Spur Performance and Relative Implementation Costs of MASH and ENOP Digital ΔΣ Modulators

The Digital Modulator (DDSM) is an integral component in fractional-N Phase-Locked Loops (PLLs) for frequency synthesis where it is used to achieve the fractional part of the frequency. Compared to a conventional DDSM, which is infamous for exhibiting spurious tones, the Enhanced Non-Linearity Induc...

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Bibliographic Details
Published in2024 35th Irish Signals and Systems Conference (ISSC) pp. 1 - 6
Main Authors Goyal, Sanil, Kennedy, Michael Peter
Format Conference Proceeding
LanguageEnglish
Published IEEE 13.06.2024
Subjects
Costs
enhanced non-linearity induced noise performance (ENOP)
Frequency modulation
Frequency synthesizers
implementation cost
modulators
Multi-stage noise shaping
Noise
noise performance
nonlinearity
Phase modulation
Power demand
spur immunity
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Summary:The Digital Modulator (DDSM) is an integral component in fractional-N Phase-Locked Loops (PLLs) for frequency synthesis where it is used to achieve the fractional part of the frequency. Compared to a conventional DDSM, which is infamous for exhibiting spurious tones, the Enhanced Non-Linearity Induced Noise Performance (ENOP) DDSM can be designed so that it does not produce spurious tones when used in a PLL with a polynomial nonlinearity. This paper focuses on quantifying the relative implementation costs of conventional DDSMs and ENOP DDSM variants.
ISSN:2688-1454
DOI:10.1109/ISSC61953.2024.10603135