Publication detail

Analysis of the Common-Mode Radiation from Differential Signalling on Printed Circuit Boards

NAVRÁTIL, V.

English title

Analysis of the Common-Mode Radiation from Differential Signalling on Printed Circuit Boards

Type

conference paper

Language

en

Original abstract

An investigation of common mode EMI of differential signalling is presented. Based on results for the single trace, closed-form expressions for the differential pair in proximity to a reference plane are developed and numerically validated. It is found that when the traces are placed near the edge of the reference plane or beyond, the inductive coupling becomes comparable to the common-mode inductance of conventional single trace routing, even for perfectly balanced currents. In the case of small current asymmetries the common-mode attenuation is almost destroyed. The developed expressions provide a quantification of common-mode EMI issues of differential signalling.

English abstract

An investigation of common mode EMI of differential signalling is presented. Based on results for the single trace, closed-form expressions for the differential pair in proximity to a reference plane are developed and numerically validated. It is found that when the traces are placed near the edge of the reference plane or beyond, the inductive coupling becomes comparable to the common-mode inductance of conventional single trace routing, even for perfectly balanced currents. In the case of small current asymmetries the common-mode attenuation is almost destroyed. The developed expressions provide a quantification of common-mode EMI issues of differential signalling.

Keywords in English

Differential signalling, Common-mode radiation, Electromagnetic compatibility

RIV year

2003

Released

18.02.2003

Publisher

ETHZ Switzerland

Location

Zurich Switzerland

ISBN

3-9521199-7-0

Book

Proc. of the 15th Int. Zürich Symp. on Electromagn. Compatibility

Pages count

6

BIBTEX


@inproceedings{BUT7976,
  author="Vlastimil {Navrátil},
  title="Analysis of the Common-Mode Radiation from Differential Signalling on Printed Circuit Boards",
  booktitle="Proc. of the 15th Int. Zürich Symp. on Electromagn. Compatibility",
  year="2003",
  month="February",
  publisher="ETHZ Switzerland",
  address="Zurich Switzerland",
  isbn="3-9521199-7-0"
}