Trigger circuit for a device for protecting occupants of a vehicle

摘要

A trigger circuit for a device for protecting occupants of motor vehicles is described, having an acceleration sensor for outputting a signal which corresponds to the deceleration of the motor vehicle in the event of an impact against an obstacle, having an evaluation circuit which evaluates the output signal of the acceleration sensor, a switch which, starting from a specific value (trigger value) of the output signal of the evaluation circuit, triggers the safety device by means of a firing element, and with a self-diagnostic function for the trigger circuit with a data transmission device for outputting status information on the status of the trigger circuit and a data receiver which is connected to a fault indicator and to an intelligent interface, data pulses being sent via a signal line which is identical to the power supply line of the trigger circuit.