Sökning: "Digital filter"

Visar resultat 11 - 15 av 160 avhandlingar innehållade orden Digital filter.

  1. 11. Digital Mammography with a Photon Counting Detector in a Scanned Multislit Geometry

    Författare :Magnus Åslund; Mats Danielsson; Ehsan Samei; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; mammography; digital; photon counting; scanning; detective quantum effciency; scattered radiation; automatic exposure control; Physics; Fysik;

    Sammanfattning : Mammography screening aims to reduce the number of breast cancer deaths by early detection of the disease, which is one of the leading causes of deaths for middle aged women in the western world. The risk from the x-ray radiation in mammography is relatively low but still a factor in the benefit-risk ratio of screening. LÄS MER

  3. 12. Architecture and Implementation of Comb Filters and Digital Modulators for Oversampling A/D and D/A Converters

    Författare :Yonghong Gao; KTH; []
    Nyckelord :Comb Filter; Digital Modulator; Oversampling; A D and D A Converter;

    Sammanfattning : .... LÄS MER

  4. 13. 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. 14. On mapping of digital filter algorithms to hardware

    Författare :Oscar Gustafsson; Ulf Sjöström; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : In this thesis we discuss various issues involving the design path for low power design of frequency-selective digital filters. As recursive filters have a bound on the minimal iteration period, Tmin we focus on these. Implementations that obtain Tmin are known as maximally fast. LÄS MER

  7. 15. Custom Designed Digital Signal Processors Using Bit-Serial Arithmetic

    Författare :Peter Nilsson; Institutionen för elektro- och informationsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; On-Chip Clocking; Digital IF-Filtering; Digital Wideband Filtering; Elektronik; Electronics; Bit-Serial Arithmetic; CMOS; Custom DSP; VLSI;

    Sammanfattning : This thesis presents two prime contributions. First, digital filters for both intermediate and base band filtering for mobile communication are presented. Second, a local clock for on-chip clock generation is introduced. The intermediate frequency filter is a digital alternative to today's analog filters. LÄS MER