Electromagnetic emissions reduction in a CAN transceiver system

This project deals with the emissions behavior of a Controller Area Network (CAN). CAN systems are widely used in automotive applications. Recently, CAN systems have expanded their applications to fields like medical, industrial automation and even high end home appliances. This paper discussed the important features of using CAN systems, one of which is the electromagnetic emissions behavior of the systems, especially in automotive applications. The motivation for the research discussed in this paper is to gain a better understanding of the effect different signals has on emissions. The most widely accepted solution to this problem is using a common mode capacitor on the signals. This reduces the variation of the common mode signal, which, in turn, reduces the emissions. This signal variation, along with other variations, was evaluated in this research. The objectives of this research are to quantify the effect each signal variation has on emissions.