Initial Condition-Dependent Spur Pattern Induced by Undithered MASH DDSM Divider Controller
International Symposium on Circuits and Systems（2023）
摘要
The Multi-stAge noiSe sHaping digital delta-sigma modulator (MASH DDSM) is the most used divider controller architecture for fractional-N frequency synthesis. It is well-known that a MASH DDSM divider controller can cause input-dependent spurious tones in the output spectrum of a synthesizer. This paper discusses MASH 1-1-1 DDSM-induced spurious tone patterns that are dependent on the initial conditions.
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关键词
digital delta-sigma modulator,divider controller architecture,fractional-N frequency synthesis,initial condition-dependent spur pattern induced,initial conditions,input-dependent spurious tones,MASH 1-1-1,multistage noise,spurious tone patterns,undithered MASH DDSM divider controller
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