Title: System and method to avoid device stressing
Application Number: 200610136633 Application Date: 2006.10.27
Publication Number: 1983756 Publication Date: 2007.06.20
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H02H7/20
Applicant(s) Name: Internat Business Machines Cop Address:
Inventor(s) Name: Camara Hibourahima;Hsu Louis C.;Rockrohr James D.;
Attorney & Agent: huangxiao lin wangzhi sen
Abstract:
    A system for protecting a weak device operating in micro-electronic circuit that includes a high voltage power supply from high voltage overstressing prevents the weak device from failing during power-up, power-down, and when a low voltage power supply in a multiple power supply system is absent. The system includes a low voltage power supply detection circuit configured to detect circuit power-up, circuit power-down, and when the low voltage power supply is absent, and generate a control signal upon detection. The system further includes a controlled current mirror device configured to provide a trickle current to maintain a conduction channel in the weak device in response to the control signal received from the low voltage power supply detection circuit during circuit power-up, circuit power-down, and when the low voltage power supply is absent.
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