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Test circuit for detection of malfunctions in an electric triggering device

  • US 5,515,027 A
  • Filed: 06/02/1993
  • Issued: 05/07/1996
  • Est. Priority Date: 11/23/1990
  • Status: Expired due to Term
First Claim
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1. A test circuit for detection of malfunctions in electronic triggering devices for protection of vehicle occupants, comprising:

  • two or more of triggering devices connected in parallel, said triggering devices arranged with a first connector connected to ground and a second connector connected to a control unit for supplying a triggering current to said triggering devices upon detection of a triggering condition;

    a voltage regulator for supplying a constant reference voltage;

    a current generator for generating a constant current connected in series between said voltage regulator and said second connector for generating a test current to said triggering devices; and

    two voltage comparators connected between ground, said second connector and said voltage regulator for detecting the voltage across said triggering devices.

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