DocumentCode :
2749332
Title :
Common-mode inductance and radiation of edge placed differential traces on printed circuited board
Author :
Fengchao Xiao ; Murano, K. ; Tayarani, M. ; Kami, Y.
Author_Institution :
Dept. of Inf. & Commun. Eng., Univ. of Electro-Commun., Chofu, Japan
fYear :
2003
fDate :
4-7 Nov. 2003
Firstpage :
99
Lastpage :
102
Abstract :
With respect to the single-ended trace (track), differential signaling is most advantageous to signal integrity and common-mode radiation level reduction. However, to guarantee the required signal transmission, the two tracks in the differential pair should be perfectly balanced. Edged placement of a differential pair on the PCB causes balance disruption and creates common-mode (CM) currents resulting in an increased electromagnetic interference level. We quantify the CM inductance and radiation from differential tracks with edge placement. The common-mode inductance of an edged-placed differential pair on a PCB is derived. Then the characteristics of the common-mode inductance of a differential pair are studied for different geometries. Finally, the total radiation powers for several geometries due to the edge placement of the differential pair are measured.
Keywords :
electric current; electromagnetic interference; inductance; printed circuit layout; printed circuits; PCB; common-mode currents; common-mode inductance; common-mode radiation; differential signaling; edge placed differential tracks; electromagnetic interference; printed circuit board; signal integrity; Cables; Circuit noise; Electromagnetic interference; Electromagnetic measurements; Geometry; High-speed electronics; Inductance; Magnetic flux; Printed circuits; Voltage;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Environmental Electromagnetics, 2003. CEEM 2003. Proceedings. Asia-Pacific Conference on
Conference_Location :
Hangzhou, China
Print_ISBN :
7-5635-0802-3
Type :
conf
DOI :
10.1109/CEEM.2003.238595
Filename :
1282253
Link To Document :
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