The practical limits of MASH Delta-Sigma Modulators designed to maintain very long controllable sequence lengths for structured tone mitigation

Telli, Ali; Kale, I.

doi:10.1109/wamicon.2009.5207243

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Cited by 2 publications

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References 26 publications

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“…Hybrid Key Error Feedback Modulator (HK -EFM) based MASH is proved to have long cycles which are vital to reduce the number of unwanted tones at its output. The HK -MASH is based on HK -EFM1 which is different from conventional EFM in a way that it has an additional output feedback path is denoted by az  [11], [12].…”

Section: Hybrid Key -Efmmentioning

confidence: 99%

Design of an Error Output Feedback Digital Delta Sigma Modulator with In–Stage Dithering for Spur–Free Output Spectrum

Saeed¹,

Mahmood²,

Munir³

2018

ijacsa

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Digital Delta Sigma Modulator (DDSM) is responsible for generation of spurious tones at the output of fractional n frequency synthesizer due their inherent periodicity. This results in an impure output spectrum of frequency synthesizer when they are used to generate the fractional numbers in the divider of Phase Locked Loop (PLL) based frequency synthesizer. This paper presents the design of Error-Output feedback modulator based third order Multistage noise Shaping (MASH) structure with lesser hardware and effective error compensation network to break the underlying periodicity of DDSM. The DDSM is also analyzed by using non-shaped, shaped and selfdithering mechanism to achieve a pure output spectrum and reduced quantization noise.

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Section: Hybrid Key -Efmmentioning

confidence: 99%