Part one of this article explained EMC basic strategies and provided useful hints.
While it is merely a nuisance to experience radio interference, it is definitely a serious matter if an ABS, stability control, or airbag suffers a malfunction because a vehicle passes a TV tower too closely. Thus, mastering EMC is a basic requirement for automotive electronics designers. Part two of this article outlines methods to suppress high-frequency resonance.
Read the complete article here, which discusses equivalent circuit models of the capacitor, mulitple capacitors for broadband decoupling, and board layout considerations, courtesy of Automotive Designline Europe.
The article is certainly correct about the need to consider the entire "system" in order to understand what a filter circuit is really doing. Of course, the real challenge is often in meeting cost constraints while still providing adequate protection. That is why designing for EMC must start at the very beginning, even with the selection of active devices, in order to assure that there will be no unfortunate surprises later on. This would also include a careful examination of production variables, including the liberties taken by PCB layout designers.
David Patterson, known for his pioneering research that led to RAID, clusters and more, is part of a team at UC Berkeley that recently made its RISC-V processor architecture an open source hardware offering. We talk with Patterson and one of his colleagues behind the effort about the opportunities they see, what new kinds of designs they hope to enable and what it means for today’s commercial processor giants such as Intel, ARM and Imagination Technologies.