ARRANGEMENT, IN PARTICULAR IN VEHICLES, FOR TRANSMITTING ELECTRIC SIGNALS BY CONNECTING LINES

摘要

Weak-current electric signals are transmitted over two-wire lines in which is arranged a pin-and-socket connector (51, 61). The two-wire lines are terminated by coils (56, 66) coupled by a transformer in the pin-and-socket connector (51, 61). Control signals for electric consumers arranged in the vehicle doors and LF signals for loudspeakers arranged in the vehicle doors can thus be transmitted from a control apparatus (1) located away from the door to a door module over a common data line and the pin-and-socket connector. For that purpose, binary coded control signals are modulated on a carrier signal and the LF audio signal is also modulated on the same carrier signal. The signals are demodulated and separated according to their frequencies in the door module. The LF signals are amplified and supplied to a loudspeaker. The control signals are evaluated by a micro-controller and control via switching stages regulating elements provided in the door.