A comparison of efficient first stage decimation filters for continuous time delta sigma modulators

Christopher L. Felton, Barry Kent Gilbert, Clifton R Haider

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Low power, high signal to noise ratio, analog-to-digital converters are frequently required for biomedical applications. In addition, many such biomedical applications require high decimation rate digital filters; however, these digital filters demand significant power and circuit resources. Traditional multiplier-less cascaded integrated-comb (CIC) filter structure may be used but require large word lengths for high decimation rates. Alternatively, a cascaded minimum polyphase (CMP) structure provides a non-recursive multiplier-less decimation filter at reduced word lengths but additional filter sections. This work compares the circuit resource utilization and power consumption of the recursive and non-recursive structures. Considering small input word widths, single synchronous clock design, and hardware description synthesis, the CIC structure is more efficient than the CMP in the configurations tested.

Original languageEnglish (US)
Title of host publicationConference Record of 51st Asilomar Conference on Signals, Systems and Computers, ACSSC 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages473-477
Number of pages5
Volume2017-October
ISBN (Electronic)9781538618233
DOIs
StatePublished - Apr 10 2018
Event51st Asilomar Conference on Signals, Systems and Computers, ACSSC 2017 - Pacific Grove, United States
Duration: Oct 29 2017Nov 1 2017

Other

Other51st Asilomar Conference on Signals, Systems and Computers, ACSSC 2017
CountryUnited States
CityPacific Grove
Period10/29/1711/1/17

Keywords

  • ASIC
  • CIC
  • CIC non-recursive
  • Comb filtering
  • Decimation filtering
  • Delta sigma modulation
  • FPGA
  • HDL synthesis
  • Sine filtering

ASJC Scopus subject areas

  • Control and Optimization
  • Computer Networks and Communications
  • Hardware and Architecture
  • Signal Processing
  • Biomedical Engineering
  • Instrumentation

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    Felton, C. L., Gilbert, B. K., & Haider, C. R. (2018). A comparison of efficient first stage decimation filters for continuous time delta sigma modulators. In Conference Record of 51st Asilomar Conference on Signals, Systems and Computers, ACSSC 2017 (Vol. 2017-October, pp. 473-477). [8335384] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ACSSC.2017.8335384