Search for dissertations about: "sigma delta modulator"

Showing result 1 - 5 of 17 swedish dissertations containing the words sigma delta modulator.

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

    Author : Mattias Andersson; Institutionen för elektro- och informationsteknik; []
    Keywords : 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;

    Abstract : 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. READ MORE

  4. 2. Wideband Sigma-Delta Modulators

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

    Abstract : 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. READ MORE

  5. 3. Modeling and Analysis of Wideband Sigma-Delta Noise Shapers

    Author : Andreas Göthenberg; KTH; []
    Keywords : Data Converters; Oversampling; Sigma-Delta; Modulators; Wideband; Noise Shapers; Sampling Switches; Substrate Noise Coupling;

    Abstract : The continuous evolution of CMOS technologies towards deepsubmicron processes has provided new opportunities forintegration of mixed-signal systems on single monolithicintegrated circuits. In order to find the optimal usage of CMOStechnology and robustness against undesired mixed-signalcouplings, new approaches to CMOS front-end integration areneeded. READ MORE

  6. 4. Digitally Enhanced Continuous-Time Sigma-Delta Analogue-to-Digital Converters

    Author : Julian Garcia; Ana Rusu; Maurits Ortmanns; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; analogue-to-digital conversion; sigma-delta modulation; digital enhancement; continuous-time; multi-channel applications;

    Abstract : The continuous downscaling of CMOS technology presents advantagesand difficulties for IC design. While it allows faster, denser and more energy efficient digital circuits, it also imposes several challenges which limit the performance of analogue circuits. READ MORE

  7. 5. Low-Power Delta-Sigma Modulators for Medical Applications

    Author : Ali Fazli Yeknami; Atila Alvandpour; Martin Anderson; Linköpings universitet; []
    Keywords : ;

    Abstract : 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. READ MORE