Douglas Brooks has more than forty years of electronics industry experience, ranging from circuit design engineer on the space program to president of his own manufacturing company. For the last twenty years, he has been president of UltraCAD Design, Inc., a premier PCB design service bureau in the Pacific Northwest. He has published hundreds of articles and served on the faculty of San Diego State University and as visiting associate professor at the University of Washington. He has taught numerous seminars on signal integrity in PCB design throughout the United States, Europe, and Asia, and is the author of Signal Integrity Issues and Printed Circuit Board Design (Prentice Hall, 2003).