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DT Modeling of Clock Phase Noise Effects in LP CT Delta-Sigma ADCs with RZ Feedback

Andersson, Martin LU and Sundström, Lars LU (2009) In IEEE Transactions on Circuits and Systems - II - Express Briefs 56(7). p.530-534
Abstract
The performance of continuous-time (CT) Delta Sigma modulators is limited by their sensitivity to clock phase noise (PN). The clock PN-induced in-band noise (IBN) is dependent on the magnitude and frequency of both the desired in-band signals and the out-of-band signals, as well as the shape of the clock PN spectrum. This brief presents a discrete-time (DT) model of the dominant clock PN-induced errors. It enables fast and accurate simulations of the clock PN effects with arbitrary input signals, PN spectra, and noise-transfer functions. The model has been verified by CT simulations and measurements on a second-order low-pass CT Delta Sigma modulator with return-to-zero feedback. The flexibility and usefulness of the DT model are... (More)
The performance of continuous-time (CT) Delta Sigma modulators is limited by their sensitivity to clock phase noise (PN). The clock PN-induced in-band noise (IBN) is dependent on the magnitude and frequency of both the desired in-band signals and the out-of-band signals, as well as the shape of the clock PN spectrum. This brief presents a discrete-time (DT) model of the dominant clock PN-induced errors. It enables fast and accurate simulations of the clock PN effects with arbitrary input signals, PN spectra, and noise-transfer functions. The model has been verified by CT simulations and measurements on a second-order low-pass CT Delta Sigma modulator with return-to-zero feedback. The flexibility and usefulness of the DT model are demonstrated, and the two dominant clock PN effects are compared by means of simulations with orthogonal frequency-division multiplexing input signals and various PN specifications. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
IEEE Transactions on Circuits and Systems - II - Express Briefs
volume
56
issue
7
pages
530 - 534
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • wos:000268171700002
  • scopus:68249146449
ISSN
1558-3791
DOI
10.1109/TCSII.2009.2020950
language
English
LU publication?
yes
id
71e8860a-a7f6-47eb-a663-44cf761f62c6 (old id 1037991)
date added to LUP
2008-02-27 12:15:05
date last changed
2017-10-22 03:33:52
@article{71e8860a-a7f6-47eb-a663-44cf761f62c6,
  abstract     = {The performance of continuous-time (CT) Delta Sigma modulators is limited by their sensitivity to clock phase noise (PN). The clock PN-induced in-band noise (IBN) is dependent on the magnitude and frequency of both the desired in-band signals and the out-of-band signals, as well as the shape of the clock PN spectrum. This brief presents a discrete-time (DT) model of the dominant clock PN-induced errors. It enables fast and accurate simulations of the clock PN effects with arbitrary input signals, PN spectra, and noise-transfer functions. The model has been verified by CT simulations and measurements on a second-order low-pass CT Delta Sigma modulator with return-to-zero feedback. The flexibility and usefulness of the DT model are demonstrated, and the two dominant clock PN effects are compared by means of simulations with orthogonal frequency-division multiplexing input signals and various PN specifications.},
  author       = {Andersson, Martin and Sundström, Lars},
  issn         = {1558-3791},
  language     = {eng},
  number       = {7},
  pages        = {530--534},
  publisher    = {IEEE--Institute of Electrical and Electronics Engineers Inc.},
  series       = {IEEE Transactions on Circuits and Systems - II - Express Briefs},
  title        = {DT Modeling of Clock Phase Noise Effects in LP CT Delta-Sigma ADCs with RZ Feedback},
  url          = {http://dx.doi.org/10.1109/TCSII.2009.2020950},
  volume       = {56},
  year         = {2009},
}