BROADCAST SERIAL BUS TERMINATION

摘要

A subsea broadcast serial bus system includes a broadcast serial bus having a first signal line and a second signal line. One or more nodes are connected in parallel to the first signal line and the second signal line of the broadcast serial bus. Each node connects the first signal line to the second signal line via a node impedance. A subsea node connected to the broadcast serial bus includes an adjustable impedance that may be adjusted based on the number of nodes connected to the broadcast serial bus.

主权项

1. A broadcast serial bus termination circuit for a broadcast serial bus, the broadcast serial bus having a variable number of nodes connected thereto, wherein each node of the variable number of nodes is connected in parallel to a first signal line and a second signal line of the broadcast serial bus, wherein each node of the variable number of nodes connects the first signal line to the second signal line via a node impedance and wherein the broadcast serial bus is configured for operation with a predetermined bus impedance, the broadcast serial bus termination circuit comprising:
an adjustable impedance connected, in operation, between the first signal line and the second signal line of the broadcast serial bus; and an adjusting unit configured for adjusting the adjustable impedance based on a number of the nodes connected to the broadcast serial bus, such that a total impedance of the broadcast serial bus corresponds to the predetermined bus impedance for different numbers of nodes.