INTRA-CAR SIGNAL TRANSMITTER

摘要

PURPOSE:To secure the data transmission with no error by providing a slave station for control of devices in a car and a master station fo transmission of a control command to the slave station and detecting the generation of noises due to the engine control to stop transmission of the control command to the slave station by the master station. CONSTITUTION:The output signal of an edge detecting circuit 105 is delayed by a delay circuit 105 for a proper period of time during which a transient phenomenon caused in an ignition mode and noises are eliminated and then supplied to a control processing circuit 101 in the form of a transmission start signal. The circuit 101 starts transmission of signals with the timing of said transmission start signal. A timing circuit 106 counts the time intervals of the output signals of the circuit 105 and informs the ignition cycle and the conduction time value to the circuit 101. The circuit 101 decides a transmissible transmission/reception cycle with no disturbance from said two time width values and then controls a transmission/reception circuit 102 to perform transmission between ignition noises.