| 摘要 |
Controller for passenger protection means comprising a pyrotechnic unit, an energy source to provide a supply voltage for the pyrotechnic unit, a switching transistor to connect the pyrotechnic unit and the energy source. The switching transistor controlled circuit, the energy source and the pyrotechnic unit are connected in series and to a control circuit, connected in series with the switching transistor gate, which controls the switching transistor in such a way that the resistance in the controlled circuit, whilst switched on, is kept constant. The signal at the transistor gate terminal is measured to determine the energy transmitted in the switching transistor and the switching transistor is switched off when a preset value is reached.
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