Jitter-Induced Noise Spectrum at the Output of Continuous-Time ΔΣ Modulators with NRZ Feedback Waveform

Hossein SHAMSI  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E92-C   No.11   pp.1406-1409
Publication Date: 2009/11/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E92.C.1406
Print ISSN: 0916-8516
Type of Manuscript: BRIEF PAPER
Category: Electronic Circuits
Keyword: 
delta-sigma modulator,  continuous-time,  NRZ waveform,  jitter,  linear system theory,  

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Summary: 
This paper proposes a closed-form formula for the jitter-induced noise spectrum at the output of continuous-time ΔΣ modulators with NRZ feedback waveform. In this approach, the clock jitter effects are modeled as an additive noise in the feedback loop of the modulator. Making use of a conceptual model and following from the linear system theory, the output spectrum is explained versus the spectrum of the additive jitter noise.