Understanding Forward vs Backward:Crosstalk can be a difficult phenomenon for PCBdesigners to grasp, particularly since there are twotypes of crosstalk, forward and backward, whichbehave quite differently. Although the magnitude offorward crosstalk increases as the length of thecoupled region increases, its pulse width remainsnearly constant and independent of the length of thecoupled region. Backward crosstalk, on the otherhand, has a nearly constant magnitude that isindependent of the length of the coupled region (aslong as the coupled region is "long enough"). But itspulse width is twice as long as the coupled region.This article is Part 1 of a three-part series on crosstalk.
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