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posted by  markmick on 11/6/2009 12:39:24 PM  |  status: Closed  |  Earned Karma: 29

Peak Voltage after switch is thrown

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Analog Circuits Fundamentals of Electric Circuits (3rd) by Alexander, Sadiku 8 78P 11/8/2009 at 2:00:00 PM
Question Details:
Can someone explain how this circuit even works?  I put this into PSpice and get what I expect...a solution nothing similar to this one.
Consider that Vc(0-) = 12V.  This means that Vc(0+) = 12V.  And Vr(0+) is the same node, so Vr(0+) also equals 12V.  The voltage across the airbag igniter reaches 12V instantly since it's already at 12V!  There is no underdamped "peak".  I don't get this problem.
Thanks,
Mark
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posted by Jonpp on 11/7/2009 4:26:07 PM  |  status: Live
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