Abstract: In the case of a process for monitoring the operability of a weight-sensing system in a vehicle with at least one force sensor (2, 4, 6, 8), the weight-sensing system emits a warning message when a threshold value for the force acting upon the force sensor (2, 4, 6, 8) is exceeded, which warning message points to a possible damage to the weight-sensing system. This measure ensures a reliable detection of a possible failure of the weight-sensing system.

Abstract: A device for triggering an airbag having a controller, a trigger, electric lines between the controlled device and the trigger and a coil for attenuating high-frequency interference currents connected to the electric lines which in turn induces interference current into the lines as a result of an external magnetic alternating field. The attenuation of the induced interference current results from an external magnetic alternating field of the coil and a compensating coil is connected in the electric lines and arranged in the surrounding area of the coil so that the amount of current induced in the compensating coil is equal to that of the interference current induced in the coil by the external field and because they are in anti-phase, the resultant current is zero from any interference.

Abstract: A circuit arrangement for overload protection, particularly for an evaluation electronics unit for child-seat detection in a vehicle, has first and second input connections for an input voltage signal, and first and second output connections for an output voltage signal. The first input connection and the first output connection are connected to one another by means of a first circuit path; and the source/drain path of a first field-effect transistor is included in a second circuit path from the second input connection to the second output connection, to block the second circuit path if an overvoltage is present. The source/drain path of a second field-effect transistor, is included in a third circuit path between the first circuit path and that connection of the first field-effect transistor which is coupled to the second input connection. The second field effect transistor completes the third circuit path when overvoltage is present between the first and the second input connection.