Sökning: "RZ"

Visar resultat 1 - 5 av 10 avhandlingar innehållade ordet RZ.

  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. Biogeochemical processes in forest riparian zones : conceptualizing function and heterogeneity in boreal catchments

    Författare :Jose Ledesma; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The area of interaction between terrestrial and aquatic environments, i.e. the riparian zone (RZ), has long been recognized as an important landscape feature from both scientific and management perspectives. Surface water quality is to a great extent regulated by substances exported from RZs. LÄS MER

  4. 3. CMOS Analog-to-Digital Converters - Analysis, Modeling, and Design

    Författare :Martin Andersson; Institutionen för elektro- och informationsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : A high-performance and flexible analog-to-digital converter (ADC), that can be integrated in deep-submicron CMOS technology, is a key building block for reduced size, cost and power consumption of digital communication systems. This dissertation concerns the investigation of particular problems associated with the design of such ADCs. LÄS MER

  5. 4. Zeros and growth of entire functions of several variables, the complex Monge-Ampère operator and some related topics

    Författare :Yang Xing; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; matematik; Mathematics;

    Sammanfattning : The classical Levin-Pfluger theory of entire functions of completely regular growth (CRG) of finite order p in one variable establishes a relation between the distribution of zeros of an entire function and its growth. The most important and interesting result in this theory is the fundamental principle for CRG functions. LÄS MER

  7. 5. Translational accuracy, ribozyme efficiency and NAD metabolism in Escherichia coli

    Författare :Martin Stancek; Leif Isaksson; Lars Hederstedt; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Escherichia coli; translational accuracy; nicotinate mononucleotide adenylyltransferase; Microbiology; Mikrobiologi;

    Sammanfattning : Interactions between the translational machinery and mRNA in Escherichia coli have been studied. In the first section nonsense codon readthrough and changed translational reading frame were measured in different growth phases. LÄS MER