Welcome to the High-Speed Digital Design Newsletter! Dr. Howard Johnson, featured Signal Integrity columnist for EDN magazine, and co-author of "High-Speed Digital Design: A Handbook of Black Magic" (Prentice Hall 1993) takes questions from readers and students of his HSDD seminars on subjects ranging from high-speed system design, to signal integrity and high-speed digital signaling. Comments invited! Send your emails to hsdd@sigcon.com Please note: Due to the volume of questions received, we cannot guarantee either an immediate or an individual response. We do try, however!