Sökning: "Delta"

Visar resultat 1 - 5 av 590 avhandlingar innehållade ordet Delta.

  1. 1. Continuous-Time Delta-Sigma Modulators for Wireless Communication

    Författare :Mattias Andersson; Institutionen för elektro- och informationsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; return-to-zero; A D converter; loop delay; delta-sigma; ADC; CMOS; STF; continuous-time; sigma; delta; filtering; CT; RZ;

    Sammanfattning : The ever increasing data rates in wireless communication require analog to digital converters (ADCs) with greater requirements on speed and accuracy, while being power efficient to prolong battery life. This dissertation contains an introduction to the field and five papers that focus on the continuous-time (CT) Delta-Sigma modulator (DSM) as ADC. LÄS MER

  3. 2. Wideband Sigma-Delta Modulators

    Författare :Xiaolong Yuan; Svante Signell; Jakob Wikner; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; sigma-delta modulator; feedforward; reconfigurable; quadrature bandpass filtering; Electronics; Elektronik;

    Sammanfattning : Sigma-delta modulators (SDM) have come up as an attractive candidatefor analog-to-digital conversion in single chip front ends thanks to the continuousimproving performance. The major disadvantage is the limited bandwidthdue to the need of oversampling. LÄS MER

  4. 3. Experimental Studies of Delta Excitations in Nuclei Using the (d,2He) and (3He,t) Reactions

    Författare :Michael Österlund; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nuclear physics; d; 2He and 3He; t reactions; delta exitation; tensor polarisation; spin response; delta decay; coherent pion production; Kärnfysik; Nuclear physics; Kärnfysik; Applied Nuclear Physics; tillämpad kärnfysik;

    Sammanfattning : .... LÄS MER

  5. 4. Silicon Carbide Sigma-Delta Modulatorfor High Temperature Applications

    Författare :Ye Tian; Carl-Mikael Zetterling; Ana Rusu; Jerzy Dabrowski; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; silicon carbide SiC ; bipolar; sigma-delta; data conversion; OpAmp; integrated circuit IC ; Informations- och kommunikationsteknik; Information and Communication Technology;

    Sammanfattning : .... LÄS MER

  7. 5. Development of the Laitaure Delta, Swedish Lappland : A Study of Growth, Distributary Forms and Processes

    Författare :Hans Andrén; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Recent delta formation; hydraulic geometry; distributary forms and processes; X-ray radiography; Sarek; Lappland; Earth Science with specialization in Physical Geography; Geovetenskap med inriktning mot naturgeografi;

    Sammanfattning : Deltaic processes were studied on the Laitaure delta. Specific aims were to: analyse forms and processes in distributaries with regard to hydraulic geometry relationships; investigate the distribution of water into different distributaries; analyse the morphological development of the delta; and quantify the advance of the delta front. LÄS MER