Vehicle communications network with improved current sourcing

Details Vehicle communications network with improved current sourcing Vehicle communications network with improved current sourcing

H - Electricity

04

B

H04B 14/04 (2006.01) B60R 16/02 (2006.01)

Patent

CA 2169787

A vehicle communications network is provided which includes a ground translation circuit and interfacing transmitter circuits that achieve smooth current sourcing transitions. Included is a communications bus such as a J1850 having multiple-access for interfacing with a plurality of electronics, preferably within a vehicle. Each transceiver has a transmitter and receiver interfaced with the bus. The transceiver is coupled via a resistive element to the communications bus and sources current onto the bus when the transmitter output voltage exceeds the bus voltage. The added resistance advantageously reduces changes in current which may otherwise exist on the communications bus when current sourcing switches on and off.

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