Efficient Polyphase decomposition of Comb decimation filters in sigma-delta analog-to-digital converters

Abstract : A power efficient multirate multistage Comb decimation filter for mono-bit and multi-bit $\Sigma \Delta$ A/D converters is presented. Polyphase decomposition in all stages, with high decimation factor in the first stage, is used to significantly reduce the sampling frequency of the Comb filter. Several implementations indicate that proper choice of the first stage decimation factor can considerably improve power consumption, area and maximum sampling frequency. In multibit $\Sigma \Delta$ A/Ds, this optimum first stage decimation factor is a function of the input wordlength.
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https://hal.archives-ouvertes.fr/hal-01197317
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Submitted on : Friday, September 11, 2015 - 2:41:16 PM
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Hassan Aboushady, Yannick Dumonteix, Marie-Minerve Louërat, Habib Mehrez. Efficient Polyphase decomposition of Comb decimation filters in sigma-delta analog-to-digital converters. IEEE Transactions on Circuits and Systems Part 2 Analog and Digital Signal Processing, Institute of Electrical and Electronics Engineers (IEEE), 2001, 48 (10), pp.898-903. ⟨10.1109/82.974776⟩. ⟨hal-01197317⟩

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