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Spur-Free and Stable Digital Delta-Sigma Modulator via Using HK-EFM

Abstract : This paper presents a new multi-stage noise-shaping (MASH) digital delta-sigma modulator (DDSM), denoted as HJ-MASH DDSM which can remove spurs in the output spectrum and has long sequence lengths than Jinook structure and HK-MASH in the worst input case by applying HK-EFM in the first stage error feedback modulator (EFM) of the DDSM. In addition, the proposed HJ-MASH DDSM lowers the difficulty of constructing higher order MASH DDSMs compared to HK-MASH DDSM. While the performance and stability are all superior to Jinook structure for all constant inputs, especially for the input which correspond to minimum cycle lengths. The digital delta-sigma modulator applied in fractional-N frequency synthesizers ameliorates the synthesizer’s spectral purity apparently by verification.
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https://hal.inria.fr/hal-01675435
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Submitted on : Thursday, January 4, 2018 - 2:30:09 PM
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Xiangning Fan, Pengpeng Shi, Yilong Liao, Jian Tao. Spur-Free and Stable Digital Delta-Sigma Modulator via Using HK-EFM. 15th International Conference on Wired/Wireless Internet Communication (WWIC), Jun 2017, St. Petersburg, Russia. pp.304-314, ⟨10.1007/978-3-319-61382-6_25⟩. ⟨hal-01675435⟩

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