Sökning: "sigma-delta modulator"

Visar resultat 1 - 5 av 12 avhandlingar innehållade orden sigma-delta modulator.

  1. 1. 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

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

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

    Sammanfattning : 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. LÄS MER

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

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

    Sammanfattning : 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. LÄS MER

  5. 4. 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

  7. 5. 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