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Figure Q6 shows the cross-section of the typical layout of two tracks (A and B) on a printed circuit board with a ground plane C. The tracks are terminated as shown in the figure, with track A carrying digital signals. You can assume that the lines are electrically short. (a) Describe the electromagnetic coupling (crosstalk) between tracks A and B. (b) Draw the equivalent circuit that models the crosstalk and write down a relation between the voltage applied to track A and the voltage coupled on to track B at low frequencies, VNE.

Figure Q6 shows the cross-section of the typical layout of two tracks (A and B) on a printed circuit board with a ground plane C. The tracks are terminated as shown in the figure, with track A carrying digital signals. You can assume that the lines are electrically short. (a) Describe the electromagnetic coupling (crosstalk) between tracks A and B. (b) Draw the equivalent circuit that models the crosstalk and write down a relation between the voltage applied to track A and the voltage coupled on to track B at low frequencies, VNE.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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Continued overleaf Page 4 of 5 06 Figure Q6 shows the cross-section of the typical layout of two tracks (A and B) on a printed circuit board with a ground plane C. The tracks are terminated as shown in the figure, with track A carrying digital signals. You can assume that the lines are electrically short. (a) Describe the electromagnetic coupling (crosstalk) between tracks A and B. (b) Draw the equivalent circuit that models the crosstalk and write down a relation between the voltage applied to track A and the voltage coupled on to track B at low frequencies, VNE. (c) If the total mutual inductance between the two tracks Lm = 9 nH, and the total mutual capacitance between the two tracks is Cm = 2 pF, calculate: (i) the amplitude of the near-end pulse VNE- (ii) the amplitude of the near-end pulse VNE if the driven line is terminated in a short circuit instead. Comment on the crosstalk. (d) How would you reduce the crosstalk? B C 50 2 50 2 V A B 50 Ων. V. 50 2 Vt) 1 5V 50 ns 50 ns 1 us Figure Q6 End of question paper Page 5 of 5
Transcribed Image Text:Continued overleaf Page 4 of 5 06 Figure Q6 shows the cross-section of the typical layout of two tracks (A and B) on a printed circuit board with a ground plane C. The tracks are terminated as shown in the figure, with track A carrying digital signals. You can assume that the lines are electrically short. (a) Describe the electromagnetic coupling (crosstalk) between tracks A and B. (b) Draw the equivalent circuit that models the crosstalk and write down a relation between the voltage applied to track A and the voltage coupled on to track B at low frequencies, VNE. (c) If the total mutual inductance between the two tracks Lm = 9 nH, and the total mutual capacitance between the two tracks is Cm = 2 pF, calculate: (i) the amplitude of the near-end pulse VNE- (ii) the amplitude of the near-end pulse VNE if the driven line is terminated in a short circuit instead. Comment on the crosstalk. (d) How would you reduce the crosstalk? B C 50 2 50 2 V A B 50 Ων. V. 50 2 Vt) 1 5V 50 ns 50 ns 1 us Figure Q6 End of question paper Page 5 of 5
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