Clock Jitter Analysis of Continuous-Time \Sigma\Delta Modulators Based on a Relative Time-Base Projection

This paper presents a novel approach to analyze clock jitter influence in the performance of continuous-time sigma-delta modulators. The analysis is based on projecting all the signals and operations over an artificial time-base relative to the sampling clock, on which the sampling period can be con...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems. I, Regular papers Regular papers, 2019-03, Vol.66 (3), p.920-929
Main Authors: Cardes, Fernando, Medina, Victor, Paton, Susana, Hernandez, Luis
Format: Article
Language:English
Subjects:
Analog-digital conversion
Band-pass filters
band-pass modulators
clock jitter
Clocks
continuous-time
data conversion
Frequency modulation
Jitter
Mathematical model
sigma-delta modulation
Topology
VCO-ADC
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Summary:This paper presents a novel approach to analyze clock jitter influence in the performance of continuous-time sigma-delta modulators. The analysis is based on projecting all the signals and operations over an artificial time-base relative to the sampling clock, on which the sampling period can be considered constant. In the proposed time-base, clock jitter can be modeled as the modulation of the input signal frequency and the integrators gain. Unlike standard techniques, we do not rely on the feedback pulse properties, which enables a broader application of our technique to band-pass or VCO-based ΣA modulators. In this paper, we present the basic theory of this technique and its application to some practical examples, showing a good matching between prediction and numerical simulation.
ISSN:1549-8328
1558-0806
DOI:10.1109/TCSI.2018.2876791