| 摘要 |
A current limit circuit (10) uses a reference current (28) with zero temperature coefficient. A feedback loop (18, 26, 22) maintains substantially equal VGS for first (22) and second (24) transistors. The reference current sets the current through the first transistor which therefore limits the current in the second transistor. The second transistor is a power device that supplies current to a squib detonation device (38) in automotive air bag application. <IMAGE>
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