Controlling and activating bus coupled components eg car radio CD player etc. - has components coupled by interface units onto bus with wake up circuit periodically operated

摘要

The bus system control method is provided for an installation having three components (10, 11, 12) that are connected onto a bus system (16). Each component has its own interface (10a, 11a, 12a) and the bus can be an electrical or optical cable. The component can, for example, be an automobile radio, CD player or loudspeakers. The interface circuits are configured as 'wake up' circuits that are held in the standby mode. The circuit has a pulse generator, comparator and reference voltage source. Activation signals are transmitted over the bus to power up the units. USE/ADVANTAGE - Provides activation of bus coupled components. Used in road vehicles.