| 摘要 |
PURPOSE:To perform the appropriate distribution of ignition energy to each squib (ignition device) in the driving circuit of an occupant protecting device provided with plural squibs. CONSTITUTION:Variable resistances 105, 106 are respectively connected to plural squibs 7, 8, and ignition currents flow through the variable resistances 105, 106 at the operating time. At the non-operating time of the squibs 7, 8, micro currents are fed to the respective squibs 7, 8 by resistances 201-204. The current values flowing to the respective squibs 7, 8 in this state are detected by a loaded state monitor circuit 5, and the resistance values of the variable resistances 105, 106 are adjusted by a resistance value adjusting circuit 100 according to the detected current value. The setting of the resistance value with wiring resistance to the respective squibs 7, 8 and the like taken into account is performed by the above-mentioned adjustment of the resistance values. This results in enabling the appropriate distribution of ignition energy to the respective squibs 7, 8. |
