[SI-LIST] : Re: Guard banding

Robert Voelker ([email protected])
Wed, 12 Nov 1997 11:17:35 -0800 (PST)


Another approach to reduce crosstalk between lines of a bus is to
transpose the conductors every so often along the length of the bus.
Basically, this prevents two conductors from being nearest neighbors
for the entire length of the bus. This approach is effective
if not all of the lines are switching simultaneously, such as in
a control bus. An added benefit is that there is less propagation
delay skew than in an ordinary parallel bus.

The technique is described in "Transposing Conductors in Signal Buses
to Reduce Nearest-Neighbor Crosstalk," R. H. Voelker, IEEE Trans.
Microwave Thoery Tech., vol. 43, no.5, pp. 1095-1099, May 1995.

Robert H. Voelker, Ph.D. Sun Microelectronics Div.=20
Signal Integrity Specialist Sun Microsystems, Inc.=20
Phone: (408) 328-8836 M/S USUN03-312=20
FAX: (408) 774-8769 901 San Antonio Road=20
Sun internal phone: x48836 Palo Alto, CA 94303=20
EMAIL: [email protected] USA

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Date: Tue, 11 Nov 1997 20:20:23 -0500
From: Istvan Novak <[email protected]>
Subject: [SI-LIST] : Guard banding
To: SI list <[email protected]>
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Without claiming that the list is complete, here are some of the
publications on crosstalk reduction that I am aware of. Many of them
actually deal with grounded traces to reduce crosstalk, some include
comparison with measured data.

Istvan Novak

Y.-C. Jeong, C.-C. Park, L.-S. Kim, "A new crosstalk compensation method in
line inversion TFT-LCD's," IEEE Transactions on Circuits and Systems, Part
I: Fundamental Theory and Applications, Vol.44, June 1997, pp. 552-555.
L. Lu, V. Ungvichian, "An Optimization Technique to Minimize Crosstalk in
Multi-Layered and Multi-Microstrip-Line Board of High Speed Digital
Circuits," Proceedings of the 1996 EMC Symposium, Santa Clara, August
19-23, pp. 442-447.
J. C. Coetzee, J. Joubert, "Full-Wave Characterization of the Crosstalk
Reduction effect of an Additional Grounded track Introduced Between Two
Printed Circuit Tracks," IEEE Transactions on Circuits and Systems I:
Fundamental Theory and Applications, July 1996, Vol. 43, No.7, pp. 553-558.
T.R. Gazizov, "Computer Simulation of EM Coupling in Interconnects of a
Double-Layered Dielectric PCB: Parallel Lines on One Side of the Layer,"
Proceedings of the 1996 Wroclaw EMC Symposium, pp. 230-234. (Crosstalk
compensation by double-layered dielectric)
W. P. Liao, F. L. Chu, "Structure compensation for reduction of the
interline crosstalk on high-speed high-density PCB," Proceedings of the
International Symposium on Electromagnetic Compatibility, September 17-20,
1996, Rome, Italy, pp. 612-616.
M.-K. Kim, "Crosstalk Control for Microstrip Circuits on PCBs at Microwave
Frequencies," Proceedings on the 1995 International Conference on EMC, pp.
T. R. Gazizov, N. I. Bazenkov, "On the Crosstalk Reduction in
Printed-Circuit Boards," Proceedings of the 1994 Wroclaw EMC Symposium,
June 27-30, 1994, pp. 550-553.
B. Eged, I. Novak, P. Bajor, "Crosstalk Reduction on Stripline Printed
Circuit Boards with Additional Centre Traces," Proceedings of the 1994 EMC
Symposium, May 16-20, 1994, Sendai, Japan, pp. 316-319.
B. Eged, F. Mernyei, I. Nov=E1k, P. Bajor, "Reduction of Far-End Crosstalk =
Coupled Microstrip PCB Interconnect," presented at the Instrumentation and
Measurement Technology Conference, May 10-12, 1994, Shizuoka, Japan, pp.
Walter Guggenbuhl, Guy Morbach, "Forward Crosstalk Compensation on Bus
Lines," IEEE Transactions on Circuits and Systems - I, Vol. 40, no. 8,
August 1993, pp. 523-527.
I. Novak, B. Eged, L. Hatvani, "Measurement by Vector-Network Analyser and
Simulation of Crosstalk Reduction on Printed Circuit Boards with Additional
Centre Traces," Proc. of IEEE Instrumentation and Measurement Technology
Conference, Irvine, CA, May 18-20, 1993.
J. P. K. Gilb, C. A. Balanis, "Coupling Reduction in High-Speed,
High-Density Digital Interconnects with Substrate Compensation, " Proc. of
IEEE Topical Meeting on Electrical Performance of Electronic Packaging,
Tucson, AZ, April 22-24, 1992, pp. 116-118.
J. B. Marshall, R. B. Linville, "Explanation for the Dual Dielectric
Phenomenon in Differential Crosstalk Control," 21st International Wire and
Cable Symposium, Atlantic City, December 5-7, 1972.

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