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The most appropriate filter for the first stage of any decimation filter with a large value of decimation factor is a Cascaded Integrator Comb (CIC) filter. CIC Decimation Filter is characterized by a drop in its Passband gain and very less attenuation in its stopband. So, to improve the frequency response of CIC Decimation Filter for compensation of Passband Droop and Stopband Attenuation, various CIC filter architectures have been developed. This paper discusses various CIC filter architectures that are used for Sigma-Delta based Analog-to-Digital Converter (ADC) applications. Also, their performance is compared by defining a new parameter called as Noise factor. The filter architecture consisting of cascaded CIC, sine, and cosine filters performs best in terms of Noise factor for all the values of Decimation ratio.

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Comparison of Different CIC Filter Architectures on the Basis of a Novel Parameter Called Noise Factor for Sigma-Delta Based ADCs

  • 会议论文

  • 发表日期：

    2025年

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  • Pushpendra Dwivedi,
  • Meena Panchore,
  • Pushpa Raikwal,
  • Akash Agarwal

摘要

The most appropriate filter for the first stage of any decimation filter with a large value of decimation factor is a Cascaded Integrator Comb (CIC) filter. CIC Decimation Filter is characterized by a drop in its Passband gain and very less attenuation in its stopband. So, to improve the frequency response of CIC Decimation Filter for compensation of Passband Droop and Stopband Attenuation, various CIC filter architectures have been developed. This paper discusses various CIC filter architectures that are used for Sigma-Delta based Analog-to-Digital Converter (ADC) applications. Also, their performance is compared by defining a new parameter called as Noise factor. The filter architecture consisting of cascaded CIC, sine, and cosine filters performs best in terms of Noise factor for all the values of Decimation ratio.