Rolf Ernst is professor of electrical engineering at the Technical University of Braunschweig, Germany. His research interests are VLSI CAD and digital circuit design. Previously, he was a member of the technical staff in the CAD and Test Laboratory of AT&T Bell Laboratories and a research assistant at the University of Erlangen, Germany. He holds a diploma in computer science and a PhD in electrical engineering from the University of Erlangen. He is a member of the IEEE, the IEEE Computer Society, and the German GI (Society for Computer Science).