Efficient Dithering in MASH Sigma-Delta Modulators for Fractional Frequency Synthesizers

The digital multistage-noise-shaping (MASH) ΣΔ modulators used in fractional frequency synthesizers are prone to spur tone generation in their output spectrum. In this paper, the state of the art on spur-tone-magnitude reduction is used to demonstrate that an M -bit MASH architecture dithered by a s...

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Veröffentlicht in:	IEEE transactions on circuits and systems. I, Regular papers Regular papers, 2010-09, Vol.57 (9), p.2394-2403
Hauptverfasser:	Gonzalez-Diaz, Victor Rodolfo, Garcia-Andrade, Miguel Angel, Flores-Verdad, Guillermo Espinosa, Maloberti, Franco
Format:	Artikel
Sprache:	eng
Schlagworte:	Circuits Delta-sigma modulation Digital Digital modulation Dithering Dithers Fractional Frequency modulation Frequency synthesizers Hardware Linear feedback shift registers Modulators Multi-stage noise shaping Noise shaping phase noise Quantization Sigma-Delta spur tones Studies Topology
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