How does the CAN protocol physically operate regarding signal transmission over its dedicated wires?
Answer
Differential signaling over two wires (CAN-High and CAN-Low)
The physical layer of the CAN protocol relies on differential signaling transmitted across two dedicated wires, conventionally named CAN-High and CAN-Low. Differential signaling involves sending complementary signals on these two wires. This method provides exceptional robustness against external electrical noise, a crucial feature in the electromagnetically hostile environment found near a car's engine, ignition systems, and motors. By measuring the voltage difference between the two lines rather than the absolute voltage of one line relative to ground, the system effectively rejects common-mode noise.
Related Questions
Who led the team that invented the Controller Area Network (CAN bus) at Robert Bosch GmbH?When did the development of the Controller Area Network (CAN bus) begin in earnest at Robert Bosch GmbH?What fundamental type of protocol is the CAN protocol based on, according to its technical foundation description?What specific non-destructive technique does CAN use to manage network access and prioritize time-critical information?Which vehicle marked the first commercial application of the CAN bus in 1991?What ISO standard formally recognized the Controller Area Network protocol?How does the CAN protocol physically operate regarding signal transmission over its dedicated wires?What strategic decision did Bosch make regarding the CAN specification in 1991 concerning proprietary control?In the message-based CAN protocol, what two purposes does the message identifier serve?What primary issue involving vehicle wiring harnesses necessitated the development of the CAN bus system?Which sector, besides automotive engineering, utilizes CAN networks based on its core strengths?