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Module tamper detection circuitry

  • US 5,867,095 A
  • Filed: 08/15/1997
  • Issued: 02/02/1999
  • Est. Priority Date: 08/15/1997
  • Status: Expired due to Term
First Claim
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1. A tamper detection apparatus for use in an electrical module which has an access port closed by a removable element comprising:

  • a supervisory sensor for detecting removal of the element;

    a delay circuit, coupled to the sensor, for generating an output signal a predetermined time interval after removal of the element wherein the output signal is indicative of the element'"'"'s not being replaced on the module during the time interval.

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