| 摘要 |
PURPOSE: To ignite a plurality of squibs securely by mounting a connection resistance corresponding to a plurality of squib ignition circuits between the respective plurality of squib ignition circuits and a power. CONSTITUTION: Negative electrode side of four squibs 141, 151, 161 and 171 are connected in common and grounded by a safing sensor 18. Gates of four switching elements 142, 152, 162 and 172 are connected in common and grounded by a drive transistor 191 to a control part 182. Four squib circuits 14-17 are respectively connected to a power bus 13 through four connection resistors 144, 154, 164 and 174. Whereby, the drive transistor 191 becomes ON state when a collision signal is detected from the control part 192 and allows the four switching elements 142, 152, 162 and 172 to be ON. The four squibs 141, 151, 161 and 171 are allowed to be ignition state securely when the safing sensor 18 is mechanically made ON.
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