Sökning: "sigma"

Visar resultat 16 - 20 av 151 avhandlingar innehållade ordet sigma.

  1. 16. Timing Uncertainty in Sigma-Delta Analog-to-Digital Converters

    Författare :Adam Strak; Hannu Tenhunen; Franco Maloberti; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; timing uncertainty; clock jitter; Sigma-Delta Analog-to-Digital Converter; sampling; clock generation; power-supply noise; substrate noise; Electronics; Elektronik;

    Sammanfattning : Denna avhandling presenterar en undersökning av orsakerna och effekterna av timingosäkerhet i Sigma-Delta Analog-Digital-Omvandlare, med speciellt fokus på Sigma-Delta av den switchade kapacitanstypen. Det undersökta området för orsakerna till timingosäkerhet är digital klockgenerering och området för effekterna är sampling. LÄS MER

  3. 17. Low-Power Delta-Sigma Modulators for Medical Applications

    Författare :Ali Fazli Yeknami; Atila Alvandpour; Martin Anderson; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : Biomedical electronics has gained significant attention in healthcare. A general biomedical device comprises energy source, analog-to-digital conversion (ADC), digital signal processing, and communication subsystem, each of which must be designed for minimum energy consumption to adhere to the stringent energy constraint. LÄS MER

  4. 18. Design of Multi-bit Sigma-Delta Modulators for Digital Wireless Communications

    Författare :Bingxin Li; KTH; []
    Nyckelord :sigma delta modulator wirelss ADC;

    Sammanfattning : The ever advance of CMOS digital circuit process leads tothe trend of digitizing an analog signal and performing digitalsignal processing as early as possible in a signal processingsystem, which in turn leads to an increasing requirement onanalog- to-digital converter (ADC). A wireless transceiver is asuch kind of signal processing system. LÄS MER

  5. 19. Design of Sigma Delta Modulators for Digital Wireless Communications

    Författare :Bingxin Li; KTH; []
    Nyckelord :sigma delta modulator oversampling Analog-to-digital wireless communication;

    Sammanfattning : .... LÄS MER

  7. 20. Evaluation of Sigma-Delta-over-Fiber for High-Speed Wireless Applications

    Författare :Ibrahim Can Sezgin; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; energy harvesting; wireless power transfer; 1-bit communication; distributed-MIMO; Sigma-delta-over-fiber SDoF ; vertical-cavity surface-emitting-laser VCSEL ; radio frequency RF ; wideband; ultra-high speed communication;

    Sammanfattning : Future mobile communication networks aim to increase the communication speed, provide better reliability and improve the coverage. It needs to achieve all of these enhancements, while the number of users are increasing drastically. LÄS MER