Dave W. Johnson is a senior staff engineer, electronic design, at Renesas Electronics America Inc. He has been responsible for USB 2.0 and USB 3.0 applications support and related software for product testing for the past eight years. Prior to joining Renesas (formerly NEC Electronics), he accumulated many additional years of experience in board-level design (digital and analog), data communications, MPU-based designs, technical support for PC chipsets (both core logic and graphics), and product testing software.