CAN-FD Transceiver Design & Implementation with Improved Matching on Switching Behavior

Abstract

In the automotive industry, the automotive Integrated Chips (ICs) require a high level of Electromagnetic Immunity (EMI) and low Electromagnetic Emission (EME). EME is more important to the Controller Area Network with Flexible Data-rate (CAN-FD) because the CAN bus acts as an antenna, disturbing the other automotive ICs. In this thesis, a new architecture of CAN-FD transmitter with improved matching of the CAN bus on switching behavior is proposed resulting in reducing EME. The proposed transceiver presents the new architecture of the transmitter for driving the CAN bus using 30 step cascading current sources and a Cross-control Method which can increase matching of the CAN bus on switching behavior. The circuit implementation of the proposed transceiver was fabricated using a 0.18μm automotive BCDMOS process. The measurement results show that the result is better at matching of the CAN bus than other CAN-FD transceivers. It also shows good matching at a data-rate of 10Mbps.