Impact of clock net routing on EMC emissions performance of automotive electronic modules

Abstract

Modern automotive electronic products with highspeed digital interfaces pose design challenges in the areas of signal integrity (SI) and electromagnetic compatibility (EMC). On one hand, the manufacturer must comply with legal and industry specific EMC requirements and on the other hand, the product is expected to function seamlessly over all environmental conditions and process tolerances. Numerous guidelines have been published on how to optimize the design performance in these two areas (EMC & SI) but few address the impact one can have on the other. This paper examines the impact several SI compliant routing patterns have on EMC emissions performance.