Darrell A. Teegarden has over 20 years of experience in development of HDL-based models and software tools. He currently manages the SystemVision VHDL-AMS related tool development for the System Level Engineering division at Mentor Graphics Corporation in Wilsonville, Oregon. Darrell is an IEEE member and holds a B.S., Chemical Engineering from Oregon State University and an M.S., Electrical Engineering from Stanford University. He is a co-author of The System Designer's Guide to VHDL-AMS: Analog, Mixed-Signal, and Mixed-Technology Modeling.