An Improved Recursive and Non-recursive Comb Filter for DSP Applications

Rozita Teymourzadeh and Masuri Othman

MPRA Paper from University Library of Munich, Germany

Abstract: The recursive and non-recursive comb filters are commonly used as decimators for the sigma delta modulators. This paper presents the analysis and design of low power and high speed comb filters. The comparison is made between the recursive and the non-recursive comb filters with the focus on high speed and saving power consumption. Design procedures and examples are given by using Matlab and Verilog HDL for both recursive and non-recursive comb filter with emphasis on frequency response, transfer function and register width. The implementation results show that non-recursive comb filter has capability of speeding up the circuit and reducing power compared to recursive one when the decimation ratio and filter order are high. Using Modified Carry Look-ahead Adder for summation and also apply pipelined filter structure makes it more compatible for DSP application.

Keywords: Decimation; CIC; comb; Filters; Converters; Sigma Delta A/D conversion; comb filters; decimation filters (search for similar items in EconPapers)
JEL-codes: F14 L0 L16 L6 O14 (search for similar items in EconPapers)
Date: 2006-05-15
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Published in The 6th Asian Control Conference (2006): pp. 413-417

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