Optimal filtering of incremental first-order sigma-delta modulators with sweep input

Maréchal, Sylvain; Krummenacher, F.; Kayal, Maher

doi:10.1109/icecs.2010.5724568

Cited by 3 publications

(3 citation statements)

References 6 publications

(7 reference statements)

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“…Finally, different from the classial linear filters whose passband signal droop can be corrected, conversion error of the proposed decoder is larger for varying inputs and cannot be corrected. Therefore, it is more suitable for dc or near-dc signal conversions or converters with S&H. For varying inputs, the scheme in [19] can be explored. Fig.…”

Section: Influence Of Modulator Nonidealitiesmentioning

confidence: 99%

Near-Optimal Decoding of Incremental Delta-Sigma ADC Output

Wang

Law

Belhaouari

et al. 2020

IEEE Trans. Circuits Syst. I

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This paper presents a nonlinear digital decoder (reconstruction filter) for incremental delta-sigma modulators. This decoder utilizes both the magnitude and pattern information of the modulator output to achieve accurate input estimation. Compared to the conventional linear filters with the same oversampling ratio (OSR), it can improve the converter's signalto-quantization noise ratio by a few dB to a few 10's of dB with slight thermal noise performance degradation. Using the proposed decoder, the modulator's OSR can be a few times less while achieving the same resolution and data rate, thus minimizing the modulator as well as its peripheral circuits' energy consumption. In this paper, the proposed decoder is optimized for digital implementation, with its function being verified using a modulator prototype. This decoder is mainly designed for dc or near-dc signal conversions and it does not provide frequency notches.

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Section: Influence Of Modulator Nonidealitiesmentioning

confidence: 99%

Near-Optimal Decoding of Incremental Delta-Sigma ADC Output

Wang

Law

Belhaouari

et al. 2020

IEEE Trans. Circuits Syst. I

View full text Add to dashboard Cite

show abstract

“…It is thus possible to perform the decoding in two steps: -Decode the first stage as developed in [4].…”

Section: Mash11 -Optimal Decodermentioning

confidence: 99%

“…Nevertheless, a few investigations were led to develop optimal filters. Most of them focus on first-order modulators with a constant [1,2,3] or linear [4] input, in an ideal or noisy [5,6] configuration. The single-loop second-order structure was also analysed and an optimal filter was derived [7].…”

Section: Introductionmentioning

confidence: 99%