IEEE/EMC/SCV Society Meeting
Tuesday May 11, 2004
Time: 5:30 p.m. Social; 7:00 p.m. Presentation
Place: Applied Materials Bowers Cafeteria
3090 Bowers Ave., Santa Clara, CA 95051-0804
Subject: "EMI Considerations in Selection of Ethernet Magnetics"
Speaker: Neven Pischl
Abstract:
Ethernet devices use magnetics between the transceiver and Ethernet
cable. Magnetics include center-tapped transformers,
autotransformers, and common-mode chokes. Newer Ethernet devices use
magnetics to provide 48V power. Integrated connectors, with built-in
magnetics, are gaining popularity. The characteristics of these
components are critical for EMI suppression.
It is completely impossible to judge the EMI characteristics from
information currently available in the magnetics data sheets.
Magnetics EMI properties can be measured with a network analyzer on a
50 ohm test jig, but it should be kept in mind that the system-level
performance may differ. Magnetics cannot be completely characterized
without knowing the system characteristics. Also, test results depend
on the test methods that are not yet standardized.
The presentation explains the main factors that define EMI properties
of Ethernet magnetics, in commonly used configurations. A bench-level
test method for magnetics characterization is described, and a
demonstration will be given. The focus will be on Ethernet magnetics,
but the concepts apply generally to WAN and LAN magnetics.
About the presenter:
Neven Pischl has 19 years of EMC and related experience in R&D,
Aerospace, Consumer Electronics, and ITE, covering many areas of EMC
compliance and high-speed design. He holds an MSEE degree,
specialized in microwave measurements, NARTE EMC-Engineer
certification, and two US patents related to differential signaling.
Currently his main focus is design for high immunity, low noise and
low emission ITE containing high-speed digital and sensitive analog
circuitry. He is a Principal Engineer at Broadcom Communications in
San Jose, CA.
Contact: [email protected].
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Technical Committee emc-pstc discussion list.
Visit our web site at: http://www.ieee-pses.org/
To cancel your subscription, send mail to:
[email protected]
with the single line:
unsubscribe emc-pstc
For help, send mail to the list administrators:
Ron Pickard: [email protected]
Dave Heald: [email protected]
For policy questions, send mail to:
Richard Nute: [email protected]
Jim Bacher: [email protected]
All emc-pstc postings are archived and searchable on the web at:
http://www.ieeecommunities.org/emc-pstc
