Patent ID: 9057846
Filing Date: 2015-06-16
Classification: G02B,H04B,H04L

Abstract:
1. A device for adapting a controller area network (CAN) bus for optical communication, the device comprising: a CAN transceiver coupled to a CAN bus, configured to sense levels on the CAN bus and supply a first signal indicating the sensed levels, and configured to receive a second signal and drive a corresponding level on the CAN bus; an opto-electrical converter configured to convert an optical input to an electrical signal to supply the second signal; an electro-optical converter configured to convert a third electrical signal to an optical signal to supply an optical output; a direction detection flip-flop configured to receive the second signal from the opto-electrical converter and the first signal from the CAN transceiver and to produce a direction detection signal by latching the status of the second signal at transitions of the first signal corresponding to transitions of the CAN bus from a recessive state to a dominant level; and a transmit enable buffer coupled to the first signal and configured to produce the third electrical signal by conditionally outputting the first signal based on the direction detection signal.