heterostructure laser; heterostructure bipolar transistor; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : Metalorganic vapour phase epitaxy (MOVPE) has proven to be a successful method for growth of structures for advanced optoelectronic semiconductor devices in III-V compounds. This thesis deals with technological and process related aspects of MOVPE from an experimental perspective. LÄS MER

  4. 8. Distribution and regulation of neuropeptide Y and its receptors in the human and rat brain : role in affective disorders

    Författare :Laura Caberlotto; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :neuropeptide Y; neuropeptide Y receptors; human; depression; Flinder Sensitive Line rats; in situ hybridization; receptor autoradiography; immunohistochemistry;

    Sammanfattning : Neuropeptide Y (NPY) is one of the most abundant peptides found within the mammalian brain. Many studies have documented that this 36-amino acid peptide exerts a wide range of central effects. LÄS MER

  5. 9. Theoretical Investigation of Resonant-Tunneling Structures

    Författare :Anders Kindlihagen; K-F Brennan; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Resonant-tunneling structures are generally of great interest, both for technological applications and for basic theoretical research. This work focuses on the Double-Barrier Resonant-Tunneling Structure (DBRTS). We investigate both unipolar and bipolar DBRTSs. LÄS MER

  7. 10. Cytoskeletal Regulation During Embryonic Development in Drosophila melanogaster

    Författare :Mojgan Padash; Udo Häckers grupp Utvecklingsbiologi i invertebrater; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Naturvetenskap; Natural science; DRhoGEF2; Actin cytoskeleton; Rho GTPase;

    Sammanfattning : The development of multicellular organisms is associated with extensive rearrangements of cells and tissues. The driving force for these rearrangements is generated by the cell's actin cytoskeleton. During many morphogenetic processes dynamic rearrangement of the actin cytoskeleton is regulated by small GTPases of the Rho-family. LÄS MER