Decimation Lowpass Filters for Sigma-Delta Modulators | A Comparative Study

Rüdiger Kusch

ISBN 10: 3838662326 / ISBN 13: 9783838662329

Published by Diplom.de, 2002

About this Item

Decimation Lowpass Filters for Sigma-Delta Modulators | A Comparative Study | Rüdiger Kusch | Taschenbuch | 188 S. | Englisch | 2002 | [.] | EAN 9783838662329 | Verantwortliche Person für die EU: Dryas Verlag, ein Imprint der Bedey und Thoms Media GmbH, Hermannstal 119k, 22119 Hamburg, kontakt[at]dryas[dot]de | Anbieter: preigu.

Seller Inventory # 105469943

Bibliographic Details

• Title: Decimation Lowpass Filters for Sigma-Delta Modulators | A Comparative Study
• Publisher: Diplom.de
• Publication Date: 2002
• Language: English
• ISBN 10: 3838662326
• ISBN 13: 9783838662329
• Binding: Taschenbuch
• Condition: Neu
• Dimensions: 210W x 148H x 14D millimeters 210 millimeters width by 148 millimeters height by 14 millimeters depth
• Weight: 281 grams
• Seller catalogs:
  • Bücher

About this title

Synopsis

Studienarbeit, die am 03.03.1998 erfolgreich an einer Technische Universit?t in Deutschland im Fachbereich Elektrotechnik eingereicht wurde. Abstract: The purpose of this thesis is to compare several filter topologies used for the decimation of sigma-delta modulated digital signals. The goal is to present optimized filter architectures with regard to an efficient VLSI implementation. A fifth-order 1-bit sigma-delta modulator using local feedback techniques will be considered as the front-end A/D converter. The subsequent digital filter reduces the sampling rate by a factor of 32. The decimation filter must guarantee a narrow transition band between 0.5 and 0.55 and stopband attenuation of 100dB. Chapter 1 provides a brief introduction into the principles of digital signal processing. The considerations are focused on FIR filters due to the requirements for acoustic applications. Chapter 2 illustrates the proposed overall structure and the design flow. The objective of chapter 3 is to present the principles of oversampling data converters using sigma-delta techniques. The 5V fifth-order SD-modulator with 90dB dynamic range (SNR+THD) will be presented, which has been fabricated in 1.2?m CMOS technology. For the sake of simplicity and robustness, a 1-bit quantizer will be used. Chapter 4 deals with typical hardware realizations of digital filters. Apart from the "brute force" implementation of the multirate filter with identical filters running in parallel, also the LUT-based approach for small filter orders will be presented. Due to the advantages of compact implementation, the bit-serial approach and the bit-serial multiplier are investigated in detail. In chapter 5 the straightforward one-stage multirate FIR filter will be introduced. To satisfy the specifications, a 4096 tap lowpass FIR filter will be designed. The influence of coefficient quantization is investigated and furthermore the "block scaling" met