Sökning: "Switching"

Visar resultat 21 - 25 av 1043 uppsatser innehållade ordet Switching.

  1. 21. Leverantörsbytens verkliga kostnad: Mer än bara enhetskostnaden

    Kandidat-uppsats, Högskolan i Gävle/Industriell ekonomi

    Författare :Pontus Wikström; [2023]
    Nyckelord :Inköp; leverantörsutvärdering; leverantörsbyte; enhetspris; totalkostnad; hemtagningskostnad; reshoring;

    Sammanfattning : The purchasing department's impact on the companies and its results has grown as more goods and services are purchased from other companies. One of the department's most important tasks is to keep costs down, and therefore are alternative suppliers constantly sought, often in other countries with lower wages. LÄS MER

  3. 22. Radiation Effects on GaN-based HEMTs for RF and Power Electronic Applications

    Master-uppsats, KTH/Tillämpad fysik

    Författare :Wilhelm Holmberg; [2023]
    Nyckelord :High Electron Mobility Transistor; HEMT; Gallium Nitride; GaN; Silicon Carbide; SiC; Proton Radiation; Galliumnitrid; GaN; Kiselkarbid; SiC; Kisel; Si; HEMT; Transistor; Protonstrålning;

    Sammanfattning : GaN-HEMTs (Gallium Nitride-based High Electron Mobility Transistors) have, thanks to the large band gap of GaN, electrical properties that are suitable for applications of high electrical voltages, high currents, and fast switching. The large band gap also gives GaN-HEMTs a high resistance to radiation. LÄS MER

  4. 23. Phase Noise Performance of a PLL Frequency Synthesizer when Powered by Silent Switchers

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Sampriti Basu; [2023]
    Nyckelord :Silent Switcher; PLL synthesizer; Phase noise; PCB implementation.; Silent Switcher; PLL-synthesizer; fasbrus; PCB-implementering.;

    Sammanfattning : In use today are ‘normal’ DC-DC switching regulators with considerable switching noise and ringing, which is bad for noise-sensitive applications. This project involves a solution based on ‘Silent Switchers’ to prove its effectiveness in reducing noise. LÄS MER

  5. 24. Turning off the lights or changing the lamps? : Evaluation of the electricity use at Uppsala University Hospital

    Kandidat-uppsats, Uppsala universitet/Institutionen för samhällsbyggnad och industriell teknik

    Författare :Maya Linder; Julia Malmås; Sofia Näslund; Matilda Sojé; [2023]
    Nyckelord :;

    Sammanfattning : This bachelor thesis will examine the actions that have been taken to lower the electricity use at Uppsala University Hospital during the winter of 2022/2023. To be able to evaluate the changes that have been done there will be a comparison between the winter of 2022/2023 and the winter of 2021/2022. LÄS MER

  7. 25. Byte från IEC 103 till IEC 61850 : Förstudie

    Uppsats för yrkesexamina på grundnivå, Uppsala universitet/Signaler och system

    Författare :Daniel Nilsson; Adam Eriksson; [2023]
    Nyckelord :IEC 103; IEC 61850; Ställverkskommunikation; Ställverk; SSAB;

    Sammanfattning : The steel company SSAB in Borlänge will, in the near future, replace its protective relays in one of their substations due to the condition and age of the relays. In connection with the change, SSAB intended to switch the current communication protocol IEC 60870-5-103 (IEC 103) to IEC 61850. LÄS MER